1,3‐Bis(2‐thienylmethylene)1‐1 H ,3 H 1‐thieno[3,4‐ c ]thiophene: A Precursor for a New Low Band Gap Polymer

Autor:	Jean-Luc Brédas, Michael Hanack, Christine Adant, Ursula Röhrig, J.M. Toussaint, U. Schmid
Rok vydání:	1993
Předmět:	chemistry.chemical_classification Band gap Condensation Sulfoxide Polymer Photochemistry Inorganic Chemistry Pseudopotential chemistry.chemical_compound chemistry Thiophene Physical chemistry Cyclic voltammetry Electronic band structure
Zdroj:	Chemische Berichte. 126:1487-1491
ISSN:	0009-2940
DOI:	10.1002/cber.19931260633
Popis:	A new precursor, 1,3-bis(2-thienylmethylene)1-1H,3H1-thieno-[3,4-c]thiophene(9), for polyarenemethylenes (PAM), which are predicted to be low band gap polymers, is obtained by a Knoevenagel-type condensation of 1H,3H1-thieno[3,4-c]thiophene 2-oxide (7) with 2-thiophenecarbaldehyde followed by reduction of the intermediate sulfoxide 8 with 2-chloro-1,3,2-benzodioxaphosphole. Several investigations with cyclic voltammetry and UV-Vis-NIR spectroelectrochemistry (SEC) are carried out on 9. The experimental data are compared with the results of electronic band structure calculated on the basis of an MNDO-optimized geometric structure by VEH pseudopotential method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6e8ec89140a483492909ecb3adaefd18 https://doi.org/10.1002/cber.19931260633 Zobrazit plný text záznamu Plný text