[((R)-C8H12N)(4)][Bi2Br10] and [((S)-C8H12N)(4)][Bi2Br10]: Chiral Hybrid Bismuth Bromides Templated by Chiral Organic Cations
- Authors
- Moon, Tae Hwan; Oh, Seung-Jin; Ok, Kang Min
- Issue Date
- Dec-2018
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS OMEGA, v.3, no.12, pp 17895 - 17903
- Pages
- 9
- Journal Title
- ACS OMEGA
- Volume
- 3
- Number
- 12
- Start Page
- 17895
- End Page
- 17903
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18642
- DOI
- 10.1021/acsomega.8b02877
- ISSN
- 2470-1343
- Abstract
- Single crystals of organically templated chiral bromobismuthates(III), [((R/S)-C8H12N)(4)][Bi2Br10], have been grown for the first time via a slow evaporation method. Each of the chiral molecular compound consists of (R) or (S)-l-phenyl-ethylammonium ([C8H12N](+)) cations and [Bi2Br10](4-) anions. Both the title compounds reveal thermal and moisture stabilities up to ca. 220 degrees C and over 1 month, respectively. The newly prepared Bi3+ based organic-inorganic hybrid materials show optical band gap of ca. 2.88 eV. The noncentrosymmetric [((R)-C8H12N)(4)][Bi2Br10] and [((S)-C8H12N)(4)][Bi2Br10] exhibit second harmonic generation efficiency of ca. 20 times that of alpha-SiO2 and are type I nonphase matchable. Uniformly deposited thin films of [((R)-C8H12N)(4)]-[ Bi2Br10] and [((S)-C8H12N)(4)][Bi2Br10] have been also successfully obtained by a simple spin-coating method. The circular dichroism spectra for both reported thin films are symmetrical, attributable to the corresponding Cotton effect. The selectively deposited chiral thin films are expected to be used as a useful platform for various surface reactions and interface engineering.
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