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Updated: Dec 25, 2025
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Nonlinear organic-inorganic halide hybrids containing unprecedented linear [MIX2]- coordination units and
Qi Wu1, Xian Liu1, Yeshuang Du1
1College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, P. R. China. wuqi2011@whu.edu.cn.
Abstract:
Organic-inorganic halide hybrids are rapidly gaining increased attention owing to their remarkable optoelectronic performance. Amongst these, divalent and trivalent metal cations (Pb2+, Sn2+, Bi3+, and Sb3+) usually link to six halogen X atoms and form an asymmetric [MX6] octahedron with weak optical anisotropy. Herein, we show a first family of monovalent-metal-based hybrid halides [N(CH3)4]MCl2 (M = Ga, In) with a zero-dimensional configuration containing unprecedented linear [MX2] units. Owing to the reduced coordination number, the lone pairs on Ga+ and In+ exhibit quasi-two-dimensional distribution, thereby leading to a narrowed bandgap, enhanced optical anisotropy and strong nonlinear second harmonic response of 1.4 and 1.3 times that of benchmark KH2PO4, respectively.
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