2004 Fiscal Year Final Research Report Summary
Development of Environment Responsive Properties of Luminescent Platinum Complexes Having Controlled Nano Structures
| Project/Area Number |
15350034
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic chemistry
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| Research Institution | Nara Women's University |
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Principal Investigator |
KATO Masako Nara Women's University, Graduate School of Humanities and Sciences, Associate Professor, 大学院・人間文化研究科, 助教授 (80214401)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Toshiharu Nara Women's University, Faculty of Science, Professor, 理学部, 教授 (60110805)
MATSUOKA Yuki Nara Women's University, Faculty of Science, Research Associate, 理学部, 助手 (20324957)
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| Project Period (FY) |
2003 – 2004
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| Keywords | diimine-platinum complex / vapochromism / crystal structure / luminescent metal complex / substituted bipyridine / emission spectrum / X-ray crystallography / metal-metal interaction |
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| Research Abstract |
1) Environment Responsive Properties of (Bipyridine)platinum(II) Complexes Containing Arrangement-controlling Substituents. Several new platinum complexes containing substituted bipyridine ligands, [PtX_2(R_2bpy)] (X=Cl^-, CN^-, R=(CH_2)_nCH_3 [n= 6-10], COOH) have been synthesized in order to control nano-structures sophisticatedly. [Pt(CN)_2(dnbpy)] (dnbpy=4,4'-dinonyl-2,2'-bipyridine) exhibited vapochromic behavior in the solid states and sensitive concentration dependence of luminescence in solution. For the complex containing carboxyl groups, pH-dependent chromism was found. The X-ray analysis revealed that three-dimensional network structure having large cavities was constructed with hydrogen bonds and Pt-Pt interactions. The relationship between the network structural change and the chromism was discussed.
2) The Mechanism of the Vapochromic Behavior of a Dinuclear Bipyridine-platinum(ll) Complex. The dinuclear platinum(II) complex, syn-[Pt_2(pyt)_2(bpy)_2](PF_6)_2 (pyt=pyridine-2-thiolate ion, bpy=2,2'-bipyridine) exhibits a remarkable change in its luminescence by sensing organic vapors. Mechanistic studies of the vapochromism have been carried out on the basis of the structural and spectroscopic investigations of related complexes. It is suggested that the head-to-head arrangement of the syn isomer is essential to the vapochromic behavior.
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