Work

A Metallosupramolecular Receptor for Squaraine Dyes Enabling Ultrafast Dark Resonance Energy Transfer

Year: 2026

Type: article

Abstract: ions. The cage acts as a potent receptor for squaraine dyes, with a pronounced preference for guests with 2,6-dihydroxyphenyl substituents. This selectivity profile differs from that of previously reported receptors for squaraine dyes. The acridone-based cage itself is non-emissive. Upon its photoexcitation, ultrafast (sub-ps) dark resonance energy transfer (DRET) to the encapsulated squaraine dyes was observed, resulting in bright, near-infrared guest emission, with pseudo-Stokes shifts of up to 440 nm. Upon binding of a chiral dye, chirality transfer to the host could be evidenced by circular dichroism spectroscopy.

Source: Angewandte Chemie International Edition

DOI: 10.1002/anie.2203782

Authors: Damien W. Chen, Tejas Deshpande, Sybille Collignon, Farzaneh Fadaei‐Tirani, Sascha Feldmann, Kay Severin

Institution: École Polytechnique Fédérale de Lausanne

Language: English

Topic: Supramolecular Chemistry and Complexes

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,510

Funder: École Polytechnique Fédérale de Lausanne