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

doi:10.1016/0040-6090(94)90518-5

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

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 χ_zzz⁽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 χ_zzz⁽²⁾ of up to 50%.

Original language	English
Pages (from-to)	142-145
Number of pages	4
Journal	Thin Solid Films
Volume	242
Issue number	1-2
DOIs	https://doi.org/10.1016/0040-6090(94)90518-5
State	Published - 15 Apr 1994
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by the NSF-MRL program through the Materials Research Center of North-western University (Grant DMR9120521) and by the Air Force Office of Scientific Research (Contract 90-0071). A.K.K. thanks NSERC of Canada for a postdoctoral fellowship.

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

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%.",

author = "Kakkar, {Ashok K.} and Shlomo Yitzchaik and Roscoe, {Stephen B.} and Marks, {Tobin J.} and Weiping Lin and Wong, {George K.}",

note = "Funding Information: This research was supported by the NSF-MRL program through the Materials Research Center of North-western University (Grant DMR9120521) and by the Air Force Office of Scientific Research (Contract 90-0071). A.K.K. thanks NSERC of Canada for a postdoctoral fellowship.",

year = "1994",

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doi = "10.1016/0040-6090(94)90518-5",

language = "אנגלית",

volume = "242",

pages = "142--145",

journal = "Thin Solid Films",

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

Research output: Contribution to journal › Article › peer-review

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T1 - Self-assembled chromophoric thin film NLO materials. Effect of coupling agent surface functionalization and ion exchange processes on second harmonic generation characteristics

AU - Kakkar, Ashok K.

AU - Yitzchaik, Shlomo

AU - Roscoe, Stephen B.

AU - Marks, Tobin J.

AU - Lin, Weiping

AU - Wong, George K.

N1 - Funding Information: This research was supported by the NSF-MRL program through the Materials Research Center of North-western University (Grant DMR9120521) and by the Air Force Office of Scientific Research (Contract 90-0071). A.K.K. thanks NSERC of Canada for a postdoctoral fellowship.

PY - 1994/4/15

Y1 - 1994/4/15

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AB - 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%.

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

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