A new hexanuclear silver（I） compound containing thiosemicarbazones with groups of 1-naphthalene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence...A new hexanuclear silver（I） compound containing thiosemicarbazones with groups of 1-naphthalene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence spectrum. The title compound crystallizes in monoclinic, space group P21/c with a = 16.101（4）, b = 24.855（7）, c = 14.492（4） A, β = 109.730（5）, V = 5459（3） A3, C90H102Ag6N2406S6, Mr= 2455.54, Dc= 1.494 g/cm3,μ（MoKa） = 1.228 mm^-1, F（000） = 2472, Z = 2, the final R = 0.0761 and wR = 0.1507 for 5258 observed reflections （I〉 2α（I））. In the structure, the S atom of ligand L serves as a triply bridged chelator to connect the six silver atoms into a Ag6L6 cluster. Luminescence investigation reveals that the compound exhibits two ligand-independent cluster-centered electron transfer bands and one ligand-dependent charge transfer band.展开更多
Supramolecular assembly is regarded as an effective strategy to endow metal clusters with rich and unique photophysical properties.However,the detailed mechanisms and influential factors for intercluster assemblies an...Supramolecular assembly is regarded as an effective strategy to endow metal clusters with rich and unique photophysical properties.However,the detailed mechanisms and influential factors for intercluster assemblies and their effects on luminescent properties remain unclear to date.In this work,we constructed a series of spirocyclic nonanuclear silver cluster compounds with varying alkyl chain lengths,which demonstrated distinct supramolecular assembly behaviors depending on temperature,concentration,and solvent polarity.展开更多
A new Er^3＋/Yb^3＋ co-doped phosphate glass has been prepared, which exhibits good chemical durability and spectral properties. Planar graded index waveguides have been fabricated in the glass by Ag^＋-Na^＋ ion exch...A new Er^3＋/Yb^3＋ co-doped phosphate glass has been prepared, which exhibits good chemical durability and spectral properties. Planar graded index waveguides have been fabricated in the glass by Ag^＋-Na^＋ ion exchange in a mixed melt of silver nitrate and potassium nitrate,Ion exchange is carried out by varying the process parameters such as temperature, diffusion time, and molten salt compositions. The diffusion parameters, diffusion coefficients, and activation energy are determined by the guidelines of fabricated wavegnides, which are determined by tile input prism coupling technique.展开更多
基金supported by the Postdoctoral Science Foundation of Central South University
文摘A new hexanuclear silver（I） compound containing thiosemicarbazones with groups of 1-naphthalene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence spectrum. The title compound crystallizes in monoclinic, space group P21/c with a = 16.101（4）, b = 24.855（7）, c = 14.492（4） A, β = 109.730（5）, V = 5459（3） A3, C90H102Ag6N2406S6, Mr= 2455.54, Dc= 1.494 g/cm3,μ（MoKa） = 1.228 mm^-1, F（000） = 2472, Z = 2, the final R = 0.0761 and wR = 0.1507 for 5258 observed reflections （I〉 2α（I））. In the structure, the S atom of ligand L serves as a triply bridged chelator to connect the six silver atoms into a Ag6L6 cluster. Luminescence investigation reveals that the compound exhibits two ligand-independent cluster-centered electron transfer bands and one ligand-dependent charge transfer band.
基金National Natural Science Foundation of China(NNSFCgrant nos.22025105,21772111,21821001,and 91956125).
文摘Supramolecular assembly is regarded as an effective strategy to endow metal clusters with rich and unique photophysical properties.However,the detailed mechanisms and influential factors for intercluster assemblies and their effects on luminescent properties remain unclear to date.In this work,we constructed a series of spirocyclic nonanuclear silver cluster compounds with varying alkyl chain lengths,which demonstrated distinct supramolecular assembly behaviors depending on temperature,concentration,and solvent polarity.
基金the Optical Science and Technology Program of Shanghai (No. 00261002)
文摘A new Er^3＋/Yb^3＋ co-doped phosphate glass has been prepared, which exhibits good chemical durability and spectral properties. Planar graded index waveguides have been fabricated in the glass by Ag^＋-Na^＋ ion exchange in a mixed melt of silver nitrate and potassium nitrate,Ion exchange is carried out by varying the process parameters such as temperature, diffusion time, and molten salt compositions. The diffusion parameters, diffusion coefficients, and activation energy are determined by the guidelines of fabricated wavegnides, which are determined by tile input prism coupling technique.
