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The Mechanism of Luminescence of Crystals of the Complex Formed by Manganese (II) Chloride with 3‐Ethyl‐4‐Methylpyridine Hydrochloride
Author(s) -
Burić I.,
Nikolić K.,
Aleksić A.
Publication year - 1974
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220640220
Subject(s) - luminescence , manganese , chemistry , absorption (acoustics) , excitation , chloride , absorption spectroscopy , analytical chemistry (journal) , photochemistry , materials science , optics , organic chemistry , physics , optoelectronics , electrical engineering , composite material , engineering
The luminescent properties of crystals of the complex formed by manganese(II)chloride with 3‐ethyl‐4‐methylpyridine hydrochloride were studied at different temperatures by measurement of absorption, excitation, reflectance, and luminescence spectra. From the reflectance and excitation spectra in this compound 4 T 1g , 4 T 2g and 4 A 1g , 4 E g energy levels are found. It was established that there is a tetrahedral coordination of the manganese (II) ion, which brings about a green luminescence. The mechanism of the process of absorption and emission is explained in terms of the theory of the configurational model. The parameters required for plotting a configurational coordinate diagram were computed. Theoretically determined values for the maxima of excitation and luminescence are in good agreement with those determined experimentally. It is established that the phenomenon of luminescence is due to the 4 T 2g → 6 A 1 transition.