Convergent synthesis of platinum-acetylide dendrimers |
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Authors: | Onitsuka Kiyotaka Fujimoto Masanori Kitajima Hotaka Ohshiro Nobuaki Takei Fumie Takahashi Shigetoshi |
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Institution: | The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan. onitsuka@sanken.osaka-u.ac.jp |
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Abstract: | An efficient convergent route to the main chain type of organometallic dendrimers, in which platinum moieties are linked by 1,3,5-triethynylbenzene, has been developed. The synthesis of platinum-acetylide dendrons involved the use of two types of trialkylsilyl groups for protection of the terminal acetylene. The platinum-acetylide dendrimers were prepared up to the third generation by reacting dendrons with a triplatinum core and a tetraplatinum core. Spectroscopic characterization and trace experiments by gel permeation chromatography indicated that the dendrimer molecules have no structural defects. Although a pi-conjugated system was used as the bridging ligand, electronic and fluorescence spectra suggested that the interaction among the platinum-acetylide moieties in the dendrimers was small. |
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Keywords: | acetylene acetylide complex dendrimers platinum |
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