Origin and Activity of Gold Nanoparticles as Aerobic Oxidation Catalysts in Aqueous Solution

2011 ◽  
Vol 133 (25) ◽  
pp. 9938-9947 ◽  
Author(s):  
Cheng Shang ◽  
Zhi-Pan Liu
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Aerobic Oxidation ◽  
Oxidation Catalysts

Amphiphilic block copolymer-stabilized gold nanoparticles for aerobic oxidation of alcohols in aqueous solution

2008 ◽  
pp. 4442 ◽  
Author(s):  
Xueguang Wang ◽  
Hajime Kawanami ◽  
Nazrul M. Islam ◽  
Maya Chattergee ◽  
Toshirou Yokoyama ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Block Copolymer ◽  
Aerobic Oxidation ◽  
Amphiphilic Block Copolymer ◽  
Oxidation Of Alcohols

Study of aerobic oxidation of phenyl PtII complexes (dpms)PtIIPh(L) (dpms = di(2-pyridyl)methanesulfonate; L = water, methanol, or aniline)

2009 ◽  
Vol 87 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Julia R Khusnutdinova ◽  
Peter Y Zavalij ◽  
Andrei N Vedernikov
Keyword(s):  
Aqueous Solution ◽  
Aerobic Oxidation ◽  
Reductive Elimination ◽  
High Yield ◽  
Ambient Conditions ◽  
Activation Barriers ◽  
Methanol Solutions ◽  
Anionic Species ◽  
Mechanism Of Oxidation ◽  
Solution Mechanism

Oxidation of phenyl PtII complexes K[(dpms)PtIIPh2], 1, (dpms)PtIIPh(MeOH), 2, (dpms)PtIIPh(OH2), 3, and methyl PtII complex (dpms)PtIIMe(NH2Ph), 6, with O2 in aqueous or methanol solutions under ambient conditions leads to corresponding (dpms)PtIVR(X)OH complexes (R = X = Ph, 7; R = Ph, X = OH, 8; R = Ph, X = OMe, 9; R = Me, X = NHPh; 11; dpms = di(2-pyridyl)methanesulfonate). Complexes 7–9 could be isolated in high yield. Complex 11 as well as its phenyl analogue (dpms)PtIVPh(NHPh)OH, 10 can be prepared in high yield by oxidation of corresponding (dpms)PtIIR(NH2Ph) with H2O2 in methanol. Phenyl PtII complexes (dpms)PtIIPh(HX) derived from HX = aniline and DMSO, 4 and 5, respectively, are inert toward O2. The rate of oxidation of 1–5 with O2 decreases in the order 1 > 3 ~ 2 » 4, and 5 is unreactive. Methyl analogues are significantly more reactive compared with their phenyl counterparts. Proposed mechanism of oxidation with O2 includes formation of anionic species (dpms)PtIIR(X)– responsible for reaction with dioxygen. Attempts at C–O and C–N reductive elimination from phenyl PtIV complexes 7–10 do not lead to phenyl derivatives PhX at 80–100 °C, consistent with the results of the DFT estimates of corresponding activation barriers, ΔG0 exceeding 28 kcal/mol.Key words: platinum phenyl complexes, oxidation, dioxygen, aqueous solution, mechanism.

Gold nanoparticles supported on magnesium oxide as catalysts for the aerobic oxidation of alcohols under alkali-free conditions

2012 ◽  
Vol 292 ◽  
pp. 148-156 ◽  
Author(s):  
Vinícius V. Costa ◽  
Miguel Estrada ◽  
Yulia Demidova ◽  
Igor Prosvirin ◽  
Vladimir Kriventsov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Magnesium Oxide ◽  
Aerobic Oxidation ◽  
Oxidation Of Alcohols

A Fluorescence Sensor for Lead (II) Ions Determination Based on Label-Free Gold Nanoparticles (GNPs)-DNAzyme Using Time-Gated Mode in Aqueous Solution

2016 ◽  
Vol 27 (2) ◽  
pp. 643-649 ◽  
Author(s):  
Xiao-Yu Wang ◽  
Cheng-Gang Niu ◽  
Li-Juan Guo ◽  
Liu-Yin Hu ◽  
Sheng-Quan Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Fluorescence Sensor ◽  
Label Free ◽  
Free Gold

Influence of Polyoxometalate Protecting Ligands on Catalytic Aerobic Oxidation at the Surfaces of Gold Nanoparticles in Water

2016 ◽  
Vol 56 (5) ◽  
pp. 2400-2408 ◽  
Author(s):  
Mingfu Zhang ◽  
Jingcheng Hao ◽  
Alevtina Neyman ◽  
Yifeng Wang ◽  
Ira A. Weinstock
Keyword(s):  
Gold Nanoparticles ◽  
Aerobic Oxidation

Gold Nanoparticles of Multiple Shapes Synthesized in l-Tryptophan Aqueous Solution

2018 ◽  
Vol 24 (5) ◽  
pp. 401-414
Author(s):  
Jinsheng Sun ◽  
Guangxin Liu ◽  
Sheng Fu ◽  
Fang Cai ◽  
Hong Yin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles
Sign in / Sign up

Export Citation Format

Share Document