In situ SERS monitored photoactive yellow protein (PYP) chromophore model elimination, nano-catalyzed phenyl redox and I2 addition reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 111144-111147
Author(s):  
Wei Li ◽  
Wenlei Chu ◽  
Wen Jin ◽  
Xijiang Han ◽  
Yufei Ma ◽  
...  
Keyword(s):  
Double Bond ◽  
Photoactive Yellow Protein ◽  
Addition Reactions ◽  
Amino Group ◽  
Model Elimination ◽  
Redox Cycle ◽  
Au Nps

PhS nitration products absorbed on Ag/Au NPs underwent nitro- and amino-group redox cycle reactions monitored using SERS spectra. I2 addition to the CC double bond was also confirmed with SERS.

Addition of secondary amino group to double bond of acrylates

1988 ◽  
Vol 53 (4) ◽  
pp. 833-838 ◽  
Author(s):  
Jiří Horálek ◽  
Emil Krejcar ◽  
Jaroslav Churáček
Keyword(s):  
Double Bond ◽  
Addition Reaction ◽  
Addition Reactions ◽  
Amino Group ◽  
Amino Groups ◽  
Bimolecular Reactions ◽  
Tert Butyl ◽  
Near Ir ◽  
Secondary Amino ◽  
Respective Rate

The near IR region spectroscopy has been used to follow the addition reactions of the secondary amino groups of the tert-butyl 3-butylaminopropanoate, N,N'-dibutyl-3-aminopropanamide, and dibutylamine to tert-butyl acrylate. The additions are bimolecular reactions of the second order. The respective rate constants found for the above-mentioned compounds are 3·54 . 10-6, 2·34 . 10-5, and 3·18 . 10-6 l mol-1 s-1. The secondary amidic groups increase the nucleophilicity of secondary amino group and hence also the rate of the addition reaction.

scholarly journals Synthesis of a sucrose dimer with enone tether; a study on its functionalization

2014 ◽  
Vol 10 ◽  
pp. 1246-1254 ◽  
Author(s):  
Zbigniew Pakulski ◽  
Norbert Gajda ◽  
Magdalena Jawiczuk ◽  
Jadwiga Frelek ◽  
Piotr Cmoch ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Double Bond ◽  
Carbonyl Group ◽  
Osmium Tetroxide ◽  
Cd Spectroscopy ◽  
Allylic Alcohol ◽  
Circular Dichroïsm

The reaction of appropriately functionalized sucrose phosphonate with sucrose aldehyde afforded a dimer composed of two sucrose units connected via their C6-positions (‘the glucose ends’). The carbonyl group in this product (enone) was stereoselectively reduced with zinc borohydride and the double bond (after protection of the allylic alcohol formed after reduction) was oxidized with osmium tetroxide to a diol. Absolute configurations of the allylic alcohol as well as the diol were determined by circular dichroism (CD) spectroscopy using the in situ dimolybdenum methodology.

scholarly journals Easy and fast in-situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles

2021 ◽  
Author(s):  
Salvatore Moschetto ◽  
Andrea Ienco ◽  
Gabriele Manca ◽  
Manuel Serrano-Ruiz ◽  
Maurizio Peruzzini ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Black Phosphorus ◽  
Au Nps ◽  
In Situ Functionalization

Heterostructures of single- and few-layer black phosphorus (2D bP) functionalized with gold nanoparticles (Au NPs) have been recently reported in the literature, exploiting their intriguing properties and biocompatibility for catalytic,...

Macroscopical monolayer films of ordered arrays of gold nanoparticles as SERS substrates for in-situ quantitative detection in aqueous solutions

Nanoscale ◽  
2021 ◽  
Author(s):  
Lixiang Xing ◽  
Cui Wang ◽  
Yi Cao ◽  
Jihui Zhang ◽  
Haibing Xia
Keyword(s):  
Gold Nanoparticles ◽  
Volume Fraction ◽  
Water Volume ◽  
Quantitative Detection ◽  
Monolayer Films ◽  
Au Nps ◽  
Sers Substrates ◽  
Ordered Arrays ◽  
Water Volume Fraction

In this work, macroscopical monolayer films of ordered arrays of gold nanoparticles (MMF-OA-Au NPs) are successfully prepared at the interfaces of toluene-diethylene glycol (DEG) with a water volume fraction of...

Highly-efficient and autocatalytic reduction of NaHCO3 into formate by in situ hydrogen from water splitting with metal/metal oxide redox cycle

2017 ◽  
Vol 26 (5) ◽  
pp. 881-890 ◽  
Author(s):  
Guodong Yao ◽  
Jia Duo ◽  
Binbin Jin ◽  
Heng Zhong ◽  
Lingyun Lyu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Redox Cycle ◽  
Highly Efficient ◽  
Metal Metal

A novel photoelectrode based on eosin Y–rhodamine B duo-dye sensitized Au nanoparticles by in situ reduction

2017 ◽  
Vol 9 (38) ◽  
pp. 5586-5592 ◽  
Author(s):  
Y. L. Yuan ◽  
G. M. Pang ◽  
X. K. Li ◽  
W. Y. Zhu ◽  
H. C. Pan
Keyword(s):  
Rhodamine B ◽  
Au Nanoparticles ◽  
Specific Response ◽  
Eosin Y ◽  
In Situ Reduction ◽  
Au Nps ◽  
Dye Sensitized ◽  
Novel Strategy

A novel strategy for the fabrication of a photoelectrochemical system, involving a duo-dye sensitized Au NPs composite, that displays a specific response to mercury.

Au-on-Ag nanostructure for in-situ SERS monitoring of catalytic reactions

2022 ◽  
Author(s):  
Shuyue He ◽  
Di Wu ◽  
Siwei Chen ◽  
Kai Liu ◽  
Eui-Hyeok Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Thermal Evaporation ◽  
Reduction Process ◽  
Ag Nps ◽  
Au Nps ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Raman Probe

Abstract Dual-functionality Au-on-Ag nanostructures (AOA) were fabricated on a silicon substrate by first immobilizing citrate-reduced Ag nanoparticles (Ag NPs, ~43 nm in diameter), followed by depositing ~7 nm Au nanofilms (Au NFs) via thermal evaporation. Au NFs were introduced for their catalytic activity in concave-convex nano-configuration. Ag NPs underneath were used for their significant enhancement factor (EF) in surface-enhanced Raman scattering (SERS)-based measurements of analytes of interest. Rhodamine 6G (R6G) was utilized as the Raman-probe to evaluate the SERS sensitivity of AOA. The SERS EF of AOA is ~37 times than that of Au NPs. Using reduction of 4-nitrothiophenol (4-NTP) by sodium borohydride (NaBH4) as a model reaction, we demonstrated the robust catalytic activity of AOA as well as its capacity to continuously monitor via SERS the disappearance of reactant 4-NTP, emergence and disappearance of intermediate 4, 4’-DMAB, and the appearance of product 4-ATP throughout the reduction process in real-time and in situ.

Cu(II)-Catalyzed [3+2] Annulation of Thioamides with AIBN: Facile Access to Highly Functionalized Thiazolidine-4-ones

Synthesis ◽  
2021 ◽  
Author(s):  
Pragya Pali ◽  
Dhananjay Yadav ◽  
Gaurav Shukla ◽  
Maya Shankar Singh
Keyword(s):  
Double Bond ◽  
Functional Groups ◽  
Dual Role ◽  
Direct Access ◽  
One Pot ◽  
Simple Method ◽  
Two Component ◽  
Thiazolidine Ring ◽  
Coupling Partner

An efficient and versatile copper-catalyzed unprecedented intermolecular radical [3 + 2] annulation of thioamides with azobisisobutyronitrile (AIBN) is described. This two-component one-pot copper(II)-catalyzed transformation has been achieved via cascade formation of C-S/C−N bonds through the cyclization of in situ generated N,S-acetal intermediate from β-ketothioamide. This operationally simple method allows direct access to synthetically demanding thiazolidin-4-ones in good to excellent yields containing diverse functional groups of different electronic and steric nature. Remarkably, the readily available reaction partners, avoidance of expensive/toxic reagents and the gram scale synthesis are additional attributes to this strategy. AIBN here plays a dual role as radical initiator and unusual source of two carbon coupling partner. Notably, the products possess Z-stereochemistry with regard to the exocyclic C=C double bond at the 2-position of the thiazolidine ring.

Sign in / Sign up

Export Citation Format

Share Document