scholarly journals Polymeric carbon nitrides and related metal-free materials for energy and environmental applications

2020 ◽  
Vol 8 (22) ◽  
pp. 11075-11116 ◽  
Author(s):  
Jesús Barrio ◽  
Michael Volokh ◽  
Menny Shalom
Keyword(s):  
Catalytic Properties ◽  
Functional Materials ◽  
Environmental Applications ◽  
Facile Synthesis ◽  
Metal Free ◽  
New Class ◽  
Wide Range ◽  
Carbon Nitrides ◽  
Polymeric Carbon

Carbon nitrides have emerged as a new class of functional materials for a wide range of energy and environmental applications due to their chemical, photophysical and catalytic properties as well as their low-price, facile synthesis and stability.

Emerging trends in sensors based on carbon nitride materials

The Analyst ◽  
2019 ◽  
Vol 144 (5) ◽  
pp. 1475-1491 ◽  
Author(s):  
Marilyn Mary Xavier ◽  
P. Radhakrishnan Nair ◽  
Suresh Mathew
Keyword(s):  
Carbon Nitride ◽  
Functional Materials ◽  
New Class ◽  
Emerging Trends ◽  
Carbon Nitrides ◽  
Carbon Nitride Materials

A new class of functional materials, carbon nitrides, has recently attracted the attention of researchers.

A metal-free heterogeneous photocatalyst for the selective oxidative cleavage of CC bonds in aryl olefins via harvesting direct solar energy

2020 ◽  
Vol 22 (14) ◽  
pp. 4516-4522 ◽  
Author(s):  
Yu Zhang ◽  
Nareh Hatami ◽  
Niklas Simon Lange ◽  
Emanuel Ronge ◽  
Waldemar Schilling ◽  
...  
Keyword(s):  
Solar Energy ◽  
Oxidative Cleavage ◽  
Metal Free ◽  
Carbon Nitrides ◽  
Aryl Olefins ◽  
Polymeric Carbon

A mild protocol has been developed using polymeric carbon nitrides (PCN) as metal-free heterogeneous photocatalyst to convert olefins into the corresponding carbonyls which even can be applied in the gram scale synthesis using direct solar energy.

Kinetics of phenylacetylene selective hydrogenation to styrene over metal-free polymeric carbon nitrides

2018 ◽  
Vol 565 ◽  
pp. 13-19 ◽  
Author(s):  
Vagif Akhmedov ◽  
Agadadash Aliyev ◽  
Muxtar Bahmanov ◽  
Vusal Ahmadov ◽  
Dilgam Tagiyev
Keyword(s):  
Selective Hydrogenation ◽  
Metal Free ◽  
Carbon Nitrides ◽  
Polymeric Carbon ◽  
Kinetics Of

scholarly journals Carbon nitrides: synthesis and characterization of a new class of functional materials

2017 ◽  
Vol 19 (24) ◽  
pp. 15613-15638 ◽  
Author(s):  
T. S. Miller ◽  
A. Belen Jorge ◽  
T. M. Suter ◽  
A. Sella ◽  
F. Corà ◽  
...  
Keyword(s):  
Functional Properties ◽  
Functional Materials ◽  
Synthesis And Characterization ◽  
Next Generation ◽  
New Class ◽  
Carbon Nitrides

We examine the characterization of carbon nitrides and provide a perspective on their functional properties as next-generation materials.

Facile Synthesis of Crystalline Polymeric Carbon Nitrides with an Enhanced Photocatalytic Performance under Visible Light

ChemCatChem ◽  
2015 ◽  
Vol 7 (18) ◽  
pp. 2897-2902 ◽  
Author(s):  
Qinghua Liang ◽  
Zheng-Hong Huang ◽  
Feiyu Kang ◽  
Quan-Hong Yang
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Facile Synthesis ◽  
Carbon Nitrides ◽  
Polymeric Carbon

Facile Synthesis of a Diverse Library of Mono-3-substituted β-Cyclodextrin Analogues

2018 ◽  
Author(s):  
Kathryn Kellett ◽  
Brendan M. Duggan ◽  
Michael Gilson
Keyword(s):  
High Yield ◽  
Facile Synthesis ◽  
Wide Range

We have described simple, high-yield, protocols, which require only commonly accessible equipment, to synthesize a wide range of β-CD derivatives mono-substituted at the secondary face. These derivatives may be useful in their own right, and they are also scaffolds for further modification, and examples of the far broader array of derivatives that may be accessed by these procedures.

p-Sulfonic acid calix[n]arene catalyzed synthesis of bioactive heterocycles: A review

2020 ◽  
Vol 24 ◽  
Author(s):  
Bubun Banerjee ◽  
Gurpreet Kaur ◽  
Navdeep Kaur
Keyword(s):  
Supramolecular Chemistry ◽  
Sulfonic Acid ◽  
Catalytic Efficiency ◽  
The Other ◽  
Reaction Conditions ◽  
Metal Free ◽  
Bioactive Scaffolds ◽  
Wide Range ◽  
Efficient Alternative ◽  
Bioactive Heterocycles

: Metal-free organocatalysts are becoming an important tool for the sustainable developments of various bioactive heterocycles. On the other hand, during last two decades, calix[n]arenes have been gaining considerable attention due to their wide range of applicability in the field of supramolecular chemistry. Recently, sulfonic acid functionalized calix[n] arenes are being employed as an efficient alternative catalyst for the synthesis of various bioactive scaffolds. In this review we have summarized the catalytic efficiency of p-sulfonic acid calix[n]arenes for the synthesis of diverse biologically promising scaffolds under various reaction conditions. There is no such review available in the literature showing the catalytic applicability of p-sulfonic acid calix[n]arenes. Therefore, we strongly believe that this review will surely attract those researchers who are interested about this fascinating organocatalyst.

Enzymes as a Reservoir of Host Defence Peptides

2020 ◽  
Vol 20 (14) ◽  
pp. 1310-1323
Author(s):  
Andrea Bosso ◽  
Antimo Di Maro ◽  
Valeria Cafaro ◽  
Alberto Di Donato ◽  
Eugenio Notomista ◽  
...  
Keyword(s):  
Innate Immunity ◽  
Biological Activity ◽  
Internal Structure ◽  
Catalytic Properties ◽  
Cellular Responses ◽  
Host Defence ◽  
Present Review ◽  
Active Peptides ◽  
Wide Range

Host defence peptides (HDPs) are powerful modulators of cellular responses to various types of insults caused by pathogen agents. To date, a wide range of HDPs, from species of different kingdoms including bacteria, plant and animal with extreme diversity in structure and biological activity, have been described. Apart from a limited number of peptides ribosomally synthesized, a large number of promising and multifunctional HDPs have been identified within protein precursors, with properties not necessarily related to innate immunity, consolidating the fascinating hypothesis that proteins have a second or even multiple biological mission in the form of one or more bio-active peptides. Among these precursors, enzymes constitute certainly an interesting group, because most of them are mainly globular and characterized by a fine specific internal structure closely related to their catalytic properties and also because they are yet little considered as potential HDP releasing proteins. In this regard, the main aim of the present review is to describe a panel of HDPs, identified in all canonical classes of enzymes, and to provide a detailed description on hydrolases and their corresponding HDPs, as there seems to exist a striking link between these structurally sophisticated catalysts and their high content in cationic and amphipathic cryptic peptides.

Synthesis of Pyrrolo[1,2-a][1,6]- and [1,8]naphthyridines by Alkyne-Carbonyl Metathesis

Synthesis ◽  
2020 ◽  
Author(s):  
Peter Ehlers ◽  
Peter Langer ◽  
Marian Blanco Ponce ◽  
Silvio Parpart ◽  
Alexander Villinger ◽  
...  
Keyword(s):  
Heterocyclic Compounds ◽  
Metathesis Reaction ◽  
Synthetic Methodology ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
One Pot ◽  
Metal Free ◽  
Modular Synthesis

AbstractA concise and modular synthesis of pyrrolo[1,2-a][1,6]- and [1,8]naphthyridines by a one-pot two-step reaction consisting of electrophilic acylation followed by an alkyne-carbonyl-metathesis reaction as the final cyclization step is reported. This developed synthetic methodology allows the facile synthesis of these heterocyclic core structures in mainly high overall yields under metal-free conditions. Reaction conditions are carefully optimized and display a novel supplement to access these tricyclic heterocyclic compounds.

scholarly journals Characterizing Bacterial Cellulose Produced byKomagataeibacter sucrofermentans H-110 on Molasses Medium and Obtaining a Biocomposite Based on It for the Adsorption of Fluoride

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1422
Author(s):  
Viktor V. Revin ◽  
Alexander V. Dolganov ◽  
Elena V. Liyaskina ◽  
Natalia B. Nazarova ◽  
Anastasia V. Balandina ◽  
...  
Keyword(s):  
Composite Material ◽  
Adsorption Capacity ◽  
Bacterial Cellulose ◽  
Functional Materials ◽  
Degree Of Crystallinity ◽  
Maximum Adsorption Capacity ◽  
Fluoride Ions ◽  
Sorption Ability ◽  
Wide Range ◽  
Biocomposite Material

Currently, there is an increased demand for biodegradable materials in society due to growing environmental problems. Special attention is paid to bacterial cellulose, which, due to its unique properties, has great prospects for obtaining functional materials for a wide range of applications, including adsorbents. In this regard, the aim of this study was to obtain a biocomposite material with adsorption properties in relation to fluoride ions based on bacterial cellulose using a highly productive strain of Komagataeibacter sucrofermentans H-110 on molasses medium. Films of bacterial cellulose were obtained. Their structure and properties were investigated by FTIR spectroscopy, NMR, atomic force microscopy, scanning electron microscopy, and X-ray structural analysis. The results show that the fiber thickness of the bacterial cellulose formed by the K. sucrofermentans H-110 strain on molasses medium was 60–90 nm. The degree of crystallinity of bacterial cellulose formed on the medium was higher than on standard Hestrin and Schramm medium and amounted to 83.02%. A new biocomposite material was obtained based on bacterial cellulose chemically immobilized on its surface using atomic-layer deposition of nanosized aluminum oxide films. The composite material has high sorption ability to remove fluoride ions from an aqueous medium. The maximum adsorption capacity of the composite is 80.1 mg/g (F/composite). The obtained composite material has the highest adsorption capacity of fluoride from water in comparison with other sorbents. The results prove the potential of bacterial cellulose-based biocomposites as highly effective sorbents for fluoride.

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