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Issue 12, 2015
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A cyanide-responsive supramolecular nanovalve based on Pd(ii)-templated pseudo-rotaxane

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Abstract

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.

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

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Supplementary files

Article information


Submitted
19 Nov 2014
Accepted
05 Feb 2015
First published
06 Feb 2015

J. Mater. Chem. A, 2015,3, 6414-6422
Article type
Paper
Author version available

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

M. V. Ramakrishnam Raju and H. Lin, J. Mater. Chem. A, 2015, 3, 6414 DOI: 10.1039/C4TA06316C

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