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

doi:10.1021/ja071717q

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 journal › Article › peer-review

140 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 language	English
Pages (from-to)	6396-6397
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	129
Issue number	20
DOIs	https://doi.org/10.1021/ja071717q
Publication status	Published - May 23 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja071717q

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

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.",

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T1 - Thermal and photochemical switching of conformation of poly(ethylene glycol)-substituted cyclodextrin with an azobenzene group at the chain end

AU - Inoue, Youhei

AU - Kuad, Paul

AU - Okumura, Yasushi

AU - Takashima, Yoshinori

AU - Yamaguchi, Hiroyasu

AU - Harada, Akira

PY - 2007/5/23

Y1 - 2007/5/23

N2 - 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.

AB - 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.

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

Abstract

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