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 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.

Applications of Ionic Liquids in Green Catalysis: A Review of Recent Efforts

2021 ◽  
Vol 10 ◽  
Author(s):  
Abhra Sarkar ◽  
Siddharth Pandey
Keyword(s):  
Ionic Liquids ◽  
Environmentally Benign ◽  
Successful Implementation ◽  
Enzymatic Reactions ◽  
Chemical Transformations ◽  
Benign Solvents ◽  
Metallic Compounds ◽  
Green Catalysis ◽  
Reduction Of Co2

: Ionic Liquids (ILs) in their neoteric form have emerged to be a potential ‘green’ alternative of traditional Volatile Organic Compounds (VOCs) as solvents in different fields of industries and academia. Recent investigations on the development of multi-faceted applications of ionic liquids have revealed that they really stand for “environmentally-benign” solvents as far as their impact on the ecology is concerned. This caused them to be an exciting and lucrative subject to explore more and more, and many research groups are involved in the manifestation of their inherent undisclosed legacy. Recently, there has been a huge jump in search of an alternative to conventional metal catalysts in academia as well as in industries due to their pollution-evoking roles. Scientists have explored multiple numbers of homogeneous or heterogeneous mixtures of catalysts incorporating ionic liquids to reduce the extent of contamination in our global environment produced due to catalytic synthesis and chemical transformations. In this review, we have put our concentration on some beneficial and recently explored aspects of the successful implementation of Ionic Liquids in different forms in several fields of catalysis as a ‘green’ alternative catalyst/co-catalyst/solvent for catalysis to replace or minimize the lone and hazardous use of metal and metallic compounds as catalysts as well as chemicals like mineral acids or VOCs as solvents. Here, our study focuses on the inevitable role of ILs in several catalytic reactions like cycloaddition of CO2, electrolytic reduction of CO2, biocatalytic or enzymatic reactions, some of the important organic conversions, and biomass to biofuel conversion as catalysts, cocatalysts, catalyst activator, and solvents.

A New and Convenient Chiral Auxiliary for Asymmetric Diels-Alder Cycloadditions in Environmentally Benign Solvents

Synlett ◽  
2002 ◽  
Vol 2002 (04) ◽  
pp. 0643-0645 ◽  
Author(s):  
Frederick J. Lakner ◽  
George R. Negrete
Keyword(s):  
Diels Alder ◽  
Chiral Auxiliary ◽  
Environmentally Benign ◽  
Benign Solvents

scholarly journals Highly Stable RNA Capture by Dense Cationic Polymer Brushes for the Design of Cytocompatible, Serum-Stable SiRNA Delivery Vectors

2018 ◽  
Vol 19 (2) ◽  
pp. 606-615 ◽  
Author(s):  
Danyang Li ◽  
Amir S. Sharili ◽  
John Connelly ◽  
Julien E. Gautrot
Keyword(s):  
Polymer Brushes ◽  
Sirna Delivery ◽  
Cationic Polymer

Controlled growth of poly (2-(diethylamino)ethyl methacrylate) brushes via atom transfer radical polymerisation on planar silicon surfaces

2006 ◽  
Vol 55 (7) ◽  
pp. 808-815 ◽  
Author(s):  
Paul D Topham ◽  
Jonathan R Howse ◽  
Colin J Crook ◽  
Andrew J Parnell ◽  
Mark Geoghegan ◽  
...  
Keyword(s):  
Silicon Surfaces ◽  
Controlled Growth ◽  
Atom Transfer ◽  
Ethyl Methacrylate ◽  
Radical Polymerisation ◽  
Planar Silicon

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 Foundry-compatible high-resolution patterning of vertically phase-separated semiconducting films for ultraflexible organic electronics

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Binghao Wang ◽  
Wei Huang ◽  
Sunghoon Lee ◽  
Lizhen Huang ◽  
Zhi Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Resolution ◽  
Thin Film Transistors ◽  
Semiconducting Polymers ◽  
Environmentally Benign ◽  
Device Performance ◽  
Solvent Exposure ◽  
Semiconducting Polymer ◽  
Polymer Semiconductors ◽  
Benign Solvents

AbstractSolution processability of polymer semiconductors becomes an unfavorable factor during the fabrication of pixelated films since the underlying layer is vulnerable to subsequent solvent exposure. A foundry-compatible patterning process must meet requirements including high-throughput and high-resolution patternability, broad generality, ambient processability, environmentally benign solvents, and, minimal device performance degradation. However, known methodologies can only meet very few of these requirements. Here, a facile photolithographic approach is demonstrated for foundry-compatible high-resolution patterning of known p- and n-type semiconducting polymers. This process involves crosslinking a vertically phase-separated blend of the semiconducting polymer and a UV photocurable additive, and enables ambient processable photopatterning at resolutions as high as 0.5 μm in only three steps with environmentally benign solvents. The patterned semiconducting films can be integrated into thin-film transistors having excellent transport characteristics, low off-currents, and high thermal (up to 175 °C) and chemical (24 h immersion in chloroform) stability. Moreover, these patterned organic structures can also be integrated on 1.5 μm-thick parylene substrates to yield highly flexible (1 mm radius) and mechanically robust (5,000 bending cycles) thin-film transistors.

Simultaneous Preparation of Multiple Polymer Brushes under Ambient Conditions using Microliter Volumes

2018 ◽  
Vol 130 (41) ◽  
pp. 13621-13626 ◽  
Author(s):  
Benjaporn Narupai ◽  
Zachariah A. Page ◽  
Nicolas J. Treat ◽  
Alaina J. McGrath ◽  
Christian W. Pester ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Ambient Conditions
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