pH clock-operated mechanized nanoparticles.
Mechanized nanoparticles (MNPs) consisting of supramolecular machines attached to the surface of mesoporous silica nanoparticles are designed to release encapsulated guest molecules controllably under pH activation. The molecular machines are comprised of cucurbit[6]uril (CB[6]) rings that encircle tethered trisammonium stalks and can be tuned to respond under specific pH conditions through chemical modification of the stalks. Luminescence spectroscopy demonstrates that the MNPs are able to contain guest molecules within nanopores at neutral pH levels and then release them once the pH is lowered or raised.
Angelos
Sarah
S
Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
Khashab
Niveen M
NM
Yang
Ying-Wei
YW
Trabolsi
Ali
A
Khatib
Hussam A
HA
Stoddart
J Fraser
JF
Zink
Jeffrey I
JI
D003692:Delayed-Action Preparations / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053758:Nanoparticles / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
D003692:Delayed-Action Preparations; D012822:Silicon Dioxide