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

Angewandte Chemie International Edition 2026 Open access

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Authors: Damien W. Chen, Tejas Deshpande, Sybille Collignon, Farzaneh Fadaei‐Tirani, Sascha Feldmann, Kay Severin
DOI: 10.1002/anie.2203782
Cited by: 2
References: 46

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.

Fields of Study & Subjects

Supramolecular Chemistry and Complexes Molecular Sensors and Ion Detection Luminescence and Fluorescent Materials

Publication details

Journal / source
Angewandte Chemie International Edition
Publisher
Wiley
Volume
65
Issue
11
Pages
e2203782–e2203782
Publication date
1 February 2026
Language
EN