研究目的
Investigating the dual emission properties of a cyclic hexanuclear gold(I) complex and the interplay between Au3 and Au2 ligand-supported luminophores.
研究成果
The study reveals a remarkable dual emission behavior in a cyclic hexanuclear gold(I) complex, attributed to the interplay between Au3 and Au2 ligand-supported luminophores. Theoretical calculations suggest that the luminescent properties are inherent to the Au6 skeleton, with two novel substructure-luminophores identified. This finding opens new perspectives for the design of multiple luminescent gold clusters and the development of intense luminescent molecular devices.
研究不足
The study is limited by the complexity of the Au6 skeleton and the interplay between multiple aurophilic interactions, which may affect the accuracy of theoretical predictions. The experimental conditions, such as solvent and temperature, may also influence the luminescence properties.
1:Experimental Design and Method Selection
The study involves the synthesis of a cyclic hexanuclear gold(I) complex and its photophysical characterization using UV-Vis-NIR spectrophotometry and steady-state excitation and emission spectroscopy. Theoretical calculations were performed using relativistic DFT and TD-DFT methods to understand the electronic structure and luminescence mechanism.
2:Sample Selection and Data Sources
Samples of complex 1 were prepared in CH2Cl2 at a concentration of 5.0×10-5 M. The chemical characterization of the complexes has been previously reported.
3:List of Experimental Equipment and Materials
Shimadzu UV-3600 UV-Vis-NIR spectrophotometer, HORIBA Jobin-Yvon IBH FL-322 Fluorolog 3 spectrometer equipped with a 450 W xenon arc lamp, double-grating excitation and emission monochromators, and a TBX-04 single-photon-counting detector.
4:Experimental Procedures and Operational Workflow
Absorption spectra were measured and baseline corrected. Emission and excitation spectra at room temperature were recorded and corrected for source intensity and emission spectral response. Deaerated samples were prepared by freeze-pump-thaw technique.
5:Data Analysis Methods
Relativistic density functional theory calculations were carried out using the ADF code, incorporating scalar corrections via the ZORA Hamiltonian. Geometry optimizations of both ground- and excited-states were performed without any symmetry restrain. Excitation energies were calculated via TD-DFT considering the van Leeuwen?Baerends (LB94) xc-functional.
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