Electro-optical Properties of Neutral and Radical Ion Thienosquaraines.

Authors :: Maltese V
Cospito S
Beneduci A
De Simone BC
Russo N
Chidichimo G
Janssen RA
Source :: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2016 Jul 11; Vol. 22 (29), pp. 10179-86. Date of Electronic Publication: 2016 Jun 23.
Publication Year :: 2016
Abstract: 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.<br /> (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)