Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 13, Pages 5268-5272Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201913287
Keywords
bismuth; metal iodate fluorides; nonlinear optics; second harmonic generation; thermochromism
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Funding
- National Natural Science Foundation of China [51425205, U1605245, 51890862, 21921001]
- National Key Research and Development Plan of the Ministry of Science and Technology [2016YFB0402104]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- China Postdoctoral Science Foundation [2019M652267]
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An ammonium-containing metal iodate fluoride compound, (NH4)Bi-2(IO3)(2)F-5, featuring a two-dimensional double-layered framework constructed by [BiO2F5](6-) and [BiO4F4](9-) polyhedra, as well as [IO3](-) groups, was successfully synthesized. The well-ordered alignment of these SHG-active units leads to an extraordinary strong SHG response of 9.2 times that of KDP. Moreover, this compound possesses a large birefringence (Delta n=0.0690 at 589.3 nm), a wide energy band gap (E-g=3.88 eV), and a high laser damage threshold (LDT; 40.2xAgGaS(2)). In particular, thermochromic behavior was observed for the first time in this type of compound. Such multifunctional crystals will expand the application of nonlinear optical materials.
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