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题名: Experimental and Theoretical Study on the Photophysical Properties of 90 degrees and 60 degrees Bimetallic Platinum Complexes
作者: Chen, Jun-Sheng1, 2;  Zhao, Guang-Jiu1;  Cook, Timothy R.3;  Sun, Xiao-Fei1;  Yang, Song-Qiu1;  Zhang, Ming-Xing1;  Han, Ke-Li1;  Stang, Peter J.3
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2012-10-11
DOI: 10.1021/jp3072475
卷: 116, 期:40, 页:9911-9918
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The 90 degrees and 6 degrees bimetallic platinum complexes with special structures are widely used in coordination-driven self-assembled metallosupramolecular architectures, and these complexes are the key components of triangular, rectangular, and polygonal metallacycle and metallocage supramolecules. Therefore, spectroscopic techniques and quantum chemistry calculations were employed in this article to investigate the photophysical properties of these bimetallic platinum complexes. Compared with spectra for the ligands, the absorption spectra of these Pt complexes are red-shifted, and the fluorescence spectra become wider and are also red-shifted. Moreover, the reasons for the low fluorescence quantum yields and short fluorescence lifetimes of these compounds were investigated using quantum chemistry calculations. We demonstrate that the fluorescent states of the bimetallic platinum complexes can be considered as local excited states, and that they possess a ligand-centered pi-pi* transition feature. Meanwhile, the platinum metals act as perturbation for these transitions, whereas the nonfluorescent states are classified as intramolecular charge-transfer states. Furthermore, a new fluorescence modulation mechanism is developed to explain the different emission processes of these complexes with different ligands.
关键词[WOS]: DENSITY-FUNCTIONAL THEORY ;  CHARGE-TRANSFER ;  ELECTRONIC-STRUCTURE ;  MOLECULAR DESIGN ;  FLUORESCENCE ;  STATE ;  POLYMETALLAYNES ;  RECTANGLES ;  ASSEMBLIES ;  TURBOMOLE
语种: 英语
WOS记录号: WOS:000309648800016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143082
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA

Recommended Citation:
Chen, Jun-Sheng,Zhao, Guang-Jiu,Cook, Timothy R.,et al. Experimental and Theoretical Study on the Photophysical Properties of 90 degrees and 60 degrees Bimetallic Platinum Complexes[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2012,116(40):9911-9918.
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