title: Parallel Synthesis of photoluminescent π-conjugated polymers by polymer reactions of an organotitanium polymer with a titanacyclopentadiene unit.
abstract: A regioregular organometallic polymer with titanacyclopentadiene unit, obtained by the reaction of a 2,7-diethynylfluorene derivative and a low-valent titanium complex, is subjected to the reaction with three kinds of electrophiles (i.e., sulfur monochloride, hydrochloric acid, and dichlorophenylphosphine) to give π-conjugated polymers possessing both fluorene and building blocks originated from the transformation of the titanacycles in the main chain. For example, a phosphole-containing polymer whose number-average molecular weight is estimated as 5000 is obtained in 50% yield. The obtained thiophene, butadiene, and phosphole-containing polymers exhibit efficient photoluminescence (PL) with emission colors of blue, green, and yellow, respectively. For example, the phosphole-containing polymer exhibits yellow PL with an emission maximum (Emax ) of 533 nm and a quantum yield (Φ) of 0.37.
authors: Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta-cho 4259-G1-9, Midori-ku, Yokohama, 226-8502, Japan.
authors: Yoshimasa
authors: Y
authors: Matsumura
authors: Katsura
authors: K
authors: Fukuda
authors: Shinsuke
authors: S
authors: Inagi
authors: Ikuyoshi
authors: I
authors: Tomita
mesh_terms: D003517:Cyclopentanes / Q000737:chemistry*; D049449:Luminescence; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D003517:Cyclopentanes; D011108:Polymers; D014025:Titanium
keywords: elements-containing π-conjugated polymers; organo­metallic polymers; parallel synthesis; photoluminescence; polymer reactions