The overlooked NIR luminescence of Cr(ppy)3

Laura Stein; Pit Boden; Robert Naumann; Christoph Förster; Gereon Niedner-Schatteburg; Katja Heinze

doi:10.1039/D2CC00680D

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The overlooked NIR luminescence of Cr(ppy)₃†

Laura Stein,^a Pit Boden,^b Robert Naumann,

^a Christoph Förster,^a Gereon Niedner-Schatteburg

^b and Katja Heinze

*^a

Author affiliations

* Corresponding authors

^a Johannes Gutenberg-University, Department of Chemistry, Duesbergweg 10-14, Mainz, Germany
E-mail: katja.heinze@uni-mainz.de
Tel: +49 6131 3925886

^b Department of Chemistry and Research Center Optimas, TU Kaiserslautern, Erwin-Schrödinger-Straße 52, Germany

Abstract

Cr(ppy)₃, a structural analog of the green phosphorescent Ir(ppy)₃, emits even in solution at room temperature from a weakly distorted spin–flip state at 910 nm (Hppy = 2-phenylpyridine). The low energy arises from an enhanced covalence of the Cr–C bonds as compared to Cr–N bonds. Lower temperature reduces thermally activated decay increasing the emission intensity.

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Article information

DOI: https://doi.org/10.1039/D2CC00680D
Article type: Communication
Submitted: 15 Feb 2022
Accepted: 21 Feb 2022
First published: 21 Feb 2022
This article is Open Access

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Chem. Commun., 2022,58, 3701-3704

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The overlooked NIR luminescence of Cr(ppy)₃

L. Stein, P. Boden, R. Naumann, C. Förster, G. Niedner-Schatteburg and K. Heinze, Chem. Commun., 2022, 58, 3701 DOI: 10.1039/D2CC00680D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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Chemical Communications