Effects of π-Extension on Pyrrole Hemithioindigo Photoswitches

21 March 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The most red-shifted hemithioindigo photoswitches have been identified through systematic introduction of aryl units to a parent pyrrole hemithioindigo photoswitch. Increasing the size of the 5’-aryl substituent is ineffective at producing further redshifted chromophores. A second generation of 3’,5’-diarylated photoswitches which possess increased tunability is reported. Experimental and computational evidence indicates the 4’ position is electronically isolated from the bulk of the conjugated system.

Keywords

Photoswitch
Hemithioindigo
Density Functional Theory

Supplementary materials

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Newhouse Tetrahedron-Special-Issue-Shenvi-TOC
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Newhouse Tetrahedron-Special-Issue-Shenvi-SI
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