Schlachter, Adrien and Xu, Chendong and Schiller, Jana and Melero, Raquel Utrera and Kerneis, Sebastien and Calvez, Guillaume and Costuas, Karine and Scheer, Manfred and Lescop, Christophe (2025) High-Temperature Solid-State Post-Synthetic Modification of Highly Luminescent Cu(I) Metallacycles toward New Luminescent Thermic Tracers. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 64 (1). ISSN , 1521-3773
Full text not available from this repository. (Request a copy)Abstract
A new luminescent Cu(I) tetrametallic metallacycle B is reported that features very rare semi-bridging aqua ligands. When heated markedly above room temperature, this compound undergoes a post-synthetic transformation in the solid-state, affording the new luminescent metallacycle C. Thermogravimetric analysis, IR spectroscopy and single-crystal X-ray diffraction reveal that this alteration preserves the gross tetrametallic macrocycle structure, but is caused by the release of the coordinated water molecules with the concomitant formation of cuprophilic interactions. This transition induces a shift from eye-perceived green (B) to blue (C) room-temperature luminescence for these molecular solids. Photophysical measurements and time-dependent density-functional theory calculations have been conducted to identify the origins of the emission properties lying in these structurally related assemblies, and suggest that thermally activated delayed fluorescence dominates the radiative relaxation pathways. This study highlights the innovative feature of Cu(I) derivatives, offering access to stimuli-sensitive materials that can witness, a posteriori, the exceeding of critical temperatures in their environment.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ACTIVATED DELAYED FLUORESCENCE; CRYSTAL-STRUCTURES; COORDINATION; COMPLEXES; TRANSITION; COPPER(I); WATER; TADF; Metallacycles; Luminescence; Copper; Solid-State Transitions |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Mar 2026 06:42 |
| Last Modified: | 17 Mar 2026 06:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64249 |
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