Login In
2003 Volume 14 Issue 10
2003, 14(10): 991-992
Abstract:
Reaction of polymer-supported α-selenoaldehydes with Grignard reagents affordedpolymer-bound β-hydroxyalkyl selenides, which treated with thionyl chloride and triethylamineleading to (E)-1, 2-disubstituted ethenes in good yield.
Reaction of polymer-supported α-selenoaldehydes with Grignard reagents affordedpolymer-bound β-hydroxyalkyl selenides, which treated with thionyl chloride and triethylamineleading to (E)-1, 2-disubstituted ethenes in good yield.
2003, 14(10): 993-996
Abstract:
4-Aryl/alkyl-3, 4-dihydro-2(1H)-pyrimidone esters and 5-acetyl-4-aryl/or alkyl-6-methyl-3, 4-dihydropyrimidin-2(1)-ones were synthesised efficiently using montmorillonite clay-SmCl3 6H2O system promoted by microwave irradiation in solventless condition.
4-Aryl/alkyl-3, 4-dihydro-2(1H)-pyrimidone esters and 5-acetyl-4-aryl/or alkyl-6-methyl-3, 4-dihydropyrimidin-2(1)-ones were synthesised efficiently using montmorillonite clay-SmCl3 6H2O system promoted by microwave irradiation in solventless condition.
2003, 14(10): 997-998
Abstract:
The tricyclic compound 1, a key intermediate of the pentacyclic core of Et 743 and its analogues, was synthesized. Its 11-epimer was found as the product of racemization when BOP was used as the coupling agent, but not when BOP-Cl used in the same reaction. The stereochemistry of both isomers was confirmed on basis of the 1H NMR and NOE-difference spectra.
The tricyclic compound 1, a key intermediate of the pentacyclic core of Et 743 and its analogues, was synthesized. Its 11-epimer was found as the product of racemization when BOP was used as the coupling agent, but not when BOP-Cl used in the same reaction. The stereochemistry of both isomers was confirmed on basis of the 1H NMR and NOE-difference spectra.
2003, 14(10): 999-1001
Abstract:
Starting from 1H-pyrrole, unreported 3, 4-dihydropyrrolo[2, 1-c][1, 4]oxazin-1-one 4, 7-(4-chlorobenzoyl)-3, 4-dihydropyrrolo[2, 1-c][1, 4]oxazin-l-one 5 and 7-benzoyl-3, 4-dihydro-pyrrolo [2, 1-c][1, 4]oxazin-1-one 9 were designed and synthesized. They may have antipyretic and analgesic activities.
Starting from 1H-pyrrole, unreported 3, 4-dihydropyrrolo[2, 1-c][1, 4]oxazin-1-one 4, 7-(4-chlorobenzoyl)-3, 4-dihydropyrrolo[2, 1-c][1, 4]oxazin-l-one 5 and 7-benzoyl-3, 4-dihydro-pyrrolo [2, 1-c][1, 4]oxazin-1-one 9 were designed and synthesized. They may have antipyretic and analgesic activities.
2003, 14(10): 1002-1004
Abstract:
Room temperature ionic liquids were used as a "green" recyclable alternative to conventional solvents in the synthesis of pharmaceutically useful compounds 2-arylimidazo[1, 2-a]pyrimidines through Tschotschibabin reaction of α-bromoacetophenones with 2-aminopyfinidinein good yields.
Room temperature ionic liquids were used as a "green" recyclable alternative to conventional solvents in the synthesis of pharmaceutically useful compounds 2-arylimidazo[1, 2-a]pyrimidines through Tschotschibabin reaction of α-bromoacetophenones with 2-aminopyfinidinein good yields.
2003, 14(10): 1005-1007
Abstract:
α, α'-Bis(substituted benzylidene)cycloalkanones were efficiently prepared fromcycloalkanones and benzaldehydes in [bmim][BF4] by using iron(Ⅲ) chloride hexahydrate as acatalyst. It is shown that [bmim][BF4] and iron(Ⅲ) chloride hexahydrate can be quantitativelyrecovered and be reused effectively for many times. Compared with the known methods, thisnovel process has the advantage of being an environmentally benign process together with goodyields and mild reaction conditions.
α, α'-Bis(substituted benzylidene)cycloalkanones were efficiently prepared fromcycloalkanones and benzaldehydes in [bmim][BF4] by using iron(Ⅲ) chloride hexahydrate as acatalyst. It is shown that [bmim][BF4] and iron(Ⅲ) chloride hexahydrate can be quantitativelyrecovered and be reused effectively for many times. Compared with the known methods, thisnovel process has the advantage of being an environmentally benign process together with goodyields and mild reaction conditions.
2003, 14(10): 1008-1011
Abstract:
A new chiral polymer-metal complex, wool-osmium tetroxide(wool-OsO4) complex was prepared by a very simple method. This complex was found to be able to catalyze the asymmetric dihydroxylation of allylamine to get (R)-(+)-3-amino-1, 2-propanediol. The experimental results showed that OsO4 content in the complex, reaction time, allylamine/OsO4 molar ratio all have great effects on the chemical and optical yields of product. Additionally, wool-OsO4 complex catalyst could be reused without remarkable change in optical catalytic activity.
A new chiral polymer-metal complex, wool-osmium tetroxide(wool-OsO4) complex was prepared by a very simple method. This complex was found to be able to catalyze the asymmetric dihydroxylation of allylamine to get (R)-(+)-3-amino-1, 2-propanediol. The experimental results showed that OsO4 content in the complex, reaction time, allylamine/OsO4 molar ratio all have great effects on the chemical and optical yields of product. Additionally, wool-OsO4 complex catalyst could be reused without remarkable change in optical catalytic activity.
2003, 14(10): 1012-1014
Abstract:
A general synthesis of diaryl ethers via coupling of aryl halides with substituted phenoxytrimethylsilane in the presence of TBAF is described. The protocol is simple and mild, and gives good to excellent yields.
A general synthesis of diaryl ethers via coupling of aryl halides with substituted phenoxytrimethylsilane in the presence of TBAF is described. The protocol is simple and mild, and gives good to excellent yields.
2003, 14(10): 1015-1017
Abstract:
Hedychenone (1), a diterpene containing α, β-unsaturated keto group, was reduced by aluminum-mercury alloy, and a dimerized product (2) was obtained as the major product. The coupling occurred at β position of the keto group.
Hedychenone (1), a diterpene containing α, β-unsaturated keto group, was reduced by aluminum-mercury alloy, and a dimerized product (2) was obtained as the major product. The coupling occurred at β position of the keto group.
2003, 14(10): 1018-1020
Abstract:
The reductive deoxygenation of aldehydes and ketones into the corresponding alkanes is accomplished by LiAlH4 in the presence of Lewis acid InBr3. It provides a convenient method to complete the transformation from carbonyl compounds to alkanes.
The reductive deoxygenation of aldehydes and ketones into the corresponding alkanes is accomplished by LiAlH4 in the presence of Lewis acid InBr3. It provides a convenient method to complete the transformation from carbonyl compounds to alkanes.
2003, 14(10): 1021-1023
Abstract:
The ring-opening polymerization of ε-caprolactone (CL) initiated by novel single lanthanide tris(4-tert-butylphenolate)s [Ln(OTBP)3] is reported. Single-component La(OTBP)3 can effectively prepare polycaprolactone (PCL) with over 90% yield and viscosity average molecular weight about 60×103 under quite mild conditions:molar ratio of CL to initiator is 1000, 60℃, 2 h in toluene. Mechanism study indicates that the monomer inserts into the growing chain via the break of acyl-oxygen bond of CL.
The ring-opening polymerization of ε-caprolactone (CL) initiated by novel single lanthanide tris(4-tert-butylphenolate)s [Ln(OTBP)3] is reported. Single-component La(OTBP)3 can effectively prepare polycaprolactone (PCL) with over 90% yield and viscosity average molecular weight about 60×103 under quite mild conditions:molar ratio of CL to initiator is 1000, 60℃, 2 h in toluene. Mechanism study indicates that the monomer inserts into the growing chain via the break of acyl-oxygen bond of CL.
2003, 14(10): 1024-1026
Abstract:
A new fluorescent probe for lead ions, p-nitrophenyl 3H-phenoxazin-3-one-7-yl phosphoric acid (NPPA), has been synthesized by linking resorufin (serving as a fluorophore and electron acceptor) to p-nitrophenol (serving as a fluorescence quencher and electron donor) through phosphodiester bonds. When NPPA was irradiated with light, intramolecular fluorescence self-quenching took place due to the PET (photoinduced electron transfer) from the donor to the acceptor. However, upon addition of PbⅡ, the phosphate ester bonds in the probe were cleaved and the fiuorophore was released, accompanying the retrievement of fluorescence.
A new fluorescent probe for lead ions, p-nitrophenyl 3H-phenoxazin-3-one-7-yl phosphoric acid (NPPA), has been synthesized by linking resorufin (serving as a fluorophore and electron acceptor) to p-nitrophenol (serving as a fluorescence quencher and electron donor) through phosphodiester bonds. When NPPA was irradiated with light, intramolecular fluorescence self-quenching took place due to the PET (photoinduced electron transfer) from the donor to the acceptor. However, upon addition of PbⅡ, the phosphate ester bonds in the probe were cleaved and the fiuorophore was released, accompanying the retrievement of fluorescence.
2003, 14(10): 1027-1028
Abstract:
A novel pregnane glycoside, biondianoside E, was isolated from the roots of Biondia chinensis. By the spectroscopic and chemical methods, this structure was elucidated as 3β, 5β, 14β, 20S, 21-pentahydroxypregnane 3-O-β-D-glucopyranosyl-(1→4)-β-D-cymaropyranoside.
A novel pregnane glycoside, biondianoside E, was isolated from the roots of Biondia chinensis. By the spectroscopic and chemical methods, this structure was elucidated as 3β, 5β, 14β, 20S, 21-pentahydroxypregnane 3-O-β-D-glucopyranosyl-(1→4)-β-D-cymaropyranoside.
2003, 14(10): 1029-1032
Abstract:
Two new monoterpene diglycosides, wincaloside A (1) and wincaloside B (2), along with loganin (3) were isolated from the stem barks of Winchia calophylla A. DC. The structures of 1 and 2 were established by spectroscopic and chemical methods.
Two new monoterpene diglycosides, wincaloside A (1) and wincaloside B (2), along with loganin (3) were isolated from the stem barks of Winchia calophylla A. DC. The structures of 1 and 2 were established by spectroscopic and chemical methods.
2003, 14(10): 1033-1036
Abstract:
One new A-type proanthocyanidin trimer, lindetarmin trimer, was isolated from the stems of Lindera aggregata (Sims) Kosterm.. Its structure was elucidated by spectral and chemical methods.
One new A-type proanthocyanidin trimer, lindetarmin trimer, was isolated from the stems of Lindera aggregata (Sims) Kosterm.. Its structure was elucidated by spectral and chemical methods.
2003, 14(10): 1037-1040
Abstract:
Two new sterols were isolated from bulbs of Bolbostemma paniculatum (Maxim.) Franquet. Their structures were elucidated as stigmasta-7, 22, 25-triene-3-O-nonadecanoic acid ester (1) and stigmasta-7, 22, 25-triene-3-O-β-D-(6'-palmitoyl) glucopyranoside (2) by chemicaland spectroscopic methods.
Two new sterols were isolated from bulbs of Bolbostemma paniculatum (Maxim.) Franquet. Their structures were elucidated as stigmasta-7, 22, 25-triene-3-O-nonadecanoic acid ester (1) and stigmasta-7, 22, 25-triene-3-O-β-D-(6'-palmitoyl) glucopyranoside (2) by chemicaland spectroscopic methods.
2003, 14(10): 1041-1044
Abstract:
Four new oleanane triterpene saponins were isolated and purified from the whole plant of Clinopodium urticifolium. They were 3β, 16β, 23, 28-tetrahydroxyoleana-9 (11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→2)]-[β-D-glucopyranosyl-(1→3)]-β-D-fucopyranoside 1;3β, 16β, 21β, 23, 28-pentahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→2)]-[β-D-glucopyranosyl-(1→3)]-β-D-fucopyranoside 2;3β, 16β, 23, 28-tetrahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl-(1→3)]-[β-D-glucopyranosyl-(1→2)]-β-D-fucopyranoside 3;3β, 16β, 23, 28-tetrahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-gluco-pyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl-(1→3)]-[β-D-glucopyranosyl-(1→2)]-β-D-fucopyranoside 4. Their structures were elucidated on the basis of interpretation of NMR and MS data and from chemical evidence.
Four new oleanane triterpene saponins were isolated and purified from the whole plant of Clinopodium urticifolium. They were 3β, 16β, 23, 28-tetrahydroxyoleana-9 (11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→2)]-[β-D-glucopyranosyl-(1→3)]-β-D-fucopyranoside 1;3β, 16β, 21β, 23, 28-pentahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→2)]-[β-D-glucopyranosyl-(1→3)]-β-D-fucopyranoside 2;3β, 16β, 23, 28-tetrahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl-(1→3)]-[β-D-glucopyranosyl-(1→2)]-β-D-fucopyranoside 3;3β, 16β, 23, 28-tetrahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-gluco-pyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl-(1→3)]-[β-D-glucopyranosyl-(1→2)]-β-D-fucopyranoside 4. Their structures were elucidated on the basis of interpretation of NMR and MS data and from chemical evidence.
2003, 14(10): 1045-1047
Abstract:
A new brominated phenylpropylaldehyde and its dimethyl acetal together with a new natural brominated phenol were isolated from Rhodomela confervoides. Their structrues were elucidated as 2-methyl-3-(2,3-di bromo-4,5-dihydroxyphenyl)propylaldehyde, 2-methyl-3-(2,3-di-bromo-4,5-dihydroxyphenyl) propylaldehyde dimethyl acetal and 3-bromo-4,5-dihydroxybenzoic acid methyl ester by spectroscopic techniques including IR, HRFABMS, 1D and 2DNMR experiments.
A new brominated phenylpropylaldehyde and its dimethyl acetal together with a new natural brominated phenol were isolated from Rhodomela confervoides. Their structrues were elucidated as 2-methyl-3-(2,3-di bromo-4,5-dihydroxyphenyl)propylaldehyde, 2-methyl-3-(2,3-di-bromo-4,5-dihydroxyphenyl) propylaldehyde dimethyl acetal and 3-bromo-4,5-dihydroxybenzoic acid methyl ester by spectroscopic techniques including IR, HRFABMS, 1D and 2DNMR experiments.
2003, 14(10): 1048-1050
Abstract:
Cararosinol A, a new stilbene tetramer, was isolated from Caragana rosea. Itsstructure has been established on the basis of spectroscopic evidence.
Cararosinol A, a new stilbene tetramer, was isolated from Caragana rosea. Itsstructure has been established on the basis of spectroscopic evidence.
2003, 14(10): 1051-1053
Abstract:
A flow injection procedure for the determination of calf thymus DNA (CT DNA) over the range 2.1×10-6~2.1×10-1 μg mL-1 is described, based on measurement of the enhanced chemiluminescence emission of rhodamine B-Ce(Ⅳ) system, activated by imidazole-HCl buffer solution. This method is highly sensitive, with the linearity range broadened to five orders of magnitude. It has been applied to determine CT DNA in synthetic sample with satisfactory results.
A flow injection procedure for the determination of calf thymus DNA (CT DNA) over the range 2.1×10-6~2.1×10-1 μg mL-1 is described, based on measurement of the enhanced chemiluminescence emission of rhodamine B-Ce(Ⅳ) system, activated by imidazole-HCl buffer solution. This method is highly sensitive, with the linearity range broadened to five orders of magnitude. It has been applied to determine CT DNA in synthetic sample with satisfactory results.
2003, 14(10): 1054-1057
Abstract:
The interaction of the anticancer drag hypocrellin B (HB) or the mono-cysteine substituted hypocrellin B (MCHB) and calf thymus deoxyribonucleic acid (CT-DNA) has been investigated using spectral methods. The results of UV-visible spectra show that the HB and MCHB could intercalate into the base-stacking domain of the CT-DNA double helix. The studies of fluorescence spectra and circular dichroism(CD) spectra also support the interacalation mechanism.
The interaction of the anticancer drag hypocrellin B (HB) or the mono-cysteine substituted hypocrellin B (MCHB) and calf thymus deoxyribonucleic acid (CT-DNA) has been investigated using spectral methods. The results of UV-visible spectra show that the HB and MCHB could intercalate into the base-stacking domain of the CT-DNA double helix. The studies of fluorescence spectra and circular dichroism(CD) spectra also support the interacalation mechanism.
2003, 14(10): 1058-1061
Abstract:
The effect of low energy electron (LEE) exposure on ISS, including on the sputter peak and scatter peak as well as on ion neutralization, has been investigated for different samples.Some new results are discussed.
The effect of low energy electron (LEE) exposure on ISS, including on the sputter peak and scatter peak as well as on ion neutralization, has been investigated for different samples.Some new results are discussed.
2003, 14(10): 1062-1065
Abstract:
Studies on nonlinear behavior at oil/water interface membrane were performed. This system showed rhythmic oscillations and chaos of electrical potential in a given concentration domain. The nonlinear behavior response at the liquid membrane apparently resembled that of biological chemoreceptive membrane. The possibility of developing a new type of chemical sensor with the ability to simulate substance equilibrium in living organisms was suggested in the paper.
Studies on nonlinear behavior at oil/water interface membrane were performed. This system showed rhythmic oscillations and chaos of electrical potential in a given concentration domain. The nonlinear behavior response at the liquid membrane apparently resembled that of biological chemoreceptive membrane. The possibility of developing a new type of chemical sensor with the ability to simulate substance equilibrium in living organisms was suggested in the paper.
2003, 14(10): 1066-1069
Abstract:
Comparatively high CH3OH selectivity (60.0%) and yield (6.7%) were obtained on MoOx/(LaCoO3+Co3O4) catalysts in selective oxidation of methane to methanol using molecular oxygen as oxidant. The interaction between MoOx and La-Co-oxide modified the molecular structure of molybdenum oxide and the ratio of O-/O2- on the catalyst surface, which controlled the catalytic performance of MoOx/(LaCoO3+Co3O4) catalysts.
Comparatively high CH3OH selectivity (60.0%) and yield (6.7%) were obtained on MoOx/(LaCoO3+Co3O4) catalysts in selective oxidation of methane to methanol using molecular oxygen as oxidant. The interaction between MoOx and La-Co-oxide modified the molecular structure of molybdenum oxide and the ratio of O-/O2- on the catalyst surface, which controlled the catalytic performance of MoOx/(LaCoO3+Co3O4) catalysts.
2003, 14(10): 1070-1072
Abstract:
Oxidation of n-butanol and 2-pentanol using molecular oxygen in supercritical (SC) CO2 with and without co-solvent is investigated. The results showed that the reaction selectivity is high when the reaction is carried out in SC CO2. It has been observed that co-solvent affects conversion and selectivity of the reaction considerably.
Oxidation of n-butanol and 2-pentanol using molecular oxygen in supercritical (SC) CO2 with and without co-solvent is investigated. The results showed that the reaction selectivity is high when the reaction is carried out in SC CO2. It has been observed that co-solvent affects conversion and selectivity of the reaction considerably.
2003, 14(10): 1073-1076
Abstract:
C4'-H bond dissociation enthalpies of nucleosides were predicted using theoretical methods to a precision of 1-2 Kcal/mol. It was found that the stability of the C4'nucleoside radical is slightly dependent on the base. The orders of stability are dA < dG < dT < dC for deoxynucleosides and U < G < A≈C for nucleosides.
C4'-H bond dissociation enthalpies of nucleosides were predicted using theoretical methods to a precision of 1-2 Kcal/mol. It was found that the stability of the C4'nucleoside radical is slightly dependent on the base. The orders of stability are dA < dG < dT < dC for deoxynucleosides and U < G < A≈C for nucleosides.
2003, 14(10): 1077-1080
Abstract:
In order to study synergism of the mixed suffactants system with molecular exchanging energy (ε), the Lennard-Jones formula has been firstly introduced to evaluate the ε of the mixed system, CH3(CH2)nOSO3-/CH3(CH2)nN+(CH3)3, directly from their molecular structure. The comparison of the calculated and the observed results showed that this method is practical.
In order to study synergism of the mixed suffactants system with molecular exchanging energy (ε), the Lennard-Jones formula has been firstly introduced to evaluate the ε of the mixed system, CH3(CH2)nOSO3-/CH3(CH2)nN+(CH3)3, directly from their molecular structure. The comparison of the calculated and the observed results showed that this method is practical.
2003, 14(10): 1081-1084
Abstract:
The adsorption and dissociation of methane and carbon dioxide for reforming on nickel catalyst were extensively investigated by TPSR and TPD experiments. It showed that the decomposition of methane results in the formation of at least three kinds of surface carbon species on supported nickel catalyst, while CO2 adsorbed on the catalyst weakly and only existed in one kind of adsorption state. Then the mechanism of interaction between the species dissociated from CH4 and CO2 during reforming was proposed.
The adsorption and dissociation of methane and carbon dioxide for reforming on nickel catalyst were extensively investigated by TPSR and TPD experiments. It showed that the decomposition of methane results in the formation of at least three kinds of surface carbon species on supported nickel catalyst, while CO2 adsorbed on the catalyst weakly and only existed in one kind of adsorption state. Then the mechanism of interaction between the species dissociated from CH4 and CO2 during reforming was proposed.
2003, 14(10): 1085-1088
Abstract:
The photoinduced bulk polymerization of a reactive-hindered amine light stabilizers(r-HALS), 4-acryloyl-2, 2, 6, 6-tetramethylpiperidinyl (ATMP), was performed at 80℃ by using a DPC technique. An unique periodic exponential attenuation-type oscillating curve was found when the polymerization was carried out in air, but this phenomenon was not found in nitrogen.It is supposed that this unique kinetic performance may be attributed to nitroxyl radicals that are produced in situ from the oxidation of ATMP. ATMP polymer with narrow polydispersity (d=1.03) can be obtained by photoinduced solution polymerization of ATMP. The signal detected in ESR may be assigned to the nitroxyl radicals in the matrix of ATMP polymer. Since this kind of recycling of nitroxyl radicals is well documented for the photostabilizing mechanism of HALS, the present results may serve as a kinetic evidence for this mechanism.
The photoinduced bulk polymerization of a reactive-hindered amine light stabilizers(r-HALS), 4-acryloyl-2, 2, 6, 6-tetramethylpiperidinyl (ATMP), was performed at 80℃ by using a DPC technique. An unique periodic exponential attenuation-type oscillating curve was found when the polymerization was carried out in air, but this phenomenon was not found in nitrogen.It is supposed that this unique kinetic performance may be attributed to nitroxyl radicals that are produced in situ from the oxidation of ATMP. ATMP polymer with narrow polydispersity (d=1.03) can be obtained by photoinduced solution polymerization of ATMP. The signal detected in ESR may be assigned to the nitroxyl radicals in the matrix of ATMP polymer. Since this kind of recycling of nitroxyl radicals is well documented for the photostabilizing mechanism of HALS, the present results may serve as a kinetic evidence for this mechanism.
2003, 14(10): 1089-1092
Abstract:
A new molecular conductor (PyH)[Ni(dmit)2]2 (dmit=4, 5-dimercapto-1, 3-dithiole-2-thione) has been prepared and its crystal structure has been determined. Crystallographic parameters for (PyH)[Ni(dmit)2]2:C17H6NNi2S20;triclinic system;P-1 space group;a=5.9227 (4), b=8.2279 (6), c=16.7535 (9)Å, α=90.233 (5)°, β=92.107 (6)°, γ=104.654 (6) °;V=789.25 (9) Å3;Z=1;Dc=2.068 g/cm3;F(000)=491. The conductivity at one direction on (001) plane at room temperature was measured to be 0.13 Ω-1·cm-1. The resistivity-temperature curve in the temperature range of 90~290 K shows that this compound behaves as a semiconductor.
A new molecular conductor (PyH)[Ni(dmit)2]2 (dmit=4, 5-dimercapto-1, 3-dithiole-2-thione) has been prepared and its crystal structure has been determined. Crystallographic parameters for (PyH)[Ni(dmit)2]2:C17H6NNi2S20;triclinic system;P-1 space group;a=5.9227 (4), b=8.2279 (6), c=16.7535 (9)Å, α=90.233 (5)°, β=92.107 (6)°, γ=104.654 (6) °;V=789.25 (9) Å3;Z=1;Dc=2.068 g/cm3;F(000)=491. The conductivity at one direction on (001) plane at room temperature was measured to be 0.13 Ω-1·cm-1. The resistivity-temperature curve in the temperature range of 90~290 K shows that this compound behaves as a semiconductor.
2003, 14(10): 1093-1096
Abstract:
A dye-sensitized TiO2 solid solar cell, which contains poly(4-vinylphenyloxy-methyltriphenylamine) in hole transport layer (HTL) doped with LiSCN and methyl-hexyl-imidazolium iodide (MHIml), was prepared. The solar cell shows that the conversion efficiencyis 0.59%, Jsc is 3.03mA/cm2, and Voc is 0.53V at 1 sun light intensity.
A dye-sensitized TiO2 solid solar cell, which contains poly(4-vinylphenyloxy-methyltriphenylamine) in hole transport layer (HTL) doped with LiSCN and methyl-hexyl-imidazolium iodide (MHIml), was prepared. The solar cell shows that the conversion efficiencyis 0.59%, Jsc is 3.03mA/cm2, and Voc is 0.53V at 1 sun light intensity.
2003, 14(10): 1097-1100
Abstract:
A novel negatively charged biomolecule-cordycepin has been intercalated within the gallery spaces of [Mg-Al-NO3]. Results of TEM, PXRD and FT-IR spectroscopy confirmed that cordycepin could be intercalated into [Mg-Al-NO3] interlayers as the charge-compensating species.Initial studies suggest that the new bioinorganic nanocomposite may be used as a novel inorganic reservoir or carrier of pharmaceutically active compounds.
A novel negatively charged biomolecule-cordycepin has been intercalated within the gallery spaces of [Mg-Al-NO3]. Results of TEM, PXRD and FT-IR spectroscopy confirmed that cordycepin could be intercalated into [Mg-Al-NO3] interlayers as the charge-compensating species.Initial studies suggest that the new bioinorganic nanocomposite may be used as a novel inorganic reservoir or carrier of pharmaceutically active compounds.
