Octupolar Molecules for Nonlinear Optics: From Molecular Design to Crystals and Films with Large Second-Harmonic Generation
- Authors
- Jeong, Mi-Yun; Cho, Bong Rae
- Issue Date
- 2월-2015
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- crystal growth; nonlinear optics; octupolar molecules; structure-activity relationships; thin films
- Citation
- CHEMICAL RECORD, v.15, no.1, pp.132 - 142
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL RECORD
- Volume
- 15
- Number
- 1
- Start Page
- 132
- End Page
- 142
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/94487
- DOI
- 10.1002/tcr.201402013
- ISSN
- 1527-8999
- Abstract
- We summarize the nonlinear optical (NLO) properties of octupolar molecules, crystals, and films developed in our laboratory. We present the design strategy, structure-property relationship, and second-order NLO properties of 1,3,5-trinitro- and 1,3,5-tricyano-2,4,6-tris(p-diethylaminostyryl)benzene (TTB) derivatives, TTB crystals, and films prepared by free-casting TTB in poly(methyl methacrylate) (PMMA). The first hyperpolarizability of TTB was fivefold larger than that of the dipolar analogue. Moreover, the TTB crystal showed unprecedentedly large second-harmonic generation (SHG). While TTB crystal films (20 wt% TTB/PMMA) on various substrates showed appreciable SHG values, the cylinder film exhibited much larger SHG values and large electro-optic (EO) coefficients. The large SHG values and EO coefficients, as well as the high thermal stability of the cylinder film, will make it a potential candidate for NLO device applications.
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Collections - College of Science > Department of Chemistry > 1. Journal Articles
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