A mono-protonated (bis(4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine)iron(ii)) complex [[Fe(ptpy)(Hptpy)](PF6)3] acts as a structure directing agent for larger gold colloids in the present investigation. We report here a H-bonded [Fe(ptpy)(Hptpy)](PF6)3 complex acting as an inter-linker for the complex-mediated growth of gold nanoparticles. This exploration discusses the possibility of proton switching in [Fe(ptpy)(Hptpy)](PF6)3, which can interconvert the oxidation state of Fe between +2 and +3 at the interface of citrate-capped gold nanoparticles, enabling the complex-mediated growth of geometry-specific, large size gold colloids. © 2016 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

Archita Patnaik

Department Of Chemistry

Geevarghese Vadakken Jacob

carboxylic acid

citric acid

COLLOIDAL GOLD

gold nanoparticle

Hydrogen

Iron

metal organic framework

proton

unclassified drug

[BIS(4' (4 PYRIDYL) 2,2':6',2'' TERPYRIDINE]IRON COMPLEX

Absorption

article

Crystal Structure

Crystallization

electron transport

oxidation

oxidation reduction potential

particle size

priority journal

proton transport

synthesis

Thermodynamics

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

New Journal of Chemistry

A functionalized fullerene-C60-thiol mediated gold nanocomposite was realized using dl-homocysteine as a bifunctional ligand. The nanocomposite was designed by following electronic structure calculations via the DFT formalism. The computed electrostatic potential profile and the electronic HOMO-LUMO energy gap implied enhanced electron transport across the nanocomposite skeleton. Accordingly, synthesis of the nanocomposite proceeded with the hydrophilic fullerene-C60 thiol derivative via in situ reduction of gold(iii), resulting in sterically full gold clusters bound to the fullerene-C60 core. Molecular dynamics simulations with the MM+ force field provided insight into the mode of interaction and direction of electron transfer in the nanocomposite-histidine ensemble. Subsequently, an electrochemical strategy for l-histidine sensing was proposed; the nanocomposite-modified glassy carbon electrode exhibited electrocatalytic activity towards l-histidine sensing, studied via cyclic and square wave voltammetry and impedance spectroscopy. A femtomolar l-histidine sensor, the first of its kind with orders of magnitude enhanced performance in its detection limit, linear range, sensitivity, stability and specificity, and free of interference, thus emerged. © 2017 The Royal Society of Chemistry.

Journal of Materials Chemistry B

Structure and dynamics of a dl-homocysteine functionalized fullerene-C60-gold nanocomposite: A femtomolar l-histidine sensor

On the formation of gold nanoparticles from [AuIIICl4]− and a non-classical reduced polyoxomolybdate as an electron source: a quantum mechanical modelling and experimental study

Chemical Science

Marcus-type driving force correlations reveal the mechanism of proton-coupled electron transfer for phenols and [Ru(bpy)3]3+ in water at low pH

Physical Chemistry Chemical Physics

Proton coupled electron transfer from the excited state of a ruthenium(ii) pyridylimidazole complex

The Journal of Physical Chemistry C

Concerted Electron–Proton Transfer (EPT) in the Oxidation of Cysteine

Proceedings of the National Academy of Sciences

PNAS Plus Significance Statements

Proton switching as a driving force for the metal-organic complex-mediated growth of gold colloids

Journal	Data powered by TypesetNew Journal of Chemistry
Publisher	Data powered by TypesetRoyal Society of Chemistry
ISSN	11440546
Open Access	No