Thermal and photochemical switching of conformation of poly(ethylene glycol)-substituted cyclodextrin with an azobenzene group at the chain end

Youhei Inoue, Paul Kuad, Yasushi Okumura, Yoshinori Takashima, Hiroyasu Yamaguchi, Akira Harada

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

Poly(ethylene glycol) (PEG)-substituted cyclodextrin (CD) with an azobenzene group at the terminal of the PEG chain (6-Az-PEG600-HyCiO-β-CD) was synthesized. The conformation of 6-Az-PEG600-HyCiO-β-CD in aqueous solution could be controlled thermally and photochemically. At low concentration, 6-trans-Az-PEG600-HyCiO-β-CD formed different types of self-inclusion complexes or existed in a dethreading form depending on the temperature, while at high concentration, an intermolecular complex was formed. Moreover, UV-light irradiation induced a conformational change to a self-inclusion complex where the CD cavity included the azobenzene part regardless of the concentration.

Original languageEnglish
Pages (from-to)6396-6397
Number of pages2
JournalJournal of the American Chemical Society
Volume129
Issue number20
DOIs
Publication statusPublished - May 23 2007
Externally publishedYes

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Azobenzene
Ethylene Glycol
Cyclodextrins
Polyethylene glycols
Conformations
Hot Temperature
Ultraviolet Rays
Ultraviolet radiation
azobenzene
Irradiation
Temperature

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Thermal and photochemical switching of conformation of poly(ethylene glycol)-substituted cyclodextrin with an azobenzene group at the chain end. / Inoue, Youhei; Kuad, Paul; Okumura, Yasushi; Takashima, Yoshinori; Yamaguchi, Hiroyasu; Harada, Akira.

In: Journal of the American Chemical Society, Vol. 129, No. 20, 23.05.2007, p. 6396-6397.

Research output: Contribution to journalArticle

Inoue, Youhei ; Kuad, Paul ; Okumura, Yasushi ; Takashima, Yoshinori ; Yamaguchi, Hiroyasu ; Harada, Akira. / Thermal and photochemical switching of conformation of poly(ethylene glycol)-substituted cyclodextrin with an azobenzene group at the chain end. In: Journal of the American Chemical Society. 2007 ; Vol. 129, No. 20. pp. 6396-6397.
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