title: Synthesis and Characterization of Novel Polythiophenes Containing Pyrene Chromophores: Thermal, Optical and Electrochemical Properties.
abstract: A novel series of pyrene containing thiophene monomers TPM1-5 were synthesized and fully characterized by FTIR, MS, ¹H- and (13)C-NMR spectroscopy; their thermal properties were determined by TGA and DSC. These monomers were chemically polymerized using FeCl3 as oxidizing agent to give the corresponding oligomers TPO1-5) and they were electrochemically polymerized to obtain the corresponding polymer films deposited onto ITO. All oligomers exhibited good thermal stability, with T10 values between 255 and 299 °C, and Tg values varying from 36 to 39 °C. The monomers showed an absorption band at 345 nm due to the S0 → S2 transition of the pyrene group, whereas the fluorescence spectra showed a broad emission band arising from the "monomer" emission at 375-420 nm. The obtained polymers exhibited two absorption bands at 244 and 354 nm, due to the polythiophene and the pyrene moieties, respectively. The fluorescence spectra of polymers showed a broad "monomer" emission at 380-420 nm followed by an intense excimer emission band at 570 nm, due to the presence of intramolecular pyrene-pyrene interactions in these compounds.
authors: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria, Mexico City 04510, Mexico. biancaxvg@msn.com.
authors: Bianca X
authors: BX
authors: Valderrama-García
authors: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria, Mexico City 04510, Mexico. efrainhelio@gmail.com.
authors: Efraín
authors: E
authors: Rodríguez-Alba
authors: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria, Mexico City 04510, Mexico. erichsm536@yahoo.com.mx.
authors: Eric G
authors: EG
authors: Morales-Espinoza
authors: Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie de Coordination (LCC), 205, Route de Narbonne, Toulouse F-31077, France. kathleen.chane@lcc-toulouse.fr.|Institut National Polytechnique, Université de Toulouse, Université Paul Sabatier, Toulouse F-31077, France. kathleen.chane@lcc-toulouse.fr.
authors: Kathleen
authors: K
authors: Moineau Chane-Ching
authors: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria, Mexico City 04510, Mexico. riverage@unam.mx.
authors: Ernesto
authors: E
authors: Rivera
mesh_terms: D002712:Chlorides / Q000737:chemistry; D055664:Electrochemical Techniques; D005290:Ferric Compounds / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D011721:Pyrenes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D013876:Thiophenes / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; D005456:Fluorescent Dyes; D011108:Polymers; D011721:Pyrenes; D013876:Thiophenes; C066730:polythiophene; C030984:pyrene; C024555:ferric chloride
keywords: absorption; electrosynthesis; fluorescence; polythiophene; pyrene