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2024 Volume 43 Issue 9
2024, 43(9): 100335
doi: 10.1016/j.cjsc.2024.100335
Abstract:
To construct efficient room-temperature phosphorescence (RTP) doping systems by simple doping methods, isomers 2-(2-(9H-carbazol-9-yl) benzyl) malononitrile (o-CzCN), 2-(3-(9H-carbazol-9-yl) benzyl) malononitrile (m-CzCN) and 2-(4-(9H-carbazol-9-yl) benzyl) malononitrile (p-CzCN) were designed and synthesized by choosing commercial carbazole. Based on the structure-function relationships of three isomers and excellent compatibility between carbazole and benzocarbazole, 2-(3-(9H-carbazol-9-yl) benzyl) malononitrile (Lm-CzCN) and 2-(3-(5H-benzo[b]carbazol-5-yl) benzyl) malononitrile (m-BCzCN) were prepared by self-made carbazole and 2-naphthylamine. Then, Lm-CzCN/m-BCzCN was constructed and optimized by dissolution and rapid evaporation, as well as tuning the mass ratios between Lm-CzCN and m-BCzCN. Lm-CzCN shows excitation dependent RTP and afterglow lifetimes, as well as concentration dependent RTP emission in poly(vinyl alcohol) (PVA) films, while 1% m-BCzCN@PVA film emits bright green afterglow, with RTP and afterglow lifetimes of 2.303 and 17 s in turn, as well as RTP quantum yield of 0.22. More importantly, Lm-CzCN/m-BCzCN presents ultra-long room temperature phosphorescence, with RTP and afterglow lifetimes of 597.58 ms and 8 s, respectively. Moreover, crystals m-CzCN and p-CzCN, as well as Lm-CzCN/m-BCzCN can be excited by visible light of 440 nm, showing yellow afterglow of 1–4 s. Noteworthy, polymorphism o-CzCNY and o-CzCNB were found, whose different emission was investigated by molecular conformation, intermolecular arrangement and stacking patterns. Finally, multiple encryptions were successfully constructed based on the different luminescent properties.
To construct efficient room-temperature phosphorescence (RTP) doping systems by simple doping methods, isomers 2-(2-(9H-carbazol-9-yl) benzyl) malononitrile (o-CzCN), 2-(3-(9H-carbazol-9-yl) benzyl) malononitrile (m-CzCN) and 2-(4-(9H-carbazol-9-yl) benzyl) malononitrile (p-CzCN) were designed and synthesized by choosing commercial carbazole. Based on the structure-function relationships of three isomers and excellent compatibility between carbazole and benzocarbazole, 2-(3-(9H-carbazol-9-yl) benzyl) malononitrile (Lm-CzCN) and 2-(3-(5H-benzo[b]carbazol-5-yl) benzyl) malononitrile (m-BCzCN) were prepared by self-made carbazole and 2-naphthylamine. Then, Lm-CzCN/m-BCzCN was constructed and optimized by dissolution and rapid evaporation, as well as tuning the mass ratios between Lm-CzCN and m-BCzCN. Lm-CzCN shows excitation dependent RTP and afterglow lifetimes, as well as concentration dependent RTP emission in poly(vinyl alcohol) (PVA) films, while 1% m-BCzCN@PVA film emits bright green afterglow, with RTP and afterglow lifetimes of 2.303 and 17 s in turn, as well as RTP quantum yield of 0.22. More importantly, Lm-CzCN/m-BCzCN presents ultra-long room temperature phosphorescence, with RTP and afterglow lifetimes of 597.58 ms and 8 s, respectively. Moreover, crystals m-CzCN and p-CzCN, as well as Lm-CzCN/m-BCzCN can be excited by visible light of 440 nm, showing yellow afterglow of 1–4 s. Noteworthy, polymorphism o-CzCNY and o-CzCNB were found, whose different emission was investigated by molecular conformation, intermolecular arrangement and stacking patterns. Finally, multiple encryptions were successfully constructed based on the different luminescent properties.
2024, 43(9): 100336
doi: 10.1016/j.cjsc.2024.100336
Abstract:
Modulation of zeolite porosity, including the size and type of channel and cage, is essential for catalysis and separation. Although zeolites with a variety of porous systems have been synthesized by hydrothermal or post-synthetic routes, there is still a lack of rational control of zeolite porosity in the range of large to medium pore/cage. Herein, based on the rational structure building, the structure similarity between IWV topology with large-pore opening and supercage and NES topology with medium-pore opening and medium cage is discovered. Based on the guidance of structure building, two IWV-derived daughter zeolites with different framework compositions, (Si,Ge) -ECNU-31 and (Si,Ge,Al) -ECNU-31, are hydrothermally prepared with built-in structural weakness due to the presence of a large amount of framework Ge atoms, which are utilized to prepare ECNU-32 zeolite with NES topology through subsequent post-synthetic treatment under controlled condition. It is demonstrated that the parent IWV zeolite with only Ge and Si as framework atoms is benefit in post-treatment to obtain a highly crystalline NES zeolite. In contrast, the co-existence of framework Al atoms in (Si,Ge,Al) -ECNU-31 zeolite enhances its hydrothermal stability in water. However, the treatment with acid and amine solutions causes the partial collapse of zeolite structure. Our results demonstrate that rational selection of the framework composition and post-synthetic parameters are crucial for the transformation of large-pore zeolite to medium-pore zeolite.
Modulation of zeolite porosity, including the size and type of channel and cage, is essential for catalysis and separation. Although zeolites with a variety of porous systems have been synthesized by hydrothermal or post-synthetic routes, there is still a lack of rational control of zeolite porosity in the range of large to medium pore/cage. Herein, based on the rational structure building, the structure similarity between IWV topology with large-pore opening and supercage and NES topology with medium-pore opening and medium cage is discovered. Based on the guidance of structure building, two IWV-derived daughter zeolites with different framework compositions, (Si,Ge) -ECNU-31 and (Si,Ge,Al) -ECNU-31, are hydrothermally prepared with built-in structural weakness due to the presence of a large amount of framework Ge atoms, which are utilized to prepare ECNU-32 zeolite with NES topology through subsequent post-synthetic treatment under controlled condition. It is demonstrated that the parent IWV zeolite with only Ge and Si as framework atoms is benefit in post-treatment to obtain a highly crystalline NES zeolite. In contrast, the co-existence of framework Al atoms in (Si,Ge,Al) -ECNU-31 zeolite enhances its hydrothermal stability in water. However, the treatment with acid and amine solutions causes the partial collapse of zeolite structure. Our results demonstrate that rational selection of the framework composition and post-synthetic parameters are crucial for the transformation of large-pore zeolite to medium-pore zeolite.
2024, 43(9): 100349
doi: 10.1016/j.cjsc.2024.100349
Abstract:
Fascinating physico-chemical features of functionalized metallic nanoparticles (MNPs), which offer a high surface-to-volume ratio, biocompatibility, and flexible functionalities, are considered as potential building blocks in functionalized nano/biointerface, facilitating stable biosensing detection response towards various biological analytes. MNPs-based colorimetric biosensors have received enormous attention in chemistry, biology, and medicine owing to their simplicity, practicality, low-cost, high stability, and selectivity. Principally, the colorimetric biosensing is low-cost; it does not require advanced analytical instruments because the change in color of nanoparticle dispersion can be directly read out via the naked-eye, which is indeed used for on-field analysis and point-of-care (POC) analyses. Notably, MNPs such as gold, silver, iron oxide, and cerium oxide have been used for the simple and facile colorimetric detection of biologically important analytes via changes in various colors. In this review, the biosensing mechanism is based on the change in colors of MNPs toward the detection of clinically important biomolecules (glucose, ochratoxin A (OTA), etc.), deoxyribonucleic acid (DNA), prostate-specific antigen (PSA), α-fetoprotein (AFP), lipopolysaccharide (LPS), carcinoembryonic antigen (CEA), and proteins in various real samples. This promising discipline, at the interface of nanomaterials and biosciences, offers extensive projections for interdisciplinary researchers that comprise nanomaterial preparation, bio-element functionalization, and targeted detection in clinical diagnostics. The potential approaches for new colorimetric substrate design, important biosensing characteristics, challenges, and future opportunities for colorimetric biosensing strategies are also described.
Fascinating physico-chemical features of functionalized metallic nanoparticles (MNPs), which offer a high surface-to-volume ratio, biocompatibility, and flexible functionalities, are considered as potential building blocks in functionalized nano/biointerface, facilitating stable biosensing detection response towards various biological analytes. MNPs-based colorimetric biosensors have received enormous attention in chemistry, biology, and medicine owing to their simplicity, practicality, low-cost, high stability, and selectivity. Principally, the colorimetric biosensing is low-cost; it does not require advanced analytical instruments because the change in color of nanoparticle dispersion can be directly read out via the naked-eye, which is indeed used for on-field analysis and point-of-care (POC) analyses. Notably, MNPs such as gold, silver, iron oxide, and cerium oxide have been used for the simple and facile colorimetric detection of biologically important analytes via changes in various colors. In this review, the biosensing mechanism is based on the change in colors of MNPs toward the detection of clinically important biomolecules (glucose, ochratoxin A (OTA), etc.), deoxyribonucleic acid (DNA), prostate-specific antigen (PSA), α-fetoprotein (AFP), lipopolysaccharide (LPS), carcinoembryonic antigen (CEA), and proteins in various real samples. This promising discipline, at the interface of nanomaterials and biosciences, offers extensive projections for interdisciplinary researchers that comprise nanomaterial preparation, bio-element functionalization, and targeted detection in clinical diagnostics. The potential approaches for new colorimetric substrate design, important biosensing characteristics, challenges, and future opportunities for colorimetric biosensing strategies are also described.
2024, 43(9): 100352
doi: 10.1016/j.cjsc.2024.100352
Abstract:
Zou and co-workers' work demonstrates that multisite fine-tuning is an effective strategy for modifying the emissions of hybrid metal halide. Through systematic chemical composition engineering, they successfully discover a unique multicolor phosphor [BPy]2CdX4:xSb3+, which achieves a wide range of tunable emissions within a single-component material. Furthermore, the characteristic of rich emission color covering a wide spectral range from blue to near-infrared identifies [BPy]2CdX4:xSb3+ as a promising luminescent material for high-security anti-counterfeiting applications. Zou and co-workers provide valuable insights into the design of new hybrid metal halide luminescent materials with tunable emissions, and their discovery is scientifically interesting.
Zou and co-workers' work demonstrates that multisite fine-tuning is an effective strategy for modifying the emissions of hybrid metal halide. Through systematic chemical composition engineering, they successfully discover a unique multicolor phosphor [BPy]2CdX4:xSb3+, which achieves a wide range of tunable emissions within a single-component material. Furthermore, the characteristic of rich emission color covering a wide spectral range from blue to near-infrared identifies [BPy]2CdX4:xSb3+ as a promising luminescent material for high-security anti-counterfeiting applications. Zou and co-workers provide valuable insights into the design of new hybrid metal halide luminescent materials with tunable emissions, and their discovery is scientifically interesting.
2024, 43(9): 100353
doi: 10.1016/j.cjsc.2024.100353
Abstract:
Chloroprene is a monomer widely used in the production of neoprene, and 1-hydroxy-2-butanone (1H2B) is one of the metabolites of chloroprene in urine, which can place a significant impact on human health by disrupting the normal structure and function of DNA. Herein, a three-dimensional Zn-based coordination polymer (1) and a two-dimensional Cd-based coordination polymer (2) were synthesized with mixed ligands of 2,5-furandicarboxylic acid (H2FDA) and 1,2,4-triazole (Htrz) and fully characterized. 2 exhibits excellent stability and superior sensing performance for 1H2B with fast response within 15 s, good recyclability and a detection limit of 9.24 μM. In addition, 2 demonstrates good selectivity in presence of main coexisting compounds in urine. In-depth investigations of the sensing mechanism revealed that the luminescence sensing is based on the competitive absorption and photoelectron transfer processes.
Chloroprene is a monomer widely used in the production of neoprene, and 1-hydroxy-2-butanone (1H2B) is one of the metabolites of chloroprene in urine, which can place a significant impact on human health by disrupting the normal structure and function of DNA. Herein, a three-dimensional Zn-based coordination polymer (1) and a two-dimensional Cd-based coordination polymer (2) were synthesized with mixed ligands of 2,5-furandicarboxylic acid (H2FDA) and 1,2,4-triazole (Htrz) and fully characterized. 2 exhibits excellent stability and superior sensing performance for 1H2B with fast response within 15 s, good recyclability and a detection limit of 9.24 μM. In addition, 2 demonstrates good selectivity in presence of main coexisting compounds in urine. In-depth investigations of the sensing mechanism revealed that the luminescence sensing is based on the competitive absorption and photoelectron transfer processes.
2024, 43(9): 100354
doi: 10.1016/j.cjsc.2024.100354
Abstract:
Organic ligands play a pivotal role in lanthanide luminescence by acting as sensitizers for energy absorption and transfer, a phenomenon known as the fluorescence antenna effect. Herein, we introduce two tetradentate nitrogen ligands renowned for their efficient sensitization of lanthanide luminescence, with their luminous efficacy finely adjustable through subtle modifications to their structure. Through the synthesis of four Eu(III) /Tb(III) mononuclear complexes via the complexation of ligands 6,6′-bis(4,5-dihydrooxazol-2-yl) -2,2′-bipyridine (bpybox, L1) and 6,6′-bis(4,5-dihydrothiazol-2-yl) -2,2′-bipyridine (thio-bpybox, L2) with europium/terbium trifluorosulfonate, structural analysis reveals that the lanthanide ion coordinates with eight nitrogen atoms from two ligands and one oxygen atom from trifluorosulfonate. Among them, two Eu(III) complexes ([Eu(L1) 2(SO3CF3) ](SO3CF3) 2 EuL1 and [Eu(L2) 2(SO3CF3) ](SO3CF3) 2 EuL2) and one Tb(III) complex ([Tb(L1) 2(SO3CF3) ](SO3CF3) 2 TbL1) exhibit luminosity, displaying characteristic lanthanide metal ion luminescence characterized by high fluorescence quantum yields and prolonged excited state lifetimes. In contrast, TbL2 ([Tb(L2) 2(SO3CF3) ](SO3CF3) 2) is non-luminous, with the sole structural distinction being the substitution of oxygen atoms with sulfur atoms within the ligand. This minor alteration significantly impacts the triplet (3T) state energy level of the ligands, thereby influencing their sensitizing effect on Tb(III) luminescence. These findings underscore the remarkable efficiency of bpybox-type ligands as sensitizers for Ln(III) luminescence, with their structural versatility enabling effective modulation of luminous capacities and efficiency.
Organic ligands play a pivotal role in lanthanide luminescence by acting as sensitizers for energy absorption and transfer, a phenomenon known as the fluorescence antenna effect. Herein, we introduce two tetradentate nitrogen ligands renowned for their efficient sensitization of lanthanide luminescence, with their luminous efficacy finely adjustable through subtle modifications to their structure. Through the synthesis of four Eu(III) /Tb(III) mononuclear complexes via the complexation of ligands 6,6′-bis(4,5-dihydrooxazol-2-yl) -2,2′-bipyridine (bpybox, L1) and 6,6′-bis(4,5-dihydrothiazol-2-yl) -2,2′-bipyridine (thio-bpybox, L2) with europium/terbium trifluorosulfonate, structural analysis reveals that the lanthanide ion coordinates with eight nitrogen atoms from two ligands and one oxygen atom from trifluorosulfonate. Among them, two Eu(III) complexes ([Eu(L1) 2(SO3CF3) ](SO3CF3) 2 EuL1 and [Eu(L2) 2(SO3CF3) ](SO3CF3) 2 EuL2) and one Tb(III) complex ([Tb(L1) 2(SO3CF3) ](SO3CF3) 2 TbL1) exhibit luminosity, displaying characteristic lanthanide metal ion luminescence characterized by high fluorescence quantum yields and prolonged excited state lifetimes. In contrast, TbL2 ([Tb(L2) 2(SO3CF3) ](SO3CF3) 2) is non-luminous, with the sole structural distinction being the substitution of oxygen atoms with sulfur atoms within the ligand. This minor alteration significantly impacts the triplet (3T) state energy level of the ligands, thereby influencing their sensitizing effect on Tb(III) luminescence. These findings underscore the remarkable efficiency of bpybox-type ligands as sensitizers for Ln(III) luminescence, with their structural versatility enabling effective modulation of luminous capacities and efficiency.
2024, 43(9): 100356
doi: 10.1016/j.cjsc.2024.100356
Abstract:
In conclusion, we have demonstrated the preparation of TPE-derived imidazo[1,5-α]pyridinium salt H4-L(PF6) 4, which was used for accessing dinuclear silver(I) and gold(I) tetracarbene metallacycles [Ag2L](PF6) 2 and [Au2L](PF6) 2. The initially weakly emissive H4-L(PF6) 4 exhibited a remarkable enhancement of fluorescence intensities upon metalation to form the dinuclear silver(I) and gold(I) tetracarbene complexes in dilute solution. Upon the gradual addition of water as a poor solvent to the acetonitrile solution of TPE-derived complexes, the precursor H4-L(PF6) 4 exhibited typical AIE characteristics. However, metal complexes [M2L](PF6) 2 (M = Ag, Au) showed weak emission in aggregated state. Based on this fact, silver(I) tetracarbene complex [Ag2L](PF6) 2 has been employed as a turn-on fluorescent sensor for PA via a self-destructive reaction. This work provides novel insights into the fabrication of stimulus-responsive organometallic materials with potential applications in biological studies.
In conclusion, we have demonstrated the preparation of TPE-derived imidazo[1,5-α]pyridinium salt H4-L(PF6) 4, which was used for accessing dinuclear silver(I) and gold(I) tetracarbene metallacycles [Ag2L](PF6) 2 and [Au2L](PF6) 2. The initially weakly emissive H4-L(PF6) 4 exhibited a remarkable enhancement of fluorescence intensities upon metalation to form the dinuclear silver(I) and gold(I) tetracarbene complexes in dilute solution. Upon the gradual addition of water as a poor solvent to the acetonitrile solution of TPE-derived complexes, the precursor H4-L(PF6) 4 exhibited typical AIE characteristics. However, metal complexes [M2L](PF6) 2 (M = Ag, Au) showed weak emission in aggregated state. Based on this fact, silver(I) tetracarbene complex [Ag2L](PF6) 2 has been employed as a turn-on fluorescent sensor for PA via a self-destructive reaction. This work provides novel insights into the fabrication of stimulus-responsive organometallic materials with potential applications in biological studies.
2024, 43(9): 100357
doi: 10.1016/j.cjsc.2024.100357
Abstract:
In conclusion, two feasible strategies have recently been proposed to develop an innovative solar-powered all-day wearable thermoregulatory system for efficient personalized thermoregulation. The first strategy involves large-area preparation of wearable thermoregulatory fabrics with embedded thermoelectric modules, and the second focuses on driving EC devices by the OPV module for full day/night bidirectional thermal management. Both systems show promise for advanced thermoregulation applications and enhance human survival in extreme environments such as polar regions and individual space walking. However, further optimization is required in terms of system performance and practicality, including thermal conductivity and integrability of materials.
In conclusion, two feasible strategies have recently been proposed to develop an innovative solar-powered all-day wearable thermoregulatory system for efficient personalized thermoregulation. The first strategy involves large-area preparation of wearable thermoregulatory fabrics with embedded thermoelectric modules, and the second focuses on driving EC devices by the OPV module for full day/night bidirectional thermal management. Both systems show promise for advanced thermoregulation applications and enhance human survival in extreme environments such as polar regions and individual space walking. However, further optimization is required in terms of system performance and practicality, including thermal conductivity and integrability of materials.
2024, 43(9): 100358
doi: 10.1016/j.cjsc.2024.100358
Abstract:
Hybrid organic-inorganic perovskites (HOIP) have attracted increasing interest in the last decade. While current research in this field focuses on metal halide HOIPs because of their excellent photovoltaic and optoelectronic properties, other hybrid perovskites are also being designed and developed for other properties. Among them, HOIPs bridged by nitrate show structural diversity and a remarkable range of physical properties. In this mini review, we summarize their structural features and rich physical properties including structural phase transitions, ferroelectric, piezoelectric, piezomagnetic and photoluminescencent properties. In addition, the challenges for improving the physical properties achieved by such materials and the space for further development of such materials are also discussed.
Hybrid organic-inorganic perovskites (HOIP) have attracted increasing interest in the last decade. While current research in this field focuses on metal halide HOIPs because of their excellent photovoltaic and optoelectronic properties, other hybrid perovskites are also being designed and developed for other properties. Among them, HOIPs bridged by nitrate show structural diversity and a remarkable range of physical properties. In this mini review, we summarize their structural features and rich physical properties including structural phase transitions, ferroelectric, piezoelectric, piezomagnetic and photoluminescencent properties. In addition, the challenges for improving the physical properties achieved by such materials and the space for further development of such materials are also discussed.
2024, 43(9): 100369
doi: 10.1016/j.cjsc.2024.100369
Abstract:
Therefore, the new class of d-f transition-based rare earth complexes present a promising strategy for realizing highly efficient OLED devices, particularly suitable for SLWOLEDs compared to moderate progress associated with f-f transition-based complexes. Observing the limited role of host materials in exciton energy transfer and reduced energy transfer from higher energy emitter to low energy emitter at higher doping concentration lays a significant foundation for exploring d-f transition-based rare earth complexes in single color and SLWOLEDs devices. Demonstrating the ambient stability of Eu2+ complexes through delicate ligand engineering strategies will facilitate leveraging the advantages of d-f transitions, such as short excited-state lifetimes and adjustable emission wavelengths, advancing this class of materials as the new generation rare earth complexes for OLED applications.
Therefore, the new class of d-f transition-based rare earth complexes present a promising strategy for realizing highly efficient OLED devices, particularly suitable for SLWOLEDs compared to moderate progress associated with f-f transition-based complexes. Observing the limited role of host materials in exciton energy transfer and reduced energy transfer from higher energy emitter to low energy emitter at higher doping concentration lays a significant foundation for exploring d-f transition-based rare earth complexes in single color and SLWOLEDs devices. Demonstrating the ambient stability of Eu2+ complexes through delicate ligand engineering strategies will facilitate leveraging the advantages of d-f transitions, such as short excited-state lifetimes and adjustable emission wavelengths, advancing this class of materials as the new generation rare earth complexes for OLED applications.
2024, 43(9): 100370
doi: 10.1016/j.cjsc.2024.100370
Abstract:
Currently, organic-inorganic hybrid lanthanide-incorporated polyoxometalates (POMs) have emerged as a prominent research area. Herein, we employ a simple raw material assembly method to synthesize two neoteric mixed-organic-ligand-ornamented lanthanide (Ln) incorporated selenotungstates [H2N(CH3) 2]16Na2[Ln4(H2O) 6(HPZDA) 2(HFMA) 2W8O21][B-α-SeW9O33]4·29H2O (Ln = Sm3+ (1), La3+ (2) ; H2PZDA = 2,3-pyrazine dicarboxylic acid, H2FMA = fumaric acid) . 1 and 2 are isomorphic with the polyanions constructed from four trivacant Keggin [B-α-SeW9O33]8– ({SeW9}) segments and a rigid-flexible-ligand-ornamented dodeca-nuclear W–Ln heterometallic [Ln4(H2O) 6(HPZDA) 2(HFMA) 2W8O21]14+ cluster. Moreover, the solid-state fluorescence spectrum of 1 at room temperature mainly exhibits the characteristic emission peak of Sm3+ cations. Additionally, energy transfer from {SeW9} to Sm3+ ions in 1 has been demonstrated by time-resolved spectroscopy. This work presents a feasible dual-ligand synergistic strategy for constructing novel POM derivatives and POM-based fluorescent materials.
Currently, organic-inorganic hybrid lanthanide-incorporated polyoxometalates (POMs) have emerged as a prominent research area. Herein, we employ a simple raw material assembly method to synthesize two neoteric mixed-organic-ligand-ornamented lanthanide (Ln) incorporated selenotungstates [H2N(CH3) 2]16Na2[Ln4(H2O) 6(HPZDA) 2(HFMA) 2W8O21][B-α-SeW9O33]4·29H2O (Ln = Sm3+ (1), La3+ (2) ; H2PZDA = 2,3-pyrazine dicarboxylic acid, H2FMA = fumaric acid) . 1 and 2 are isomorphic with the polyanions constructed from four trivacant Keggin [B-α-SeW9O33]8– ({SeW9}) segments and a rigid-flexible-ligand-ornamented dodeca-nuclear W–Ln heterometallic [Ln4(H2O) 6(HPZDA) 2(HFMA) 2W8O21]14+ cluster. Moreover, the solid-state fluorescence spectrum of 1 at room temperature mainly exhibits the characteristic emission peak of Sm3+ cations. Additionally, energy transfer from {SeW9} to Sm3+ ions in 1 has been demonstrated by time-resolved spectroscopy. This work presents a feasible dual-ligand synergistic strategy for constructing novel POM derivatives and POM-based fluorescent materials.
2024, 43(9): 100371
doi: 10.1016/j.cjsc.2024.100371
Abstract:
In summary, as we deepen our understanding of the synthetic and structural chemistry of superatomic AgNCs stabilized by O-donor ligands, it becomes clear that these ligands — whether organic, inorganic, or hybrid organic-inorganic — are poised to become the next-generation building blocks for expanding the realm of atomically precise metal nanoclusters with tailored properties.
In summary, as we deepen our understanding of the synthetic and structural chemistry of superatomic AgNCs stabilized by O-donor ligands, it becomes clear that these ligands — whether organic, inorganic, or hybrid organic-inorganic — are poised to become the next-generation building blocks for expanding the realm of atomically precise metal nanoclusters with tailored properties.
2024, 43(9): 100372
doi: 10.1016/j.cjsc.2024.100372
Abstract:
In summary, the proposal and development of ligand chelation method not only promotes the progress of lanthanide cluster crystal engineering, but also provides opportunities for the construction of highly stable lanthanide clusters. In addition, the introduction of multidentate chelating ligands promotes the self-assembly mechanism of lanthanide clusters and takes a big step towards the controllable construction of lanthanide clusters of specific shapes.
In summary, the proposal and development of ligand chelation method not only promotes the progress of lanthanide cluster crystal engineering, but also provides opportunities for the construction of highly stable lanthanide clusters. In addition, the introduction of multidentate chelating ligands promotes the self-assembly mechanism of lanthanide clusters and takes a big step towards the controllable construction of lanthanide clusters of specific shapes.
2024, 43(9): 100391
doi: 10.1016/j.cjsc.2024.100391
Abstract:
Generally, stable and robust RTP materials with high efficiency and long lifetime are required for practical applications. The commonly used matrices including PMMA and PVA are essentially non-luminescent and they serve merely as a rigid cage to restrict the movement of guest molecules and exclude water and oxygen. The potential host-guest energy transfer with the use of a luminescent matrix, like nylon, may provide an effective strategy to boost the generation of triplet excitons and thus increase the phosphorescence efficiency.
Generally, stable and robust RTP materials with high efficiency and long lifetime are required for practical applications. The commonly used matrices including PMMA and PVA are essentially non-luminescent and they serve merely as a rigid cage to restrict the movement of guest molecules and exclude water and oxygen. The potential host-guest energy transfer with the use of a luminescent matrix, like nylon, may provide an effective strategy to boost the generation of triplet excitons and thus increase the phosphorescence efficiency.
