Polythiophene-based conjugated polyelectrolyte: Optical properties and association behavior in solution

0443715 - ÚMCH 2016 RIV CH eng J - Journal Article
Urbánek, P. - di Martino, A. - Gladyš, S. - Kuřitka, I. - Minařík, A. - Pavlova, Ewa - Bondarev, D.
Polythiophene-based conjugated polyelectrolyte: Optical properties and association behavior in solution.
Synthetic Metals. Roč. 202, April (2015), s. 16-24. ISSN 0379-6779. E-ISSN 0379-6779
R&D Projects: GA TA ČR(CZ) TE01020118; GA ČR GAP108/12/1143
Institutional support: RVO:61389013
Keywords : polyelectrolyte * conjugated polymer * UV–vis spectroscopy
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 2.299, year: 2015

Conjugated polyelectrolyte with polythiophene main chain and imidazolium side groups, poly{3-[6-(1-methylimidazolium-3-yl) hexyl]thiophene-2,5-diyl bromide}, is investigated. Polymer architecture with hydrophobic main chain and hydrophilic side groups is responsible for the inconvenient behavior of the polymer in solution. Absorption and emission characteristics and supramolecular assembling are investigated by spectroscopic, microscopic and light-scattering methods. We report significant solvatochromism which is observable by a naked eye. Water solutions and mixed solvent systems exhibit most interesting features: supramolecular assembling was investigated by DLS, AFM and TEM techniques and common spectroscopic methods such as UV–vis and fluorescence spectroscopy. Moreover, slow relaxation processes take part in water as it is evidenced by time evolution of absorption spectra. It is a result of vanishing of inter- and intramolecular interactions. These interactions are responsible for extraordinary solution behavior of the ionic polythiophene.
Permanent Link: http://hdl.handle.net/11104/0246414