Hexaniobate Cluster Anion Monolayers on Gold Nanoparticles: A New Structural Role for Alkali Metal Countercations

Shelly Sharet Leiser, Libi Polin, Gal Gan-Or, Manoj Raula, Ira A. Weinstock

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Monolayer shells of polyoxotungstate cluster anions on gold nanoparticles in water were electrostatically stabilized by structurally integrated countercations, with formation constants, K, increasing in the order: Li + < Na + < K + < TMA + < Cs + (TMA + = tetramethylammonium). We now report that for hexaniobate cluster anions, K values increase in the same order, with the notable exception of TMA + , which is effectively unable to induce monolayer formation. These findings point to a new structural model in which hexaniobate anions form a spherical coordination polymer at the gold surface with alkali metal countercations serving as single-atom structural building units between hexaniobate linkers.

Original languageEnglish
Pages (from-to)1012-1015
Number of pages4
JournalInorganic Chemistry
Volume58
Issue number2
DOIs
StatePublished - 22 Jan 2019

Fingerprint

Dive into the research topics of 'Hexaniobate Cluster Anion Monolayers on Gold Nanoparticles: A New Structural Role for Alkali Metal Countercations'. Together they form a unique fingerprint.

Cite this