Near-infrared (NIR) emitting molecules are promising candidates for biological sensing and imaging applications; however, many NIR dyes are large conjugated systems which frequently have issues with stability, solubility, and tunability. We have reported a novel class of compact and tunable fluorescent diradicaloid complexes which are air, water, light, and temperature stable. These properties arise from a compressed π manifold which promotes an intense ligand-centered π-π transition in the NIR II (1000 nm-1700 nm) region which subsequently emits at ~1200 nm. This emission is among the brightest known for molecular lumiphores with deep NIR II (&gt;1100 nm) emission, nearly an order of magnitude brighter than the commercially available NIR II dye IR 26. Furthermore, this fluorescence is electrochemically sensitive, with efficient switching upon addition of redox agents. The brightness, stability, and modularity of this system distinguishes it as a promising candidate for the development of new technologies built around NIR emission.

Bright, modular, and switchable near-infrared II emission from compact tetrathiafulvalene-based diradicaloid complexes

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.