Charge-Gating Dibenzothiophene-S,S-dioxide Bridges in Electron Donor–Bridge–Acceptor Conjugates

Content Provider	Semantic Scholar
Author	Yzambart, Gilles Zieleniewska, Anna Bauroth, Stefan Clark, Timothy Bryce, Martin R. Guldi, Dirk Michael
Copyright Year	2017
Abstract	The synthesis of a series of new electron donor–bridge–acceptor (D–B–A) conjugates (18–20) comprising electron-donating zinc(II) porphyrins (ZnPs) and electron-accepting fullerenes (C60s) connected through various co-oligomer bridges containing both dibenzothiophene-S,S-dioxide and fluorene units is reported. Detailed investigations using cyclic voltammetry, absorption, fluorescence, and femto/nanosecond transient absorption spectroscopy in combination with quantum chemical calculations have enabled us to develop a detailed mechanistic view of the charge-transfer processes that follow photoexcitation of ZnP, the bridge, or C60. Variations in the dynamics of charge separation, charge recombination, and charge-transfer gating are primarily consequences of the electronic properties of the co-oligomer bridges, including their electron affinity and the energy levels of the excited states. In particular, placing one dibenzothiophene-S,S-dioxide building block at the center of the molecular bridge flanked by two.
Starting Page	13557
Ending Page	13569
Page Count	13
File Format	PDF HTM / HTML
DOI	10.1021/acs.jpcc.7b03889
Volume Number	121
Alternate Webpage(s)	http://dro.dur.ac.uk/22072/1/22072.pdf?DDC110+DDD7+dch0mrb+dul4eg=
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article