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",

month = apr,

day = "15",

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

language = "אנגלית",

volume = "242",

pages = "142--145",

journal = "Thin Solid Films",

issn = "0040-6090",

publisher = "Elsevier B.V.",

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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

TY - JOUR

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

N2 - 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%.

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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