New side-chain liquid crystalline terpolymers with anhydrous conductivity: effect of azobenzene substitution on light response and charge transfer

Sakinah Mohd Alauddin; A. Ramadan  Ibrahim; Nurul Fadhilah Kamalul Aripin; Thamil Selvi Velayutham; Osama K.  Abou-Zied; Alfonso Martinez-Felipe

doi:10.1016/j.eurpolymj.2020.110246

New side-chain liquid crystalline terpolymers with anhydrous conductivity: effect of azobenzene substitution on light response and charge transfer

Sakinah Mohd Alauddin, A. Ramadan Ibrahim, Nurul Fadhilah Kamalul Aripin, Thamil Selvi Velayutham, Osama K. Abou-Zied, Alfonso Martinez-Felipe

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Abstract

We have prepared and characterised a series of side-chain liquid crystalline homopolymers and terpolymers containing different azobenzene derivatives (RAzB), sulfonic groups (2- acrylamido-2-methyl-1-propanesulfonic acid, AMPS), and methyl(methacrylate) groups (MMA), as monomeric units. We have evaluated the effect of different para-substitutes of 6- (4-azobenzene -4’-oxy)hexyl methacrylate, at the side chains, OCH3, NO2 and H, on the phase behaviour and conductivity of the new polymers. The copolymers can form smectic and nematic phases, depending on their composition, and have light responsiveness, conferred by the azobenzene chromophores. The terpolymer with methoxy terminations, MeOAzB/AMPS/MMA, exhibits the highest conductivity values of the series (10-2/10-3 S·cm-1 range) through liquid crystalline phases and with signs of decoupling from polymeric segmental motions. These materials are promising candidates to develop new light responsive polymeric electrolytes for electrochemical conversion devices in which ionic conductivity under anhydrous conditions can be controlled by their nanostructure.

Original language	English
Article number	110246
Number of pages	10
Journal	European Polymer Journal
Volume	146
Early online date	5 Jan 2021
DOIs	https://doi.org/10.1016/j.eurpolymj.2020.110246
Publication status	Published - 5 Mar 2021

Bibliographical note

Acknowledgements:
SMA and NFKA would like to acknowledge Malaysian Ministry of Higher Education, for the grant number 600-IRMI/FRGS 5/3 (374/2019). OKAZ and ARI would like to acknowledge the Sultan Qaboos University, by its support through His Majesty’s Trust Fund for Strategic Research (SR/SCI/CHEM/18/01) and Omantel fund (EG/SQU-OT/19/1). TSV acknowledges financial support from the University of Malaya for the RU grant [ST001-2020]. AMF would like to thank the Royal Academy of Engineering, U.K., for the grant NRCP1516/4/61 (Newton Research Collaboration Programme), the University of Aberdeen, for the award of the grant SF10192, the Carnegie Trust for the Universities of Scotland, for the Research Incentive Grant RIG008586, the Royal Society and Specac Ltd., for the Research Grant

Keywords

side-chain liquid crystal polymers
Ionic conductivity
azobenzene
energy conversion
Polymer electrolytes

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Cite this

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title = "New side-chain liquid crystalline terpolymers with anhydrous conductivity: effect of azobenzene substitution on light response and charge transfer",

abstract = "We have prepared and characterised a series of side-chain liquid crystalline homopolymers and terpolymers containing different azobenzene derivatives (RAzB), sulfonic groups (2- acrylamido-2-methyl-1-propanesulfonic acid, AMPS), and methyl(methacrylate) groups (MMA), as monomeric units. We have evaluated the effect of different para-substitutes of 6- (4-azobenzene -4{\textquoteright}-oxy)hexyl methacrylate, at the side chains, OCH3, NO2 and H, on the phase behaviour and conductivity of the new polymers. The copolymers can form smectic and nematic phases, depending on their composition, and have light responsiveness, conferred by the azobenzene chromophores. The terpolymer with methoxy terminations, MeOAzB/AMPS/MMA, exhibits the highest conductivity values of the series (10-2/10-3 S·cm-1 range) through liquid crystalline phases and with signs of decoupling from polymeric segmental motions. These materials are promising candidates to develop new light responsive polymeric electrolytes for electrochemical conversion devices in which ionic conductivity under anhydrous conditions can be controlled by their nanostructure.",

keywords = "side-chain liquid crystal polymers, Ionic conductivity, azobenzene, energy conversion, Polymer electrolytes",

author = "{Mohd Alauddin}, Sakinah and Ibrahim, {A. Ramadan} and {Kamalul Aripin}, {Nurul Fadhilah} and Velayutham, {Thamil Selvi} and Abou-Zied, {Osama K.} and Alfonso Martinez-Felipe",

note = "Acknowledgements: SMA and NFKA would like to acknowledge Malaysian Ministry of Higher Education, for the grant number 600-IRMI/FRGS 5/3 (374/2019). OKAZ and ARI would like to acknowledge the Sultan Qaboos University, by its support through His Majesty{\textquoteright}s Trust Fund for Strategic Research (SR/SCI/CHEM/18/01) and Omantel fund (EG/SQU-OT/19/1). TSV acknowledges financial support from the University of Malaya for the RU grant [ST001-2020]. AMF would like to thank the Royal Academy of Engineering, U.K., for the grant NRCP1516/4/61 (Newton Research Collaboration Programme), the University of Aberdeen, for the award of the grant SF10192, the Carnegie Trust for the Universities of Scotland, for the Research Incentive Grant RIG008586, the Royal Society and Specac Ltd., for the Research Grant ",

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T2 - effect of azobenzene substitution on light response and charge transfer

AU - Mohd Alauddin, Sakinah

AU - Ibrahim, A. Ramadan

AU - Kamalul Aripin, Nurul Fadhilah

AU - Velayutham, Thamil Selvi

AU - Abou-Zied, Osama K.

AU - Martinez-Felipe, Alfonso

N1 - Acknowledgements: SMA and NFKA would like to acknowledge Malaysian Ministry of Higher Education, for the grant number 600-IRMI/FRGS 5/3 (374/2019). OKAZ and ARI would like to acknowledge the Sultan Qaboos University, by its support through His Majesty’s Trust Fund for Strategic Research (SR/SCI/CHEM/18/01) and Omantel fund (EG/SQU-OT/19/1). TSV acknowledges financial support from the University of Malaya for the RU grant [ST001-2020]. AMF would like to thank the Royal Academy of Engineering, U.K., for the grant NRCP1516/4/61 (Newton Research Collaboration Programme), the University of Aberdeen, for the award of the grant SF10192, the Carnegie Trust for the Universities of Scotland, for the Research Incentive Grant RIG008586, the Royal Society and Specac Ltd., for the Research Grant

PY - 2021/3/5

Y1 - 2021/3/5

N2 - We have prepared and characterised a series of side-chain liquid crystalline homopolymers and terpolymers containing different azobenzene derivatives (RAzB), sulfonic groups (2- acrylamido-2-methyl-1-propanesulfonic acid, AMPS), and methyl(methacrylate) groups (MMA), as monomeric units. We have evaluated the effect of different para-substitutes of 6- (4-azobenzene -4’-oxy)hexyl methacrylate, at the side chains, OCH3, NO2 and H, on the phase behaviour and conductivity of the new polymers. The copolymers can form smectic and nematic phases, depending on their composition, and have light responsiveness, conferred by the azobenzene chromophores. The terpolymer with methoxy terminations, MeOAzB/AMPS/MMA, exhibits the highest conductivity values of the series (10-2/10-3 S·cm-1 range) through liquid crystalline phases and with signs of decoupling from polymeric segmental motions. These materials are promising candidates to develop new light responsive polymeric electrolytes for electrochemical conversion devices in which ionic conductivity under anhydrous conditions can be controlled by their nanostructure.

AB - We have prepared and characterised a series of side-chain liquid crystalline homopolymers and terpolymers containing different azobenzene derivatives (RAzB), sulfonic groups (2- acrylamido-2-methyl-1-propanesulfonic acid, AMPS), and methyl(methacrylate) groups (MMA), as monomeric units. We have evaluated the effect of different para-substitutes of 6- (4-azobenzene -4’-oxy)hexyl methacrylate, at the side chains, OCH3, NO2 and H, on the phase behaviour and conductivity of the new polymers. The copolymers can form smectic and nematic phases, depending on their composition, and have light responsiveness, conferred by the azobenzene chromophores. The terpolymer with methoxy terminations, MeOAzB/AMPS/MMA, exhibits the highest conductivity values of the series (10-2/10-3 S·cm-1 range) through liquid crystalline phases and with signs of decoupling from polymeric segmental motions. These materials are promising candidates to develop new light responsive polymeric electrolytes for electrochemical conversion devices in which ionic conductivity under anhydrous conditions can be controlled by their nanostructure.

KW - side-chain liquid crystal polymers

KW - Ionic conductivity

KW - azobenzene

KW - energy conversion

KW - Polymer electrolytes

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U2 - 10.1016/j.eurpolymj.2020.110246

DO - 10.1016/j.eurpolymj.2020.110246

M3 - Article

SN - 0014-3057

VL - 146

JO - European Polymer Journal

JF - European Polymer Journal

M1 - 110246

ER -

New side-chain liquid crystalline terpolymers with anhydrous conductivity: effect of azobenzene substitution on light response and charge transfer

Abstract

Bibliographical note

Keywords

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