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Electro‐optical Properties of Neutral and Radical Ion Thienosquaraines
Author(s) -
Maltese Vito,
Cospito Sante,
Beneduci Amerigo,
De Simone Bruna Clara,
Russo Nino,
Chidichimo Giuseppe,
Janssen René A. J.
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201601281
Subject(s) - electrochromism , cyclic voltammetry , electrochemistry , redox , ion , photochemistry , chemistry , absorption spectroscopy , absorption (acoustics) , radical ion , spectral properties , panchromatic film , materials science , analytical chemistry (journal) , electrode , inorganic chemistry , organic chemistry , computational chemistry , optics , physics , composite material , image resolution
Thienosquaraines are an interesting class of electroactive dyes that are useful for applications in organic electronics. Herein, the redox chemistry and electrochromic response of a few newly synthesized thienosquaraines are presented. These properties are compared to those of the commercial 2,4‐bis[4‐( N , N ‐diisobutylamino)‐2,6‐dihydroxyphenyl]squaraine. The stability of the radical ions formed in electrochemical processes strongly affects these properties, as shown by cyclic voltammetry, in situ spectroelectrochemistry, and quantum chemical calculations. Furthermore, all of the dyes show aggregation tendency resulting in panchromatic absorption covering the whole UV/Vis spectral range.