期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 24, 页码 9414-9417出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202002828
关键词
birefringence; birefringent materials; peroxides; structure-property relationships; rubidium
资金
- National Natural Science Foundation of China [21833010, 51890864, 61975207, 21971238, 51872297, 21921001, 51802321, 21525104, 21833010, 51890864, 61975207, 21971238, 51872297, 21921001] Funding Source: Medline
- the Frontier Innovation Program of Chinese Academy of Sciences [ZDBS-LY-SLH024] Funding Source: Medline
- Fujian Institute of Innovation in CAS [FJCXY18010201] Funding Source: Medline
- the Strategic Priority Research Program of Chinese Academy of Sciences [XDB20000000, XDB20010200] Funding Source: Medline
- Youth Innovation Promotion of CAS [2016274] Funding Source: Medline
Birefringent materials, which can modulate the polarization of light, are almost exclusively limited to oxides. Peroxides have long been overlooked as birefringent materials, because they are usually not stable in air. Now, the first peroxide birefringent material Rb2VO(O-2)(2)F is reported, the single crystals of which keep transparency after being exposed in the air for two weeks. Interestingly, Rb2VO(O-2)(2)F does not feature an optimal anisotropic structure, but its birefringence (Delta n=0.189 at 546 nm) exceeds those of the majority of oxides. According to the first-principles calculations, this exceptional birefringence should be attributed to the strong electronic interactions between localized pi orbital of O(2)(2-)anions and V(5+)3d orbitals, which may be also favorable to the stability in the air for Rb2VO(O-2)(2)F. These findings distinguish peroxides as a brand-new class of birefringent materials that may possess birefringence superior to the traditional oxides.
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