Chiral metal nanoparticles encapsulated by a chiral phosphine cavitand with the tetrakis-BINAP moiety: their remarkable stability toward ligand exchange and thermal racemization

2016 ◽  
Vol 45 (11) ◽  
pp. 4486-4490 ◽  
Author(s):  
Ryo Nishimura ◽  
Ryo Yasutake ◽  
Shota Yamada ◽  
Koji Sawai ◽  
Kazuki Noura ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Ligand Exchange ◽  
Au Nanoparticles

A chiral phosphine cavitand1induced the formation of chiral metal (Ru, Rh, Pd, Ag, Pt, and Au) nanoparticles (NPs). The ligand1of the chiral metal NPs prevents both thermal racemization and ligand exchange with a thiol.

Mechanistic aspects of ligand exchange in Au nanoparticles

2008 ◽  
Vol 10 (33) ◽  
pp. 5029 ◽  
Author(s):  
A. Caragheorgheopol ◽  
V. Chechik
Keyword(s):  
Ligand Exchange ◽  
Au Nanoparticles

scholarly journals Green synthesis of Au nanoparticles using an aqueous extract ofStachys lavandulifoliaand their catalytic performance for alkyne/aldehyde/amine A3coupling reactions

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38186-38195 ◽  
Author(s):  
Hojat Veisi ◽  
Maliheh Farokhi ◽  
Mona Hamelian ◽  
Saba Hemmati
Keyword(s):  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Aqueous Extract ◽  
Reaction Rate ◽  
Au Nanoparticles ◽  
Catalytic Performance ◽  
High Reaction ◽  
High Reaction Rate

High reaction rate and easy availability make green synthesis of metal nanoparticles noticeable.

Probing the ligand exchange kinetics of phenynyl-based ligands on colloidal Au nanoparticles

2021 ◽  
Vol 5 (1) ◽  
pp. 465-471
Author(s):  
Ting Xiang ◽  
Jianpeng Zong ◽  
Wenjia Xu ◽  
Yuhua Feng ◽  
Hongyu Chen
Keyword(s):  
Real Time ◽  
Ligand Exchange ◽  
Au Nanoparticles ◽  
Relative Strength ◽  
Real Time Monitoring ◽  
Exchange Kinetics ◽  
Colloidal Au ◽  
Kinetics Of

We show that phenynyl ligand could readily bind to colloidal Au nanoparticles. By real-time monitoring the SERS during ligand exchange, the relative strength of phenynyls, thiols and PVP ligands, and different phenynyls were successfully ranked.

scholarly journals A mechano-colloidal approach for the controlled synthesis of metal nanoparticles

2019 ◽  
Vol 55 (95) ◽  
pp. 14267-14270 ◽  
Author(s):  
Paulo F. M. de Oliveira ◽  
Jhon Quiroz ◽  
Daniela C. de Oliveira ◽  
Pedro H. C. Camargo
Keyword(s):  
Metal Nanoparticles ◽  
Au Nanoparticles ◽  
Controlled Synthesis

We propose a mechano-colloidal approach marrying the attractive features of both mechanochemical and colloidal syntheses to produce well-defined Au nanoparticles.

Effects of crystallinity on sintering of metal nanoparticles

2019 ◽  
Vol 489 (5) ◽  
pp. 465-468
Author(s):  
V. M. Samsonov ◽  
I. V. Talyzin ◽  
S. A. Vasilyev ◽  
M. I. Alymov
Keyword(s):  
Molecular Dynamics ◽  
Metal Nanoparticles ◽  
Characteristic Time ◽  
Au Nanoparticles ◽  
Theoretical Models ◽  
Proportionality Coefficient

Regularities and mechanisms of coalescence of Au nanodroplets and sintering of solid Au nanoparticles have been investigated by using molecular dynamics and some theoretical models. It has been established that the characteristic time of coalescence t is proportional to radius r0 of initial nanodroplets. Both the above conclusion and some quantitative estimations of the proportionality coefficient between t and r0 agree with Frenkels theory (1946) though this theory was rut forward to describe coalescence of macroscopic droplets.

Enhanced Catalytic Activity of Magnetic Bimetallic Ag–Au Nanoparticles Mediated by Surface Plasmon Resonance

2021 ◽  
Vol 21 (5) ◽  
pp. 3107-3114
Author(s):  
Zhuo-Rui Li ◽  
Geng Zhu ◽  
Guo-Zhi Han
Keyword(s):  
Catalytic Activity ◽  
Surface Plasmon Resonance ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Noble Metal Nanoparticles

We firstly discover the enhanced catalytic activity of magnetic noble metal nanoparticles mediated by surface plasmon resonance. Under light irradiation with certain wavelength, the catalytic performance of magnetic noble metal nanoparticles shows changes with different degrees and directions that are associated with the surface plasmon resonance (SPR) of the noble metal. Moreover, the coupling of silver and gold allows the catalytic performance of magnetic bimetallic Ag–Au nanoparticles to show more positive response to surface plasmon resonance. The magnetic bimetallic Ag–Au nanoparticles show excellent catalytic performance toward the reduction reaction of aromatic nitro group, and corresponding rate constant of the catalytic reduction reaction increases about three times with light irradiation.

scholarly journals Metal nanoparticles reveal the organization of single-walled carbon nanotubes in bundles

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15753-15758 ◽  
Author(s):  
Raul D. Rodriguez ◽  
Thomas Blaudeck ◽  
Jana Kalbacova ◽  
Evgeniya Sheremet ◽  
Steffen Schulze ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Nanoparticles ◽  
Au Nanoparticles ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Single-walled carbon nanotubes (SWCNTs) were decorated with Ag and Au nanoparticles. The smaller SWCNTs in bundles are preferentially affected by the presence of metal nanoparticles. We postulate that smaller diameter SWCNTs surround larger ones.

Sign in / Sign up

Export Citation Format

Share Document