Nitrile-functionalized ruthenium nanoparticles : charge delocalization through Ru − N ≡ C interface

Content Provider	Semantic Scholar
Author	Zhang, Fengqi Huang, Lin Yan, Jinwu Kang, Xiongwu Chen, Shaowei
Copyright Year	2017
Abstract	Ruthenium nanoparticles (2.06 ± 0.46 nm in diameter) were stabilized by the self-assembly of nitrile molecules onto the ruthenium colloid surface by virtue of the formation of Ru−N≡C interfacial bonding linkages. Thermogravimetric analysis showed that there were about 63 nitrile ligands per nanoparticle, corresponding to an average molecular footprint of 22.4 Å. Proton nuclear magnetic resonance (NMR) studies suggested an end-on configuration of the nitrile moiety on the metal core surface. Meanwhile, infrared measurements showed that the C≡N stretch red-shifted from 2246 to 1944 cm upon adsorption on the nanoparticle surfaces, as confirmed by N isotopic labeling. This apparent red-shift suggests extensive intraparticle charge delocalization, which was further manifested by photoluminescence measurements of 1-cyanopyrene-functionalized ruthenium nanoparticles that exhibited a red shift of 40 nm of the emission maximum, in comparison to that of free monomers. The results further highlight the significance ofmetal−organic contacts in the manipulation of the dynamics of intraparticle charge transfer and the nanoparticle optical and electronic properties.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://chen.chemistry.ucsc.edu/Ru-nitrile.pdf
Language	English
Access Restriction	Open
Subject Keyword	Artificial nanoparticles Colloids Diameter (qualifier value) Electrons Interface Device Component Ligands Magnetic Resonance Imaging Molecular orbital Nitriles Open XML Paper Specification Protons Pyschological Bonding Redshift Ruthenium Self-assembly Spectroscopy, Fourier Transform Infrared TBX1 wt Allele Truevision TGA X-Ray Photoelectron Spectroscopy monomer newton pyrene
Content Type	Text
Resource Type	Article