Photoreversible polymer-surfactant micelles using the molecular recognition of α-cyclodextrin.
Photoreversible micelles were achieved by a combination of commercially available components sodium alginate (Alg), tetradecyltrimethylammonium bromide (TTAB), α-cyclodextrin (α-CD), and 4-(phenylazo)benzoic acid (PBA). Under visible light irradiation, α-CD interacted more favorably with PBA than with alkyl chains of TTAB. Therefore, polymer-surfactant micelles were formed by the self-assembly of Alg and TTAB through electrostatic attraction. After UV irradiation, micelles were disrupted because PBA in the cis form lost its ability to complex with α-CD, and then the latter was interacted with TTAB to prevent the association of alkyl chains of TTAB. On alternating irradiation of this quaternary system with UV and visible light, this reversible micellization process can be recycled many times.
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
Zhen-Qiang
ZQ
Dong
Ya
Y
Cao
Xiao-Juan
XJ
Han
Min-Min
MM
Fan
Qi-Juan
QJ
Yuan
Yi-Fu
YF
Wang
Bang-Jing
BJ
Li
Sheng
S
Zhang
D019817:Benzoic Acid / Q000737:chemistry; D008823:Micelles; D008962:Models, Theoretical; D011108:Polymers / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D050337:Trimethyl Ammonium Compounds / Q000737:chemistry; D014466:Ultraviolet Rays; D047391:alpha-Cyclodextrins / Q000737:chemistry*
D008823:Micelles; D011108:Polymers; D013501:Surface-Active Agents; D050337:Trimethyl Ammonium Compounds; D047391:alpha-Cyclodextrins; D019817:Benzoic Acid; C009410:tetradecyltrimethylammonium; C032613:alpha-cyclodextrin