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 wi...

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Bibliographic Details
Published in:Langmuir 2013-03, Vol.29 (10), p.3188-3194
Main Authors: Dong, Zhen-Qiang, Cao, Ya, Han, Xiao-Juan, Fan, Min-Min, Yuan, Qi-Juan, Wang, Yi-Fu, Li, Bang-Jing, Zhang, Sheng
Format: Article
Language:English
Subjects:
alpha-Cyclodextrins - chemistry
Benzoic Acid - chemistry
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Micelles
Micelles. Thin films
Models, Theoretical
Polymers - chemistry
Surface-Active Agents - chemistry
Trimethyl Ammonium Compounds - chemistry
Ultraviolet Rays
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Summary: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.
ISSN:0743-7463
1520-5827
DOI:10.1021/la304101e