Living Crystallization-Driven Self-Assembly of Oligo(<italic style="font-style: italic">p</italic>-phenylene vinylene)-Containing Block Copolymers: Impact of Branched Structure of Alkyl Side Chain of <italic style="font-style: italic">π</italic>-Conjugated Segment

Yang Song; Bo Xiang; Xiao-Yu Huang; Guo-Lin Lu; Chun Feng

doi:10.1007/s10118-023-2893-7

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Living Crystallization-Driven Self-Assembly of Oligo(p-phenylene vinylene)-Containing Block Copolymers: Impact of Branched Structure of Alkyl Side Chain of π-Conjugated Segment

RESEARCH ARTICLE | Updated：2023-03-07

- Living Crystallization-Driven Self-Assembly of Oligo(p-phenylene vinylene)-Containing Block Copolymers: Impact of Branched Structure of Alkyl Side Chain of π-Conjugated Segment
- Chinese Journal of Polymer Science Vol. 41, Issue 4, Pages: 574-584(2023)
- Affiliations：
  
  a.School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
  b.Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
  c.Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Author bio：
  
  xyhuang@mail.sioc.ac.cn (X.Y.H.)
  cfeng@ecust.edu.cn (C.F.)
- Funds：
- DOI：10.1007/s10118-023-2893-7
  CLC：
- Received：01 October 2022，
  
  Revised：2022-10-17，
  
  Accepted：24 October 2022，
  
  Online First：19 December 2022，
  
  Published：01 April 2023
- Accepted：
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Song, Y.; Xiang, B.; Huang, X. Y.; Lu, G. L.; Feng, C. Living crystallization-driven self-assembly of oligo(p-phenylene vinylene)-containing block copolymers: impact of branched structure of alkyl side chain of π-conjugated segment. Chinese J. Polym. Sci. 2023, 41, 574–584

Yang Song, Bo Xiang, Xiao-Yu Huang, et al. Living Crystallization-Driven Self-Assembly of Oligo(p-phenylene vinylene)-Containing Block Copolymers: Impact of Branched Structure of Alkyl Side Chain of π-Conjugated Segment[J]. Chinese Journal of Polymer Science, 2023, 41(4): 574-584. DOI: 10.1007/s10118-023-2893-7.
Song, Y.; Xiang, B.; Huang, X. Y.; Lu, G. L.; Feng, C. Living crystallization-driven self-assembly of oligo(p-phenylene vinylene)-containing block copolymers: impact of branched structure of alkyl side chain of π-conjugated segment. Chinese J. Polym. Sci. 2023, 41, 574–584 DOI： 10.1007/s10118-023-2893-7.

Yang Song, Bo Xiang, Xiao-Yu Huang, et al. Living Crystallization-Driven Self-Assembly of Oligo(p-phenylene vinylene)-Containing Block Copolymers: Impact of Branched Structure of Alkyl Side Chain of π-Conjugated Segment[J]. Chinese Journal of Polymer Science, 2023, 41(4): 574-584. DOI: 10.1007/s10118-023-2893-7. DOI：

摘要

This work indicates that the structure of alkyl side chains of OPV segments plays an important role in determining the crystallization-driven self-assembled behaviors of OPV-based block copolymers. It is the steric repulsion effect induced by branched alkyl side chains

not stereoregular effect

that would promote self-nucleation in crystallization-driven micellar elongation.

Abstract

The structure of side chains of

-conjugated segments is a critical factor determining living crystallization-driven self-assembly (CDSA)

a versatile platform to generate fiber-like nanostructures with precise length and composition. Herein

we design and synthesize three block copolymers (BCPs) containing same corona-forming poly(

-isopropyl acrylamide) (PNIPAM) segment

but different core-forming

-conjugated oligo(

-phenylene vinylene) (OPV) with linear pentyl (l-OPV)

racemic 2-methyl butyl (r-OPV) and stereo-regular chiral (

)-2-methyl butyl (c-OPV) side chains

respectively. By using these BCPs of l-OPV-

-PNIPAM

r-OPV-

-PNIPAM

and c-OPV-

-PNIPAM

as model

we aim to get a deep insight into how steric and stereo-regular effect induced by branched alkyl side chains of OPV segment affects the living CDSA. The results showed that l-OPV-

-PNIPAM

exhibits typical characteristics of self-seeding and seeded growth of living CDSA to give uniform fiber-like micelles of controlled length. On the contrary

r-OPV-

-PNIPAM

and c-OPV-

-PNIPAM

with branched racemic and stereo-regular chiral alkyl side chains are more prone to self-nucleation during the micellar elongation to give short and polydisperse fiber-like micelles. The obvious self-nucleation during the micellar elongation of r-OPV-

-PNIPAM

and c-OPV-

-PNIPAM

is due to the increase of steric repulsion with OPV units induced by branched alkyl side chains

not the stereo-irregular effect of racemic alkyl side chains.

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Living Crystallization-Driven Self-Assembly of Oligo(p-phenylene vinylene)-Containing Block Copolymers: Impact of Branched Structure of Alkyl Side Chain of π-Conjugated Segment

DOI：10.1007/s10118-023-2893-7

摘要

Abstract

关键词

Keywords

references