Selective Cross-Dehydrogenative Coupling of N-Phenyltetrahydroisoquinolines in Aqueous Media Using Poly(Aniline Sulfonic Acid)/Gold Nanoparticles

Heterocycles ◽  
2012 ◽  
Vol 86 (2) ◽  
pp. 927 ◽  
Author(s):  
Toshikazu Hirao ◽  
Toru Amaya ◽  
Tsubasa Ito
Keyword(s):  
Gold Nanoparticles ◽  
Sulfonic Acid ◽  
Aqueous Media ◽  
Dehydrogenative Coupling ◽  
Poly Aniline

Transition-Metal-Free Synthetic Strategies for the Cross-Coupling Reactions in Water: A Green Approach

2020 ◽  
Vol 07 ◽  
Author(s):  
Tanmay Chatterjee ◽  
Nilanjana Mukherjee
Keyword(s):  
Transition Metal ◽  
Organic Solvents ◽  
Aqueous Media ◽  
Cross Coupling ◽  
Transition Metal Catalysts ◽  
Synthetic Methods ◽  
Coupling Reactions ◽  
Organic Transformations ◽  
Green Approach ◽  
Dehydrogenative Coupling

Abstract: A natural driving force is always working behind the synthetic organic chemists towards the development of ‘green’ synthetic methodologies for the synthesis of useful classes of organic molecules having potential applications. The majority of the essential classes of organic transformations, including C-C and C-X (X = heteroatom) bond-forming crosscoupling reactions, cross dehydrogenative-coupling (CDC) mostly rely on the requirement of transition-metal catalysts and hazardous organic solvents. Hence, the scope in developing green synthetic strategies by avoiding the use of transitionmetal catalysts and hazardous organic solvents for those important and useful classes of organic transformations is very high. Hence, several attempts are made so far. Water being the most abundant, cheap, and green solvent in the world; numerous synthetic methods have been developed in an aqueous medium. In this review, the development of transitionmetal- free green synthetic strategies for various important classes of organic transformations such as C-C and C-X bondforming cross-coupling, cross dehydrogenative-coupling, and oxidative-coupling in an aqueous media is discussed.

scholarly journals Correction: Poly(adenine)-mediated DNA-functionalized gold nanoparticles for sensitive detection of mercury ions in aqueous media

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 22691-22691
Author(s):  
Jinjin Yin ◽  
Jiuchao Wang ◽  
Xiyue Yang ◽  
Tao Wu ◽  
Huashan Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Media ◽  
Sensitive Detection ◽  
Mercury Ions ◽  
Functionalized Gold Nanoparticles

Correction for ‘Poly(adenine)-mediated DNA-functionalized gold nanoparticles for sensitive detection of mercury ions in aqueous media’ by Jinjin Yin et al., RSC Adv., 2019, 9, 18728–18733, DOI: 10.1039/C9RA03041G.

Study on the Preparation of PAMAS/PEO Fibrous Membranes by Electrospinning

2016 ◽  
Vol 852 ◽  
pp. 1039-1045
Author(s):  
Hai Jun Zhou ◽  
Ting Ting Zhang ◽  
Yu Zhang ◽  
Jiao Xia Zhang ◽  
Wei Jie Guo
Keyword(s):  
Molecular Weight ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Sulfonic Acid ◽  
Oxidative Polymerization ◽  
Average Diameter ◽  
Vis Spectroscopy ◽  
Fibrous Morphology ◽  
Fibrous Membranes ◽  
Poly Aniline

Poly (aniline-co-2-methoxy aniline-5-sulfonic acid) (PAMAS) was synthesized by an oxidative polymerization in this paper. The resulted copolymer was characterized by Fourier transform infrared spectroscopy and UV-vis spectroscopy, respectively. The PAMAS fibrous membranes and PAMAS/PEO fibrous membranes were prepared via electrospinning. The influence of the molecular weight of PEO and the ratio of PAMAS/PEO in spinning solution on the fibrous morphology was studied. The results showed that PAMAS has fiber-forming ability separately. The addition of PEO was helpful to the the electrospinning of PAMAS. With the increasing of PEO’s molecular weight, the average diameter of the PAMAS/PEO fibers increased. With the increasing of PAMAS content, the fibrous average diameter has an increasing tendency.

scholarly journals Highly stable noble metal nanoparticles dispersible in biocompatible solvents: synthesis of cationic phosphonium gold nanoparticles in water and DMSO

2016 ◽  
Vol 186 ◽  
pp. 77-93 ◽  
Author(s):  
Yon Ju-Nam ◽  
Wanisa Abdussalam-Mohammed ◽  
Jesus J. Ojeda
Keyword(s):  
Gold Nanoparticles ◽  
Drug Carrier ◽  
Aqueous Media ◽  
Noble Metal Nanoparticles ◽  
Great Opportunity ◽  
Thiolate Ligands ◽  
New Family ◽  
Uv Visible ◽  
Potential Use

In this work, we report the synthesis of novel cationic phosphonium gold nanoparticles dispersible in water and dimethyl sulfoxide (DMSO) for their potential use in biomedical applications. All the cationic-functionalising ligands currently reported in the literature are ammonium-based species. Here, the synthesis and characterisation of an alternative system, based on phosphonioalkylthiosulfate zwitterions and phosphonioalkylthioacetate were carried out. We have also demonstrated that our phosphonioalkylthiosulfate zwitterions readily disproportionate into phosphonioalkylthiolates in situ during the synthesis of gold nanoparticles produced by the borohydride reduction of gold(iii) salts. The synthesis of the cationic gold nanoparticles using these phosphonium ligands was carried out in water and DMSO. UV-visible spectroscopic and TEM studies have shown that the phosphonioalkylthiolates bind to the surface of gold nanoparticles which are typically around 10 nm in diameter. The resulting cationic-functionalised gold nanoparticles are dispersible in aqueous media and in DMSO, which is the only organic solvent approved by the U.S. Food and Drug Administration (FDA) for drug carrier tests. This indicates their potential future use in biological applications. This work shows the synthesis of a new family of phosphonium-based ligands, which behave as cationic masked thiolate ligands in the functionalisation of gold nanoparticles. These highly stable colloidal cationic phosphonium gold nanoparticles dispersed in water and DMSO can offer a great opportunity for the design of novel biorecognition and drug delivery systems.

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