Herein we report a novel “supra-prodrug-type” superamphiphile design: via a redox-sensitive self-immolative linker, a hydrophobic drug molecule was labeled with an azobenzene moiety, which was designed to be capped by a hydrophilic cyclodextrin (CD) molecule.
Photocontrolled Self-Assembly and Disassembly of Block Ionomer Complex Vesicles: A Facile Approach toward Supramolecular Polymer Nanocontainers
作者:Yapei Wang、Peng Han、Huaping Xu、Zhiqiang Wang、Xi Zhang、Alexander V. Kabanov
DOI:10.1021/la9023844
日期:2010.1.19
A new concept of designing a photocontrollable supramolecularpolymer nanocontainer through the electrostatic association between an azobenzene-containing surfactant (AzoC10) and a double-hydrophilic block ionomer, poly(ethylene glycol)-b-poly(acrylic acid) (PEG43−PAA153), is described. Such a block ionomer complex can self-assemble in aqueous solution and form vesicle-like aggregates, which are composed
Fluorescence Modulation via Isomer-Dependent Energy Transfer in an Azobenzene-Functionalized Poly(phenylenevinylene) Derivative
作者:Elizabeth J. Harbron、Diego A. Vicente、Mirth T. Hoyt
DOI:10.1021/jp045651m
日期:2004.12.1
Fluorescence studies of poly(2-methoxy-5-(4-(phenylazo)phenyl-4'-(1,10-dioxydecyl))-1,4-phenylenevinylene) (MPA-10-PPV), a PPV derivative with alkyl-tethered azobenzene side chains that was first synthesized by Yoshino and co-workers, are presented. The emission intensity of MPA-10-PPV in dilute solution is partially quenched by energy transfer from the PPV backbone to the azobenzene side chains, and the energy transfer is more efficient to the cis azobenzene isomer than to the trans. Because of this differential, the emission intensity can be reversibly modulated by controlling the isomeric form of the azobenzene side chain with light. The energy transfer process sensitizes the cis to trans azobenzene isomerization, and this additional isomerization pathway alters the composition of the azobenzene photostationary state in MPA-10-PPV.
Tuning surface wettability through photocontrolled reversible molecular shuttle
A photocontrolled molecularshuttle SAM based on an alpha-cyclodextrin (alpha-CD)/azobenzene inclusion complex on rough gold surfaces is fabricated, which can reversibly switch the surface wettability by transferring external energy (light) to molecular mechanical motion.