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 journalArticle

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 languageEnglish
Article number112268
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume389
Early online date30 Nov 2019
DOIs
Publication statusE-pub ahead of print - 30 Nov 2019

Fingerprint

Azobenzene
AMPS (satellite payload)
Polymers
Terpolymers
Methacrylates
conductivity
Glass transition
polymers
Polymethyl Methacrylate
Electron transitions
Polymethyl methacrylates
Optoelectronic devices
Copolymerization
Electron energy levels
glass
Hydrogen bonds
copolymerization
Thermodynamic stability
polymethyl methacrylate
thermal stability

Keywords

  • Azo-Polymers
  • Dielectric spectroscopy
  • UV-Vis spectrophotometry
  • Photoanisotropy
  • Trans-to-cisphotoisomerisation
  • Conductivity

Cite this

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.; Chaganava, Irakli; Martinez-Felipe, Alfonso (Corresponding Author).

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 389, 112268, 15.02.2020.

Research output: Contribution to journalArticle

@article{35035f7e453848e8bf86e2921dfff5ab,
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",
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).",
year = "2019",
month = "11",
day = "30",
doi = "10.1016/j.jphotochem.2019.112268",
language = "English",
volume = "389",
journal = "Journal of Photochemistry and Photobiology. A, Chemistry",
issn = "1010-6030",
publisher = "Elsevier",

}

TY - JOUR

T1 - The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups

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 - 2019/11/30

Y1 - 2019/11/30

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.

KW - Azo-Polymers

KW - Dielectric spectroscopy

KW - UV-Vis spectrophotometry

KW - Photoanisotropy

KW - Trans-to-cisphotoisomerisation

KW - Conductivity

U2 - 10.1016/j.jphotochem.2019.112268

DO - 10.1016/j.jphotochem.2019.112268

M3 - Article

VL - 389

JO - Journal of Photochemistry and Photobiology. A, Chemistry

JF - Journal of Photochemistry and Photobiology. A, Chemistry

SN - 1010-6030

M1 - 112268

ER -