Bi2Te2O6(NO3)(2)(OH)(2)(H2O): A layered bismuth tellurium nitrate hydroxide with multiple noncentrosymmetric chromophores
- Authors
- Lee, Soyon; Jo, Hongil; Ok, Kang Min
- Issue Date
- Mar-2019
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Hydrothermal synthesis; Second-order Jahn-Teller (SOJT) Distortive cations; Noncentrosymmetry (NCS); Second-harmonic generation (SHG); Layered structure
- Citation
- JOURNAL OF SOLID STATE CHEMISTRY, v.271, pp 298 - 302
- Pages
- 5
- Journal Title
- JOURNAL OF SOLID STATE CHEMISTRY
- Volume
- 271
- Start Page
- 298
- End Page
- 302
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18189
- DOI
- 10.1016/j.jssc.2019.01.011
- ISSN
- 0022-4596
1095-726X
- Abstract
- Crystals of a novel bismuth tellurium nitrate hydroxide, Bi2Te2O6(NO3)(2)(OH)(2)(H2O), with noncentrosymmetric (NCS) structure have been grown in high yield through a hydrothermal reaction using TeO2, Bi(NO3)(3)center dot 5H(2)O, and HNO3 as reagents. Bi2Te2O6(NO3)(2)(OH)(2)(H2O) exhibits a layered structure consisting of polyhedra with second-order Jahn-Teller (SOJT) distortive cations, i.e., BiO5, BiO7, Te4+O3, and Te6+O6, as well as anionic pi-delocalized NO3- groups. Infrared spectral data not only show all of the vibrations for the constituting bonds, but confirm the existence of -OH groups in the framework of the title compound. UV-vis diffuse reflectance spectrum indicates that Bi2Te2O6(NO3)(2)(OH)(2)(H2O) reveals a band gap of ca. 4.0 eV. Thermogravimetric analysis along with powder X-ray diffraction measurements at different temperatures suggest that the crystallinity of Bi2Te2O6(NO3)(2)(OH)(2)(H2O) is maintained up to ca. 400 degrees C. Powder second-harmonic generation (SHG) measurements using 1064 nm radiation reveal that Bi2Te2O6(NO3)(2)(OH)(2)(H2O) has SHG efficiency of ca. 20 times that of alpha-SiO2 and is phase-matchable (Type-I). Local dipole moment calculations for the polyhedra of SOJT distortive cations in Bi2Te2O6(NO3)(2)(OH)(2)(H2O) are also presented.
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