title: Convergent synthesis of platinum-acetylide dendrimers.
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.
authors.affiliation: The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan. onitsuka@sanken.osaka-u.ac.jp
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Onitsuka
authors.forename: Masanori
authors.initials: M
authors.lastname: Fujimoto
authors.forename: Hotaka
authors.initials: H
authors.lastname: Kitajima
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Ohshiro
authors.forename: Fumie
authors.initials: F
authors.lastname: Takei
authors.forename: Shigetoshi
authors.initials: S
authors.lastname: Takahashi