Size-selective pH-operated megagates on mesoporous silica materials

Min Xue; Dennis Cao; J. Fraser Stoddart; Jeffrey I. Zink

doi:10.1039/c2nr32170j

Size-selective pH-operated megagates on mesoporous silica materials

Min Xue, Dennis Cao, J. Fraser Stoddart, Jeffrey I. Zink^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

pH-responsive megagates have been fabricated around mesoporous silica material SBA-15 in order to mechanize the mesopores. These megagates remain closed in neutral conditions, but open at pH 5. The capping components of the megagates were designed to be capable of controlling pores up to 6.5 nm in diameter. Selectivity of payloads with different sizes can be achieved through the use of different capping components. The operation of the megagates was demonstrated by time-resolved fluorescence spectroscopy which is capable of monitoring the release of both the payload and the cap. This study opens up new possibilities in the field of controllable release.

Original language	English (US)
Pages (from-to)	7569-7574
Number of pages	6
Journal	Nanoscale
Volume	4
Issue number	23
DOIs	https://doi.org/10.1039/c2nr32170j
State	Published - Dec 7 2012

ASJC Scopus subject areas

General Materials Science

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Size-selective pH-operated megagates on mesoporous silica materials

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