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

Mandapati V. Ramakrishnam Raju, Hong Cheu Lin

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7 Scopus citations


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. This journal is

Original languageEnglish (US)
Pages (from-to)6414-6422
Number of pages9
JournalJournal of Materials Chemistry A
Issue number12
StatePublished - Mar 28 2015


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