A cyanide-responsive supramolecular nanovalve based on Pd( ii )-templated pseudo-rotaxane

We report here the design and synthesis of a nanovalve system consisting of a carrier based on mesoporous silica nanoparticles and mechanized with a square planar Pd( ii )-templated pseudo-rotaxane. This nanovalve was responsive to demetalation by cyanide anions, followed by the concomitant release...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-01, Vol.3 (12), p.6414-6422
Main Authors: Ramakrishnam Raju, Mandapati V., Lin, Hong-Cheu
Format: Article
Language:English
Subjects:
Anions
Carriers
Dyes
Indicators
Nanostructure
Palladium
Pyridines
Spectroscopy
Sustainability
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Summary:We report here the design and synthesis of a nanovalve system consisting of a carrier based on mesoporous silica nanoparticles and mechanized with a square planar Pd( ii )-templated pseudo-rotaxane. This nanovalve was responsive to demetalation by cyanide anions, followed by the concomitant release of both the macrocycles and the contents of the pores, in this instance dye indicators. Gate-keeping of the mesopores was achieved by the formation of an intact coordination between the monodentate pyridine axles soluble in aqueous solution and the tridentate macrocycle Pd complex via a square planar metal template approach. A facile nanovalve system responsive to an anionic stimulus was therefore developed. Luminescence spectrometry was successfully used to demonstrate that the anion-stimulated dye release from the nanovalves gated by the Pd( ii ) metal template was independent of pH.
ISSN:2050-7488
2050-7496
DOI:10.1039/C4TA06316C