Citation: Tiantian Gong, Yanan Chen, Shuo Wang, Miao Wang, Junwei Zhao. Rigid-flexible-ligand-ornamented lanthanide-incorporated selenotungstates and photoluminescence properties[J]. Chinese Journal of Structural Chemistry, ;2024, 43(9): 100370. doi: 10.1016/j.cjsc.2024.100370 shu

Rigid-flexible-ligand-ornamented lanthanide-incorporated selenotungstates and photoluminescence properties

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.
- Polyoxometalates,
- Selenotungstates,
- Organic-inorganic hybrid materials,
- Photoluminescence
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