The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups

Sakinah Mohd Alauddin; Nurul Fadhilah Kamalul Aripin; T. S. Velayutham; Irakli Chaganava; Alfonso Martinez-Felipe

doi:10.1016/j.jphotochem.2019.112268

The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups

Sakinah Mohd Alauddin, Nurul Fadhilah Kamalul Aripin, T. S. Velayutham, Irakli Chaganava, Alfonso Martinez-Felipe^* (Corresponding Author)

^*Corresponding author for this work

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

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Abstract

We report the preparation of a new light-responsive side-chain terpolymer containing azobenzenes, as chromophoric components, sulfonic groups, as polar components, and methacrylate groups, as film forming components, and we provide a detailed characterisation of its thermal parameters, photoanisotropic character, dielectric response and optoelectronic properties. The poly[(4-methoxyazobenzene -4′-oxy) methacrylate]-co-poly[2-acrylamido-2-methyl-1-propanesulfonic acid]-co-poly[methyl methacrylate], MeOAzB/AMPS/MMA, was prepared by radical copolymerisation, possesses high thermal stability and is amorphous. Its high glass transition (Tg = 151 °C) is explained by steric effects (induced by the bulky azobenzenes) and hydrogen bonding (promoted by the polar sulfonic groups) near the polymeric backbone, which may also reduce the photoanisotropic efficiency. The transition between the energy levels of the azobenzenes (MeOAzB) in the terpolymer is controlled by p-type conductivity, and can be associated to motions in the side-chains containing the sulfonic groups (AMPS), which are locally activated below the MeOAzB/AMPS/MMA glass transition.

Original language	English
Article number	112268
Number of pages	9
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	389
Early online date	30 Nov 2019
DOIs	https://doi.org/10.1016/j.jphotochem.2019.112268
Publication status	Published - 15 Feb 2020

Bibliographical note

This work was supported by the University Malaya under the UMRG grant RP038B-17AFR. NFKA and AMF would like to thank the Royal Academy of Engineering, U.K., and Academy of Science, Malaysia, for the grant NRCP1516/4/61, from the Newton Research Collaboration Programme, and the University of Aberdeen, for the award of the grant SF10192, corresponding to the Global Challenge Research Fund Internal Pump Priming Fund Round 2. AMF would like to acknowledge the Carnegie Trust for the Universities of Scotland for the award of one Scottish Research
Incentive Grant (RIG008586).

Keywords

Azo-Polymers
Dielectric spectroscopy
UV-Vis spectrophotometry
Photoanisotropy
Trans-to-cisphotoisomerisation
Conductivity
CRYSTALLINE SIDE-CHAIN
METHYL-METHACRYLATE
BEHAVIOR
LIGHT
COPOLYMERS
DIELECTRIC-RELAXATION
PHOTOCHROMIC POLYMERS
VOLUME HOLOGRAPHIC STORAGE
THERMAL-PROPERTIES
AZOBENZENE
Trans-to-cis photoisomerisation

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The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups. / Alauddin, Sakinah Mohd; Kamalul Aripin, Nurul Fadhilah; Velayutham, T. S. et al.
In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 389, 112268, 15.02.2020.

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

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title = "The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups",

abstract = "We report the preparation of a new light-responsive side-chain terpolymer containing azobenzenes, as chromophoric components, sulfonic groups, as polar components, and methacrylate groups, as film forming components, and we provide a detailed characterisation of its thermal parameters, photoanisotropic character, dielectric response and optoelectronic properties. The poly[(4-methoxyazobenzene -4′-oxy) methacrylate]-co-poly[2-acrylamido-2-methyl-1-propanesulfonic acid]-co-poly[methyl methacrylate], MeOAzB/AMPS/MMA, was prepared by radical copolymerisation, possesses high thermal stability and is amorphous. Its high glass transition (Tg = 151 °C) is explained by steric effects (induced by the bulky azobenzenes) and hydrogen bonding (promoted by the polar sulfonic groups) near the polymeric backbone, which may also reduce the photoanisotropic efficiency. The transition between the energy levels of the azobenzenes (MeOAzB) in the terpolymer is controlled by p-type conductivity, and can be associated to motions in the side-chains containing the sulfonic groups (AMPS), which are locally activated below the MeOAzB/AMPS/MMA glass transition.",

keywords = "Azo-Polymers, Dielectric spectroscopy, UV-Vis spectrophotometry, Photoanisotropy, Trans-to-cisphotoisomerisation, Conductivity, CRYSTALLINE SIDE-CHAIN, METHYL-METHACRYLATE, BEHAVIOR, LIGHT, COPOLYMERS, DIELECTRIC-RELAXATION, PHOTOCHROMIC POLYMERS, VOLUME HOLOGRAPHIC STORAGE, THERMAL-PROPERTIES, AZOBENZENE, Trans-to-cis photoisomerisation",

author = "Alauddin, {Sakinah Mohd} and {Kamalul Aripin}, {Nurul Fadhilah} and Velayutham, {T. S.} and Irakli Chaganava and Alfonso Martinez-Felipe",

note = "This work was supported by the University Malaya under the UMRG grant RP038B-17AFR. NFKA and AMF would like to thank the Royal Academy of Engineering, U.K., and Academy of Science, Malaysia, for the grant NRCP1516/4/61, from the Newton Research Collaboration Programme, and the University of Aberdeen, for the award of the grant SF10192, corresponding to the Global Challenge Research Fund Internal Pump Priming Fund Round 2. AMF would like to acknowledge the Carnegie Trust for the Universities of Scotland for the award of one Scottish Research Incentive Grant (RIG008586).",

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AU - Alauddin, Sakinah Mohd

AU - Kamalul Aripin, Nurul Fadhilah

AU - Velayutham, T. S.

AU - Chaganava, Irakli

AU - Martinez-Felipe, Alfonso

N1 - This work was supported by the University Malaya under the UMRG grant RP038B-17AFR. NFKA and AMF would like to thank the Royal Academy of Engineering, U.K., and Academy of Science, Malaysia, for the grant NRCP1516/4/61, from the Newton Research Collaboration Programme, and the University of Aberdeen, for the award of the grant SF10192, corresponding to the Global Challenge Research Fund Internal Pump Priming Fund Round 2. AMF would like to acknowledge the Carnegie Trust for the Universities of Scotland for the award of one Scottish Research Incentive Grant (RIG008586).

PY - 2020/2/15

Y1 - 2020/2/15

N2 - We report the preparation of a new light-responsive side-chain terpolymer containing azobenzenes, as chromophoric components, sulfonic groups, as polar components, and methacrylate groups, as film forming components, and we provide a detailed characterisation of its thermal parameters, photoanisotropic character, dielectric response and optoelectronic properties. The poly[(4-methoxyazobenzene -4′-oxy) methacrylate]-co-poly[2-acrylamido-2-methyl-1-propanesulfonic acid]-co-poly[methyl methacrylate], MeOAzB/AMPS/MMA, was prepared by radical copolymerisation, possesses high thermal stability and is amorphous. Its high glass transition (Tg = 151 °C) is explained by steric effects (induced by the bulky azobenzenes) and hydrogen bonding (promoted by the polar sulfonic groups) near the polymeric backbone, which may also reduce the photoanisotropic efficiency. The transition between the energy levels of the azobenzenes (MeOAzB) in the terpolymer is controlled by p-type conductivity, and can be associated to motions in the side-chains containing the sulfonic groups (AMPS), which are locally activated below the MeOAzB/AMPS/MMA glass transition.

AB - We report the preparation of a new light-responsive side-chain terpolymer containing azobenzenes, as chromophoric components, sulfonic groups, as polar components, and methacrylate groups, as film forming components, and we provide a detailed characterisation of its thermal parameters, photoanisotropic character, dielectric response and optoelectronic properties. The poly[(4-methoxyazobenzene -4′-oxy) methacrylate]-co-poly[2-acrylamido-2-methyl-1-propanesulfonic acid]-co-poly[methyl methacrylate], MeOAzB/AMPS/MMA, was prepared by radical copolymerisation, possesses high thermal stability and is amorphous. Its high glass transition (Tg = 151 °C) is explained by steric effects (induced by the bulky azobenzenes) and hydrogen bonding (promoted by the polar sulfonic groups) near the polymeric backbone, which may also reduce the photoanisotropic efficiency. The transition between the energy levels of the azobenzenes (MeOAzB) in the terpolymer is controlled by p-type conductivity, and can be associated to motions in the side-chains containing the sulfonic groups (AMPS), which are locally activated below the MeOAzB/AMPS/MMA glass transition.

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KW - Dielectric spectroscopy

KW - UV-Vis spectrophotometry

KW - Photoanisotropy

KW - Trans-to-cisphotoisomerisation

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KW - METHYL-METHACRYLATE

KW - BEHAVIOR

KW - LIGHT

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KW - DIELECTRIC-RELAXATION

KW - PHOTOCHROMIC POLYMERS

KW - VOLUME HOLOGRAPHIC STORAGE

KW - THERMAL-PROPERTIES

KW - AZOBENZENE

KW - Trans-to-cis photoisomerisation

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DO - 10.1016/j.jphotochem.2019.112268

M3 - Article

SN - 1010-6030

VL - 389

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

M1 - 112268

ER -

The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups

Abstract

Bibliographical note

Keywords

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