TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=34249043946&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249043946&partnerID=8YFLogxK
U2 - 10.1021/ja071717q
DO - 10.1021/ja071717q
M3 - Article
C2 - 17461590
AN - SCOPUS:34249043946
VL - 129
SP - 6396
EP - 6397
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 20
ER -