Octupolar molecules for nonlinear optics: From molecular design to crystals and films with large second-harmonic generation

Mi Yun Jeong, Bong-Rae Cho

Research output: Contribution to journalArticle

3 Citations (Scopus)

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(pdiethylaminostyryl) benzene (TTB) derivatives, TTB crystals, and films prepared by free-casting TTB in poly(methyl methacrylate) (PMMA).The first hyperpolarizability ofTTB 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 NLOdevice applications.

Original languageEnglish
Pages (from-to)132-142
Number of pages11
JournalChemical Record
Volume15
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • Crystal growth
  • Nonlinear optics
  • Octupolar molecules
  • Structure-activity relationships
  • Thin films

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry
  • Biochemistry
  • Biochemistry, medical

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