The influence of substitutents on the orientational behaviour of novel azobenzene side-chain polyesters

I. Zebger; C. Kulinna; H.W. Siesler; F. Andruzzi; M. Pedersen; P.S. Ramanujam; Søren Hvilsted

doi:10.1002/masy.19950940114

The influence of substitutents on the orientational behaviour of novel azobenzene side-chain polyesters

I. Zebger, C. Kulinna, H.W. Siesler, F. Andruzzi, M. Pedersen, P.S. Ramanujam, Søren Hvilsted

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A series of new mesogenic azobenzene propanediols with nitro, methoxy, cyano and no substituent have been synthesized and their mesomorphic behaviour mapped. The diols are employed in a melt transesterification with diphenyl tetradecanedioate to produce side‐chain polyesters with high molar masses. Diols and polyesters have similar UV‐visible spectra reflecting the acceptor character of the substituent. Polarization FTIR spectroscopy has been used to determine the mesogenic order parameter for the polyesters with different substituents at four laser irradiation wavelengths (413, 458, 488 and 515 nm). Diffraction gratings in thin polyester films have been recorded through polarization holography. Cyano and unsubstituted azobenzene polyesters are shown to exhibit the highest diffraction efficiencies on the order of 13%.

Original language	English
Journal	Macromolecular Symposia
Volume	94
Issue number	1
Pages (from-to)	159-170
ISSN	1022-1360
DOIs	https://doi.org/10.1002/masy.19950940114
Publication status	Published - 1995

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title = "The influence of substitutents on the orientational behaviour of novel azobenzene side-chain polyesters",

abstract = "A series of new mesogenic azobenzene propanediols with nitro, methoxy, cyano and no substituent have been synthesized and their mesomorphic behaviour mapped. The diols are employed in a melt transesterification with diphenyl tetradecanedioate to produce side‐chain polyesters with high molar masses. Diols and polyesters have similar UV‐visible spectra reflecting the acceptor character of the substituent. Polarization FTIR spectroscopy has been used to determine the mesogenic order parameter for the polyesters with different substituents at four laser irradiation wavelengths (413, 458, 488 and 515 nm). Diffraction gratings in thin polyester films have been recorded through polarization holography. Cyano and unsubstituted azobenzene polyesters are shown to exhibit the highest diffraction efficiencies on the order of 13%.",

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T1 - The influence of substitutents on the orientational behaviour of novel azobenzene side-chain polyesters

AU - Zebger, I.

AU - Kulinna, C.

AU - Siesler, H.W.

AU - Andruzzi, F.

AU - Pedersen, M.

AU - Ramanujam, P.S.

AU - Hvilsted, Søren

PY - 1995

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N2 - A series of new mesogenic azobenzene propanediols with nitro, methoxy, cyano and no substituent have been synthesized and their mesomorphic behaviour mapped. The diols are employed in a melt transesterification with diphenyl tetradecanedioate to produce side‐chain polyesters with high molar masses. Diols and polyesters have similar UV‐visible spectra reflecting the acceptor character of the substituent. Polarization FTIR spectroscopy has been used to determine the mesogenic order parameter for the polyesters with different substituents at four laser irradiation wavelengths (413, 458, 488 and 515 nm). Diffraction gratings in thin polyester films have been recorded through polarization holography. Cyano and unsubstituted azobenzene polyesters are shown to exhibit the highest diffraction efficiencies on the order of 13%.

AB - A series of new mesogenic azobenzene propanediols with nitro, methoxy, cyano and no substituent have been synthesized and their mesomorphic behaviour mapped. The diols are employed in a melt transesterification with diphenyl tetradecanedioate to produce side‐chain polyesters with high molar masses. Diols and polyesters have similar UV‐visible spectra reflecting the acceptor character of the substituent. Polarization FTIR spectroscopy has been used to determine the mesogenic order parameter for the polyesters with different substituents at four laser irradiation wavelengths (413, 458, 488 and 515 nm). Diffraction gratings in thin polyester films have been recorded through polarization holography. Cyano and unsubstituted azobenzene polyesters are shown to exhibit the highest diffraction efficiencies on the order of 13%.

KW - Optisk måleteknik og informationsbehandling

U2 - 10.1002/masy.19950940114

DO - 10.1002/masy.19950940114

M3 - Journal article

SN - 1022-1360

VL - 94

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EP - 170

JO - Macromolecular Symposia

JF - Macromolecular Symposia

IS - 1

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The influence of substitutents on the orientational behaviour of novel azobenzene side-chain polyesters

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