Photophysical and Theoretical Studies on Luminescent Tetranuclear Coinage Metal Building Blocks
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- 作者：Eduardo J. Ferná ; ndez ; Antonio Laguna ; José ; M. Ló ; pez-de-Luzuriaga ; Miguel Monge ; Manuel Montiel ; M. Elena Olmos ; and Marí ; a Rodrí ; guez-Castillo
- 刊名：Organometallics
- 出版年：2006
- 出版时间：July 17, 2006
- 年：2006
- 卷：25
- 期：15
- 页码：3639 - 3646
- 全文大小：347K
- 年卷期：v.25,no.15(July 17, 2006)
- ISSN：1520-6041
文摘
The synthesis, structural characterization, and the study of the photophysical properties of complexes[Au2Ag2(C6F5)4(N
CCH3)2]n (1) and [Au2Cu2(C6F5)4(NCCH3)2]n (2) have been carried out. The crystalstructure of both complexes consists of polymeric chains formed by repetition of Au2Ag2 or Au2Cu2units built up by metallophilic Au(I)···M(I) interactions that are linked through Au(I)···Au(I) interactions.Complexes 1 and 2 are brightly luminescent in the solid state at room temperature and at 77 K withlifetimes in the nanosecond range. Both compounds 1 and 2 undergo oligomerization in solution, asobserved through UV-vis and excitation spectra in acetonitrile solutions at high concentrations. Thus,a correlation between the excitation spectra in solution at different concentrations and the absorptionspectra in the solid state for complex 1 can be established. Time-dependent DFT calculations agree wellwith the experimental results and support the idea of that the origin of the luminescence of these complexesarises from orbitals located in the tetranuclear Au2M2 units.
CCH3)2]n (1) and [Au2Cu2(C6F5)4(NCCH3)2]n (2) have been carried out. The crystalstructure of both complexes consists of polymeric chains formed by repetition of Au2Ag2 or Au2Cu2units built up by metallophilic Au(I)···M(I) interactions that are linked through Au(I)···Au(I) interactions.Complexes 1 and 2 are brightly luminescent in the solid state at room temperature and at 77 K withlifetimes in the nanosecond range. Both compounds 1 and 2 undergo oligomerization in solution, asobserved through UV-vis and excitation spectra in acetonitrile solutions at high concentrations. Thus,a correlation between the excitation spectra in solution at different concentrations and the absorptionspectra in the solid state for complex 1 can be established. Time-dependent DFT calculations agree wellwith the experimental results and support the idea of that the origin of the luminescence of these complexesarises from orbitals located in the tetranuclear Au2M2 units.