Charged states in diphenylamino endcapped thiophenes with a 1,4-phenylene core: In situ electron spin resonance/ultraviolet-visible-near infrared and nuclear magnetic resonance spectroelectrochemistry and quantum chemical study

The 1,4-bis-(2-diphenylamino-thiophen-5-yl)-benzene (A), 1,4-bis-[2-(phenothiazin-10-yl)-thiophen-5-yl]-benzene (B) and 1,4-bis-(5-diphenylamino-[2,2′]bithiophen-5′-)-benzene (C) compounds consisting of three different components, namely the diphenylamino-, bithiophene- and central phenylene moiety, respectively, were studied spectroelectrochemically and theoretically in detail to get insights into the electron transfer mechanism and the stability of the formed charged states within such composite π-conjugated structures.