Synthesis and characterization of a temperature-responsive amphiphilic block copolymer containing a liquid crystalline unit

Masamichi Nishihara; Yoshihiko Murakami; Takashi Shinoda; Jun Yamamoto; Masayuki Yokoyama

doi:10.1246/cl.2008.1214

Synthesis and characterization of a temperature-responsive amphiphilic block copolymer containing a liquid crystalline unit

Masamichi Nishihara, Yoshihiko Murakami, Takashi Shinoda, Jun Yamamoto, Masayuki Yokoyama

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

10 Citations (Scopus)

Abstract

To create a stimuli-responsive micelle, we synthesized a novel temperature-responsive amphiphilic block copolymer, poly(ethylene glycol)-block-poly{6-[4-(4-pyridylazo)phenoxy]-hexyl methacrylate} [PEG-b-P(AzoPyl)], by undertaking the RAFT polymerization of an AzoPyl monomer with a PEG mac-ro-RAFT reagent. This block copolymer possesses a liquid crystalline unit derived from a hydrophobic AzoPyl/carboxylic acid complex. The PEG-b-P(AzoPyl/decanoic acid (C ₉COOH)) complex formed a micelle structure (weight-average diameter = 68 nm). DSC results confirmed that the PEG-b-P(AzoPyl/C ₉COOH) micellar solution exhibited thermodynamic phase-transition behavior.

Original language	English
Pages (from-to)	1214-1215
Number of pages	2
Journal	Chemistry Letters
Volume	37
Issue number	12
DOIs	https://doi.org/10.1246/cl.2008.1214
Publication status	Published - 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)

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title = "Synthesis and characterization of a temperature-responsive amphiphilic block copolymer containing a liquid crystalline unit",

abstract = "To create a stimuli-responsive micelle, we synthesized a novel temperature-responsive amphiphilic block copolymer, poly(ethylene glycol)-block-poly{6-[4-(4-pyridylazo)phenoxy]-hexyl methacrylate} [PEG-b-P(AzoPyl)], by undertaking the RAFT polymerization of an AzoPyl monomer with a PEG mac-ro-RAFT reagent. This block copolymer possesses a liquid crystalline unit derived from a hydrophobic AzoPyl/carboxylic acid complex. The PEG-b-P(AzoPyl/decanoic acid (C 9COOH)) complex formed a micelle structure (weight-average diameter = 68 nm). DSC results confirmed that the PEG-b-P(AzoPyl/C 9COOH) micellar solution exhibited thermodynamic phase-transition behavior.",

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AU - Nishihara, Masamichi

AU - Murakami, Yoshihiko

AU - Shinoda, Takashi

AU - Yamamoto, Jun

AU - Yokoyama, Masayuki

PY - 2008

Y1 - 2008

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AB - To create a stimuli-responsive micelle, we synthesized a novel temperature-responsive amphiphilic block copolymer, poly(ethylene glycol)-block-poly{6-[4-(4-pyridylazo)phenoxy]-hexyl methacrylate} [PEG-b-P(AzoPyl)], by undertaking the RAFT polymerization of an AzoPyl monomer with a PEG mac-ro-RAFT reagent. This block copolymer possesses a liquid crystalline unit derived from a hydrophobic AzoPyl/carboxylic acid complex. The PEG-b-P(AzoPyl/decanoic acid (C 9COOH)) complex formed a micelle structure (weight-average diameter = 68 nm). DSC results confirmed that the PEG-b-P(AzoPyl/C 9COOH) micellar solution exhibited thermodynamic phase-transition behavior.

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