Front Cover: Design,Synthesis and Photophysical Studies of Luminescent Rhodium(III) Complexes in Near-Infrared Region (Eur. J. Inorg. Chem. 11/2023) |
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Authors: | Jingyi Lu Shunan Zhao Dr Fangfang Wei Prof Keith Man-Chung Wong |
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Institution: | Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Blvd., Shenzhen, 518055 P. R. China |
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Abstract: | A series of near-infrared (NIR)-emitting cyclometalated rhodium(III) complexes have been designed, synthesized and characterized. The NIR luminescence has been realized by rational design of strong σ-donor cyclometalating (C^N) ligand with extended π-conjugation structure for decreasing the energy level of intraligand (IL) state. In addition, the investigation of substituents on the benzog]quinoxaline moiety as the carbon-donor demonstrated that the luminescence can be further shifted to the red by the introduction of electron-donating thienyl groups. The luminescence maxima of these complexes are ranging from 763 nm to 792 nm with the luminescence quantum yield (Φlum) of 0.41 %–0.66 % in dichloromethane solution. This work demonstrates the first example of NIR-phosphorescent rhodium(III) complexes and provides an alternative for diversifying the development of NIR materials. |
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Keywords: | near-infrared photoluminescence phosphorescence photophysics rhodium |
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