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. 2024 Jun 21;89(12):9092-9097.
doi: 10.1021/acs.joc.4c00741. Epub 2024 Jun 6.

Phospha-RosIndolizine Dye with Shortwave Infrared (SWIR) Absorption and Emission

Matthew A Saucier  1 , Nicholas A Kruse  1 , Brennan E Seidel  1 , Nathan I Hammer  1 , Gregory S Tschumper  1 , Jared H Delcamp  1
Affiliations

Phospha-RosIndolizine Dye with Shortwave Infrared (SWIR) Absorption and Emission

Matthew A Saucier et al. J Org Chem. .

Abstract

Shortwave infrared (SWIR, 1000-1700 nm) absorbing and emitting dyes are needed for infrared diodes and sensors used in a wide variety of industrial and medical applications. Herein, an electron-withdrawing phosphine oxide (P═O) substituted xanthene is coupled with strong indolizine donors to produce a SWIR absorbing (λabs = 1294 nm in DCM) and emitting (λemis = 1450 nm in DCM) dye called PRos1450. The unique properties of this dye are characterized via photophysical, electrochemical, and computational analyses.

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