scholarly journals Iron-catalysed, general and operationally simple formal hydrogenation using Fe(OTf)3 and NaBH4

2014 ◽  
Vol 12 (28) ◽  
pp. 5082-5088 ◽  
Author(s):  
Alistair J. MacNair ◽  
Ming-Ming Tran ◽  
Jennifer E. Nelson ◽  
G. Usherwood Sloan ◽  
Alan Ironmonger ◽  
...  
Keyword(s):  
Environmentally Benign ◽  
Ambient Conditions

An operationally simple and environmentally benign formal hydrogenation protocol has been developed using a highly abundant iron(iii) salt and an inexpensive, bench stable, stoichiometric reductant, NaBH4, in ethanol, under ambient conditions.

scholarly journals Recent advances in the electrochemical construction of heterocycles

2014 ◽  
Vol 10 ◽  
pp. 2858-2873 ◽  
Author(s):  
Robert Francke
Keyword(s):  
Heterocyclic Compounds ◽  
Elevated Temperatures ◽  
Ring Formation ◽  
Environmentally Benign ◽  
Heterocyclic Chemistry ◽  
Ambient Conditions ◽  
Recent Developments ◽  
Strong Acids ◽  
Selection Of ◽  
Made In

Due to the fact that the major portion of pharmaceuticals and agrochemicals contains heterocyclic units and since the overall number of commercially used heterocyclic compounds is steadily growing, heterocyclic chemistry remains in the focus of the synthetic community. Enormous efforts have been made in the last decades in order to render the production of such compounds more selective and efficient. However, most of the conventional methods for the construction of heterocyclic cores still involve the use of strong acids or bases, the operation at elevated temperatures and/or the use of expensive catalysts and reagents. In this regard, electrosynthesis can provide a milder and more environmentally benign alternative. In fact, numerous examples for the electrochemical construction of heterocycles have been reported in recent years. These cases demonstrate that ring formation can be achieved efficiently under ambient conditions without the use of additional reagents. In order to account for the recent developments in this field, a selection of representative reactions is presented and discussed in this review.

scholarly journals Accessible and sustainable Cu(0)-mediated radical polymerisation for the functionalisation of surfaces

2020 ◽  
Vol 11 (23) ◽  
pp. 3831-3840
Author(s):  
Oliver Frank Uttley ◽  
Leonie Alice Brummitt ◽  
Stephen David Worrall ◽  
Steve Edmondson
Keyword(s):  
Polymer Brushes ◽  
Cationic Polymer ◽  
Environmentally Benign ◽  
Controlled Growth ◽  
Ambient Conditions ◽  
Radical Polymerisation ◽  
Benign Solvents ◽  
Surface Functionalisation

Towards use of environmentally benign solvents and ambient conditions for surface functionalisation by controlled growth of thick cationic polymer brushes.

scholarly journals Direct propylene epoxidation with oxygen enabled by photo-electro-heterogeneous catalytic system

2021 ◽  
Author(s):  
Myohwa Ko ◽  
Yongseon Kim ◽  
Jinwoo Woo ◽  
Rashmi Mehrotra ◽  
Pankaj Sharma ◽  
...  
Keyword(s):  
Catalytic System ◽  
Environmentally Benign ◽  
Ambient Conditions ◽  
Propylene Epoxidation ◽  
Epoxidation Of Propylene ◽  
Heterogeneous Catalytic ◽  
External Bias ◽  
Heterogeneous Catalytic System ◽  
Sacrificial Agent

Abstract Propylene oxide (PO) is a crucial feedstock in the plastic industry. The direct epoxidation of propylene using O2 is considered to be the most promising means of producing PO, but it remains challenging. Here, we report on an integrated photo-electro-heterogeneous catalytic system for propylene epoxidation with O2. Bismuth vanadate (or TiO2) photocatalyst and Co-based electrocatalyst produce H2O2 and titanium silicalite-1 heterogeneous catalyst epoxidises propylene to PO with the in situ generated H2O2. This system enables PO production with O2 as the sole oxidising agent under light irradiation without using H2, a sacrificial agent, or external bias. It stably produces PO for 24 h with high selectivity (≥ 98%) under ambient conditions. These results demonstrate the potential of this new catalytic system to produce chemical compounds in an environmentally benign manner.

scholarly journals A Non aqueous Formulation for Efficient Detoxification of Chemical Weapons at Sub zero Temperatures

2020 ◽  
Vol 5 (1) ◽  
pp. 10-17
Author(s):  
G.K. Prasad ◽  
Lokesh K. Pandey ◽  
Virendra V. Singh ◽  
K. Ganesan ◽  
Jyotiranjan Acharya ◽  
...  
Keyword(s):  
Potassium Hydroxide ◽  
Sulfur Mustard ◽  
Field Application ◽  
Environmentally Benign ◽  
Chemical Weapons ◽  
Ambient Conditions ◽  
Vinyl Sulfide ◽  
Wide Range ◽  
New Formulation ◽  
Near Future

An effective decontamination methodology based on nucleophilic non-aqueous decontaminant has been developed against chemical weapons sulfur mustard and soman. This new formulation consists of non-aqueous solution of 2-aminoethanol (60%, w/v), potassium hydroxide (2%, w/v), and N-methyl-2-pyrrolidone (38 %, w/v) and detoxified more than 99 % of sulfur mustard and soman within a period of 30 min at -35 °C. It was found to be operable over a wide range of temperatures starting from -35 °C to +55 °C without losing its fluidity and detoxicant efficiency at sub-zero temperatures promising hassle-free application against chemical weapons. It degrades sulfur mustard to divinyl sulfide and 2-chloroethyl vinyl sulfide and converted soman into O-pinacolyl O’-(2-amino) ethyl methylphosphonate, which are relatively non toxic to humans. This formulation is environmentally benign, relatively non corrosive and has an improved capability to dissolve and decontaminate chemical weapons within 15 minutes at ambient conditions. This approach paves the way for efficient and rapid decontamination platform for chemical weapons and holds considerable promise for field application in near future.

scholarly journals Biomass-Derived Nitrogen-Doped Porous Carbon for Highly Efficient Ambient Electro-Synthesis of NH3

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 353
Author(s):  
Qinglin Li ◽  
Xiufang Chen ◽  
Yong Yang
Keyword(s):  
Porous Carbon ◽  
Cost Effective ◽  
Environmentally Benign ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Nitrogen Doped ◽  
N Source ◽  
Bamboo Shoots ◽  
Hcl Solution

In this communication, we report a biomass-derived nitrogen-doped porous carbon (named as NC-800) as an electrocatalyst for the ambient conversion of N2 to NH3. The catalyst NC-800 was prepared from naturally renewable and easily available bamboo shoots, with inherently an approximate 8 wt % of N-containing components, such as the N source, in a cost-effective and environmentally benign manner. This exhibited remarkable catalytic activity with a large NH3 yield and a Faradaic efficiency as high as 16.3 μg h−mg-1cat and 27.5%, respectively, at −0.35 V versus a reversible hydrogen electrode (RHE) in 0.1 M HCl solution at ambient conditions. More importantly, the catalyst NC-800 demonstrated excellent electrochemical selectivity and stability.

Synthesis of Crystalline ZnO Nanosheets on Graphene and Other Substrates at Ambient Conditions

2012 ◽  
Vol 1449 ◽  
Author(s):  
Phani Kiran Vabbina ◽  
Santanu Das ◽  
Nezih Pala ◽  
Wonbong Choi
Keyword(s):  
Synthesis Method ◽  
Zinc Nitrate ◽  
Environmentally Benign ◽  
Nitrate Hexahydrate ◽  
Ambient Conditions ◽  
X Ray ◽  
Extensive Analysis ◽  
Transmission Electron ◽  
Zno Nanosheets ◽  
Sonochemical Reaction

ABSTRACTWe report on the fabrication of ZnO nanosheets on Graphene and other substrates at ambient conditions. The growth mechanism and the effect of the substrate are also discussed. Our synthesis method is based on sonochemical reaction of Zinc nitrate hexahydrate and hexamethylenetetramine in aqueous solutions. Extensive analysis by transmission electron microscopy, energy dispersive x-ray spectroscopy (EDS) revealed crystalline ZnO composition of the ZnO nanosheets. The proposed method is a rapid, inexpensive, low-temperature, catalystfree, CMOS compatible and environmentally benign alternative to existing growth techniques.

Tunable cathodoluminescence over the entire visible window from all-inorganic perovskite CsPbX3 1D architecture

2018 ◽  
Vol 6 (13) ◽  
pp. 3322-3333 ◽  
Author(s):  
T. Paul ◽  
B. K. Chatterjee ◽  
S. Maiti ◽  
S. Sarkar ◽  
N. Besra ◽  
...  
Keyword(s):  
Solution Phase ◽  
Environmentally Benign ◽  
Phase Method ◽  
Ambient Conditions ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Solution Phase Method ◽  
Lead Halide

By adopting a facile, environmentally benign, solution phase method under ambient conditions, we have successfully synthesized all-inorganic cesium lead halide perovskite 1D rods.

Sign in / Sign up

Export Citation Format

Share Document