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Transformation of Regioregular Organotitanium Polymers into Group 16 Heterole‐Containing π‐Conjugated Materials
Author(s) -
Nishiyama Hiroki,
Kino Tomoko,
Tomita Ikuyoshi
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100751
Subject(s) - conjugated system , thiophene , polymer , polymer chemistry , materials science , chloride , photochemistry , chemistry , organic chemistry , composite material
Regioregular organometallic polymers with titanacyclopentadiene units, obtained from terminal diynes and a low‐valent titanium complex, were subjected to reactions with disulfur dichloride and selenium (I) chloride to give π‐conjugated polymers with thiophene and selenophene units in the main chain in 63% and 86% yields. Their number‐average molecular weights were estimated as 4300 and 5700, respectively. Both polymers were found to be fully π‐conjugated and their HOMO energy levels were remarkably high (–5.3 eV and –5.0 eV for thiophene‐ and selenophene‐containing polymers, respectively) as supported by their UV‐vis absorption spectra and CV analyses.