Fluorescence studies in environmentally benign solvents: solvation dynamics of Coumarin 102 in [BMIM][BF4]

2005 ◽  
Vol 31 (7-8) ◽  
pp. 575-583 ◽  
Author(s):  
Prasun Kumar Mandal ◽  
Aniruddha Paul ◽  
Anunay Samanta
Keyword(s):  
Environmentally Benign ◽  
Solvation Dynamics ◽  
Fluorescence Studies ◽  
Benign Solvents ◽  
Coumarin 102

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.

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 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.

scholarly journals Bio-Reductive Synthesis and Characterization of Plant Protein Coated Magnetite Nanoparticles

Nano Hybrids ◽  
2014 ◽  
Vol 7 ◽  
pp. 69-86 ◽  
Author(s):  
Amlan Kumar Das ◽  
Avinash Marwal ◽  
Ruchi Verma
Keyword(s):  
Plant Protein ◽  
Environmentally Benign ◽  
Renewable Materials ◽  
Synthetic Strategy ◽  
Benign Solvents ◽  
Key Issues ◽  
Ft Ir ◽  
Datura Inoxia ◽  
Ft Ir Spectroscopy

Over the past two decades, there have been increased emphases on the topic of green chemistry and chemical processes. Utilization of non toxic chemicals, environmentally benign solvents, and renewable materials are some of the key issues that merit important consideration in a green synthetic strategy. The Datura Inoxia leaves possesses biomolecules such as cardiac glycosides, proteins, phenolic compounds, flavonoids and sugar, which could be used as reducing agent to react with ferrous and ferric ions and as scaffolds to direct the formation of Fe3O4 NPs in solution. To the best of our knowledge, the use of Dhatura innoxia plant extract at room temperature for the bio-reductive synthesis of Fe3O4 nanoparticles has not been reported. The formation of the Fe3O4 magnetic nanoparticles was first monitored using UV-Vis absorption spectroscopy. FT-IR spectroscopy and TGA/DTG analysis further confirms the formation of plant protein coated magnetite nanobio hybrid. The dried form of synthesized nanoparticles was further characterized using XRD, TEM.

Applications of Micelles in Catalyzing Organic Reactions

2020 ◽  
Vol 17 (3) ◽  
pp. 289-296
Author(s):  
Bilal A. Bhat ◽  
Bashir A. Shairgojray
Keyword(s):  
Chemical Reactions ◽  
Bond Formation ◽  
Coupling Reaction ◽  
Organic Reactions ◽  
Environmentally Benign ◽  
Metathesis Reaction ◽  
Environmental Friendly ◽  
Carbon Carbon Bond ◽  
Benign Solvents ◽  
Alternative Approaches

: Micellar chemistry is gaining considerable interest among organic chemists because these reactions are carried out in environmentally benign solvents like water. Owing to the exhaustive use of toxic solvents in carrying out the different chemical reactions, there is a pressing need for alternative approaches either environmental friendly or having minimum impact on the environment. In this article, we aim to discuss the various aspects of micellar chemistry viz-a-viz its role in guiding the chemical reactions. Micelles help to drive various kinds of organic reactions including oxidations, reductions, carbon-carbon bond formation, carbon-heteroatom bond formation, multi-component reactions, Pd-coupling reaction, olefin metathesis reaction, Morita-Baylis-Hillman reaction, etc. in water.

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