Format

Send to

Choose Destination
J Am Chem Soc. 2009 Feb 11;131(5):1686-8. doi: 10.1021/ja807798g.

Light-operated mechanized nanoparticles.

Author information

1
Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, California 90095-1569, USA.

Abstract

Mesoporous silica (MCM-41) nanoparticles modified by azobenzene derivatives, capable of storing small molecules and releasing them following light irradiation, have been fabricated and characterized. In the presence of the beta-cyclodextrin and/or pyrene-modified beta-cyclodextrin rings, the beta-cyclodextrin and/or pyrene-modified beta-cyclodextrin rings will thread onto the azobenzene-containing stalks and bind to trans-azobenzene units to form the pseudorotaxanes, thus sealing the nanopores and stopping release of the cargo. Upon irradiation, the isomerization of trans-to-cis azobenzene units leads to the dissociation of the beta-cyclodextrin and/or pyrene-modified beta-cyclodextrin rings from the stalks, thus opening the gates to the nanopores and releasing the cargo.

PMID:
19159224
DOI:
10.1021/ja807798g
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center