Self-assembled chromophoric thin film NLO materials. Effect of coupling agent surface functionalization and ion exchange processes on second harmonic generation characteristics

Ashok K. Kakkar, Shlomo Yitzchaik, Stephen B. Roscoe, Tobin J Marks, Weiping Lin, George K. Wong

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A systematic study of the reaction of 1-chloromethyl-4-(2-trichlorosilylethyl)-benzene (coupling agent) with the surface SiOH groups of glass for times from 15 min to 48 h, followed by stilbazole chromophore precursor deposition/quaternization, is reported. Second harmonic generation characteristics of these thin film materials indicate that a 15 min coupling agent reaction attains approximately 65% of full surface coverage (based on χzzz (2)) of benzylic chloride moieties, but that 24 h is the optimal time for maximum coverage. The surface-anchored chromophoric chloride salts in such materials undergo facile ion exchange with iodide, p-aminobenzenesulphonate, and ethyl orange, leading to enhancements in χzzz (2) of up to 50%.

Original languageEnglish
Pages (from-to)142-145
Number of pages4
JournalThin Solid Films
Volume242
Issue number1-2
DOIs
Publication statusPublished - Apr 15 1994

Fingerprint

Coupling agents
Harmonic generation
Ion exchange
harmonic generations
Thin films
Chlorides
thin films
chlorides
ions
Iodides
Chromophores
Benzene
iodides
chromophores
Salts
benzene
salts
Glass
augmentation
glass

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Self-assembled chromophoric thin film NLO materials. Effect of coupling agent surface functionalization and ion exchange processes on second harmonic generation characteristics. / Kakkar, Ashok K.; Yitzchaik, Shlomo; Roscoe, Stephen B.; Marks, Tobin J; Lin, Weiping; Wong, George K.

In: Thin Solid Films, Vol. 242, No. 1-2, 15.04.1994, p. 142-145.

Research output: Contribution to journalArticle

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