Self-assembly and photo-responsive behavior of novel ABC 2-type block copolymers containing azobenzene moieties

Yingying Wang; Shaoliang Lin; Minghui Zang; Yaohui Xing; Xiaohua He; Jiaping Lin; Tao Chen

doi:10.1039/c2sm07100b

Self-assembly and photo-responsive behavior of novel ABC ₂-type block copolymers containing azobenzene moieties

Yingying Wang, Shaoliang Lin, Minghui Zang, Yaohui Xing, Xiaohua He, Jiaping Lin, Tao Chen

School of Chemistry and Molecular Engineering

East China University of Science and Technology

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

53 Scopus citations

Abstract

The self-assembly behavior and photo-responsive properties of novel azobenzene based copolymers poly(ethylene oxide) monomethyl ether-block- polystyrene-block-{poly[6-(4-methoxy-azobenzene-4′-oxy) hexylmethacrylate]} ₂ [MPEO-b-PS-b-(PMMAZO) ₂] with various block lengths of PMMAZO segments in aqueous media were studied by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis spectrophotometry. It was found that the critical water content for the aggregate formation increases with the PMMAZO weight fraction. By tailoring the molecular structure and copolymer concentration, various self-assembled aggregates were obtained. At a lower concentration, all the copolymers self-assembled into simple vesicles. With increasing the polymer concentration, large compound vesicles were formed. The photo-sensitive properties of the formed aggregates were also studied. Upon irradiation with a polarized light, the aggregates were elongated. Large compound vesicles were found to deform into compact spindles with a very large axial ratio.

Original language	English
Pages (from-to)	3131-3138
Number of pages	8
Journal	Soft Matter
Volume	8
Issue number	11
DOIs	https://doi.org/10.1039/c2sm07100b
State	Published - 21 Mar 2012

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@article{d9e9de7eff054121ad7a102dfa805967,

title = "Self-assembly and photo-responsive behavior of novel ABC 2-type block copolymers containing azobenzene moieties",

abstract = "The self-assembly behavior and photo-responsive properties of novel azobenzene based copolymers poly(ethylene oxide) monomethyl ether-block- polystyrene-block-\{poly[6-(4-methoxy-azobenzene-4′-oxy) hexylmethacrylate]\} 2 [MPEO-b-PS-b-(PMMAZO) 2] with various block lengths of PMMAZO segments in aqueous media were studied by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis spectrophotometry. It was found that the critical water content for the aggregate formation increases with the PMMAZO weight fraction. By tailoring the molecular structure and copolymer concentration, various self-assembled aggregates were obtained. At a lower concentration, all the copolymers self-assembled into simple vesicles. With increasing the polymer concentration, large compound vesicles were formed. The photo-sensitive properties of the formed aggregates were also studied. Upon irradiation with a polarized light, the aggregates were elongated. Large compound vesicles were found to deform into compact spindles with a very large axial ratio.",

author = "Yingying Wang and Shaoliang Lin and Minghui Zang and Yaohui Xing and Xiaohua He and Jiaping Lin and Tao Chen",

year = "2012",

month = mar,

day = "21",

doi = "10.1039/c2sm07100b",

language = "英语",

volume = "8",

pages = "3131--3138",

journal = "Soft Matter",

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TY - JOUR

T1 - Self-assembly and photo-responsive behavior of novel ABC 2-type block copolymers containing azobenzene moieties

AU - Wang, Yingying

AU - Lin, Shaoliang

AU - Zang, Minghui

AU - Xing, Yaohui

AU - He, Xiaohua

AU - Lin, Jiaping

AU - Chen, Tao

PY - 2012/3/21

Y1 - 2012/3/21

N2 - The self-assembly behavior and photo-responsive properties of novel azobenzene based copolymers poly(ethylene oxide) monomethyl ether-block- polystyrene-block-{poly[6-(4-methoxy-azobenzene-4′-oxy) hexylmethacrylate]} 2 [MPEO-b-PS-b-(PMMAZO) 2] with various block lengths of PMMAZO segments in aqueous media were studied by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis spectrophotometry. It was found that the critical water content for the aggregate formation increases with the PMMAZO weight fraction. By tailoring the molecular structure and copolymer concentration, various self-assembled aggregates were obtained. At a lower concentration, all the copolymers self-assembled into simple vesicles. With increasing the polymer concentration, large compound vesicles were formed. The photo-sensitive properties of the formed aggregates were also studied. Upon irradiation with a polarized light, the aggregates were elongated. Large compound vesicles were found to deform into compact spindles with a very large axial ratio.

AB - The self-assembly behavior and photo-responsive properties of novel azobenzene based copolymers poly(ethylene oxide) monomethyl ether-block- polystyrene-block-{poly[6-(4-methoxy-azobenzene-4′-oxy) hexylmethacrylate]} 2 [MPEO-b-PS-b-(PMMAZO) 2] with various block lengths of PMMAZO segments in aqueous media were studied by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis spectrophotometry. It was found that the critical water content for the aggregate formation increases with the PMMAZO weight fraction. By tailoring the molecular structure and copolymer concentration, various self-assembled aggregates were obtained. At a lower concentration, all the copolymers self-assembled into simple vesicles. With increasing the polymer concentration, large compound vesicles were formed. The photo-sensitive properties of the formed aggregates were also studied. Upon irradiation with a polarized light, the aggregates were elongated. Large compound vesicles were found to deform into compact spindles with a very large axial ratio.

UR - https://www.scopus.com/pages/publications/84863239936

U2 - 10.1039/c2sm07100b

DO - 10.1039/c2sm07100b

M3 - 文章

AN - SCOPUS:84863239936

SN - 1744-683X

VL - 8

SP - 3131

EP - 3138

JO - Soft Matter

JF - Soft Matter

IS - 11

ER -

Self-assembly and photo-responsive behavior of novel ABC ₂-type block copolymers containing azobenzene moieties

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