Chiral nano-silver cluster material with high stability, strong luminescence and high quantum yield

A technology of nano-silver clusters and chirality, which is applied in the cross field of coordination chemistry and nano-materials, can solve problems such as chiral nano-silver clusters that have not been seen, and achieve good promotion and application value, high stability, and high chiral luminescence characteristics. Effect

Active Publication Date: 2019-10-15
ZHENGZHOU UNIV
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  • Abstract
  • Description
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Problems solved by technology

There are no related reports on chiral silver nanoclusters

Method used

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  • Chiral nano-silver cluster material with high stability, strong luminescence and high quantum yield
  • Chiral nano-silver cluster material with high stability, strong luminescence and high quantum yield
  • Chiral nano-silver cluster material with high stability, strong luminescence and high quantum yield

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Embodiment 1

[0024] Embodiment 1: the synthesis of nano-silver cluster material of the present invention

[0025] Dissolve 19mg (0.1mmol) (S / R)-4-phenylthiazolidine-2-thione (PL / PD) in a mixed solution of 3mL DMAc and 1mL acetonitrile, stir rapidly; add 19mg (0.1mmol) AgNO 3 Stir until the solution is clear, then stir and react at room temperature for 5 minutes. After the reaction, place the clear solution at room temperature to avoid light and volatilize. After 2 days, light yellow blocky crystals are obtained. The yield is 76%. Filter, wash with acetonitrile, and dry at room temperature Used to test materials for their properties.

[0026] Get the nano-silver cluster material of the present invention that embodiment 1 makes and do further characterization, its process is as follows:

[0027] (1) Determination of crystal structure

[0028] The X-ray single crystal diffraction data of the complexes were measured on a Rigaku XtaLAB Pro single crystal diffractometer with a single crystal s...

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Abstract

The invention discloses a chiral nano-silver cluster material with a high stability, a strong luminescence and a high quantum yield, and belongs to the field of intersection of coordination chemistryand nano-materials. The enantiomer of the chiral nano-silver cluster adopts a chiral ligand (S/R)-4-phenylthiazolidine-2-thione (PL/PD) as a protective ligand, and the chiral silver nano-cluster material with the high yield and excellent luminescent properties is synthesized by a simple room temperature volatilization one-pot process. The chemical formula of the enantiomeric cluster is C54H48Ag6N6S12 (called Ag6PL6/PD6 for short), the enantiomeric cluster belongs to the monoclinic system, and the space group is the chiral space group P213. The cluster has strong brown-yellow fluorescence at room temperature, and the fluorescence quantum yield reaches up to 97%, and is the highest quantum yield of reported silver nanoclusters with a precise atom structure; the structure of the material canbe stabilized at 160 DEG C, and still maintains luminescence; and the chiral structure and strong luminescent properties of the material make the cluster structure have a strong circularly polarized luminescence (CPL) property. The silver nano-cluster has the advantages of chiral structure, high stability, strong luminescence and high quantum yield, so the silver nano-cluster has excellent application prospects in fields of luminescent materials and chiral optical materials.

Description

technical field [0001] The invention belongs to the intersection field of coordination chemistry and nanometer materials, and mainly synthesizes a chiral nanometer silver cluster material with high stability, strong luminescence and high quantum yield. Background technique [0002] Atomically precise silver nanoclusters are a class of clusters with precise atomic structures whose outer layer is protected by organic ligands and whose inner core is formed by 3 or more metal silver atoms through argentophilic interaction. compound. Nanocluster is a state of matter between atoms, molecules and bulk materials, and is a bridge connecting atoms, molecules and macroscopic substances. Its size is generally on the order of nanometers, and it is often accompanied by quantum confinement effects. Many new phenomena and properties. Its excellent photophysical properties and its potential applications in catalysis, bioimaging and other fields have become a research hotspot in materials a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/10C07D277/16C09K11/06
CPCC07B2200/07C07B2200/13C07D277/16C07F1/005C09K11/06C09K2211/188
Inventor 臧双全韩振董喜燕
Owner ZHENGZHOU UNIV
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