A Green-to-Near-Infrared Photoswitch Based on a Blended Subporphyrazine-Dithienylethene System

Org Lett. 2024 Feb 2;26(4):955-959. doi: 10.1021/acs.orglett.3c04320. Epub 2024 Jan 18.

Abstract

A subporphyrazine (SubPz)-dithienylethene (DTE) photochromic device with 1o and 1c states, was developed and characterized. In this device, the DTE unit can reversibly switch the SubPz absorbance from green to near-infrared [λmax (o/c) = 527 nm/740 nm], as well as the SubPz fluorescence and singlet oxygen quantum yields. The core of this design involves using a highly tunable SubPz chromophore that shares its quasi-isolated ethene moiety with a DTE photoswitch.