Open AccessTunable Emission Properties of Manganese Chloride Small Single Crystals by Pyridine Incorporation
Author(s) -
Chunyang Li,
Xianwei Bai,
Yongchang Guo,
B. S. Zou
Publication year - 2019
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.8b03661
Subject(s) - pyridine , crystallography , ferromagnetism , luminescence , octahedron , crystal structure , manganese , materials science , single crystal , transition metal , halide , paramagnetism , molecule , chemistry , inorganic chemistry , condensed matter physics , physics , organic chemistry , optoelectronics , catalysis , metallurgy
Pure transition-metal compounds seldom produce luminescence because of electron correlation and spin-spin coupling. The Pb-free perovskite materials, C 10 H 12 N 2 MnCl 4 and C 5 H 6 NMnCl 3 ·H 2 O, were obtained by using pyridine-implanted manganese chloride lattices. The single-crystal X-ray diffraction indicates their different crystal structures. In C 10 H 12 N 2 MnCl 4 , MnCl 4 cocoordinated with two pyridine molecules forms a lattice composed of independent mononuclear structures with paramagnetic behavior, which shows a clear emission band at 518 nm from the lowest d-d transition of a single Mn(II) ion in the octahedral crystal field. In C 5 H 6 NMnCl 5 ·H 2 O crystal, MnCl 5 ·(H 2 O) x octahedron-cocoordinated with less pyridine molecules than 2 lead to formation arris-share linear chains of Mn-ion octahedra, which give emission band at 620 nm due to the ferromagnetic Mn pair, and ferromagnetism. Pyridine incorporations in the transition-metal halide lattice provide a new channel to modulate the electron correlation and obtain materials with both luminescence and ferromagnetic properties.