Second-Order Nonlinear Optical Effects in Novel Polymethacrylates Containing a Molecular-Ionic Chromophore in the Side Chain

D. H. Choi; W. M.K.P. Wijekoon; H. M. Kim; P. N. Prasad

doi:10.1021/cm00038a023

Second-Order Nonlinear Optical Effects in Novel Polymethacrylates Containing a Molecular-Ionic Chromophore in the Side Chain

D. H. Choi, W. M.K.P. Wijekoon, H. M. Kim, P. N. Prasad

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Abstract

We have synthesized new glassy methacrylate polymers containing a molecular-ionic (N-methylpyridinium) nonlinear optical chromophore in the side chain. A bulky tetraphenylborate (TPB) counterion was substituted at the salt unit in order to reduce the migration of the counterion during the process of poling. It was found that the poling-induced chromophore alignment of the TPB-containing polymer is significantly improved compared to that of the iodide or bromide containing polymers. The second-order nonlinear optical susceptibility, ϰ⁽²⁾(−2ω;ω,ω), of the poled TPB-containing polymer is approximately 5 times larger than that of the corresponding iodide analogue. Also, the temporal stability of the poled structure of the TPB-containing polymer is found to be considerably improved over that of the analogous iodide containing polymer.

Original language	English
Pages (from-to)	234-238
Number of pages	5
Journal	Chemistry of Materials
Volume	6
Issue number	2
DOIs	https://doi.org/10.1021/cm00038a023
Publication status	Published - 1994 Feb 1
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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title = "Second-Order Nonlinear Optical Effects in Novel Polymethacrylates Containing a Molecular-Ionic Chromophore in the Side Chain",

abstract = "We have synthesized new glassy methacrylate polymers containing a molecular-ionic (N-methylpyridinium) nonlinear optical chromophore in the side chain. A bulky tetraphenylborate (TPB) counterion was substituted at the salt unit in order to reduce the migration of the counterion during the process of poling. It was found that the poling-induced chromophore alignment of the TPB-containing polymer is significantly improved compared to that of the iodide or bromide containing polymers. The second-order nonlinear optical susceptibility, ϰ(2)(−2ω;ω,ω), of the poled TPB-containing polymer is approximately 5 times larger than that of the corresponding iodide analogue. Also, the temporal stability of the poled structure of the TPB-containing polymer is found to be considerably improved over that of the analogous iodide containing polymer.",

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AU - Choi, D. H.

AU - Wijekoon, W. M.K.P.

AU - Kim, H. M.

AU - Prasad, P. N.

PY - 1994/2/1

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N2 - We have synthesized new glassy methacrylate polymers containing a molecular-ionic (N-methylpyridinium) nonlinear optical chromophore in the side chain. A bulky tetraphenylborate (TPB) counterion was substituted at the salt unit in order to reduce the migration of the counterion during the process of poling. It was found that the poling-induced chromophore alignment of the TPB-containing polymer is significantly improved compared to that of the iodide or bromide containing polymers. The second-order nonlinear optical susceptibility, ϰ(2)(−2ω;ω,ω), of the poled TPB-containing polymer is approximately 5 times larger than that of the corresponding iodide analogue. Also, the temporal stability of the poled structure of the TPB-containing polymer is found to be considerably improved over that of the analogous iodide containing polymer.

AB - We have synthesized new glassy methacrylate polymers containing a molecular-ionic (N-methylpyridinium) nonlinear optical chromophore in the side chain. A bulky tetraphenylborate (TPB) counterion was substituted at the salt unit in order to reduce the migration of the counterion during the process of poling. It was found that the poling-induced chromophore alignment of the TPB-containing polymer is significantly improved compared to that of the iodide or bromide containing polymers. The second-order nonlinear optical susceptibility, ϰ(2)(−2ω;ω,ω), of the poled TPB-containing polymer is approximately 5 times larger than that of the corresponding iodide analogue. Also, the temporal stability of the poled structure of the TPB-containing polymer is found to be considerably improved over that of the analogous iodide containing polymer.

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Second-Order Nonlinear Optical Effects in Novel Polymethacrylates Containing a Molecular-Ionic Chromophore in the Side Chain

Abstract

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