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Cover Feature: A Strongly Luminescent Chromium(III) Complex Acid (Chem. Eur. J. 48/2018)
Author(s) -
Otto Sven,
Förster Christoph,
Wang Cui,
ReschGenger Ute,
Heinze Katja
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201803590
Subject(s) - luminescence , chromium , quantum yield , photoluminescence , conjugate , chemistry , cover (algebra) , deuterium , yield (engineering) , materials science , atomic physics , physics , optoelectronics , fluorescence , optics , metallurgy , mechanical engineering , mathematical analysis , mathematics , organic chemistry , engineering
The water‐soluble near‐IR emissive chromium(III) complex [Cr(H 2 tpda) 2 ] 3+ exchanges its NH protons with deuterons in D 2 O. The absence of high‐energy NH oscillators in the first coordination sphere strongly increases the photoluminescence quantum yield to 15 % and the luminescence lifetime to 1500 μs. At high pH, the conjugate base [Cr(Htpda)(H 2 tpda)] 2+ is non‐emissive, resulting in pH‐dependent luminescent ON/OFF switching behavior. More information can be found in the Full Paper by K. Heinze, U. Resch‐Genger, et al. on page 12555.