Polymers Based on Cyclic Carbonates as Trait d'Union Between Polymer Chemistry and Sustainable CO2 Utilization

ChemSusChem ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 724-754 ◽  
Author(s):  
Neha Yadav ◽  
Farzad Seidi ◽  
Daniel Crespy ◽  
Valerio D'Elia
Keyword(s):  
Polymer Chemistry ◽  
Cyclic Carbonates ◽  
Co2 Utilization

Tailored Covalent Organic Frameworks for Simultaneously Capturing and Converting CO2 into Cyclic Carbonates

2021 ◽  
Author(s):  
Rongchang Luo ◽  
Yiying Yang ◽  
Kechi Chen ◽  
Xiangying Liu ◽  
Min Chen ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
Cyclic Carbonates ◽  
Co2 Utilization

Catalytic cycloaddition of CO2 to epoxide is one of the most promising and green pathways for CO2 utilization in industry. In recent years, covalent organic frameworks (COFs) as a flourishing...

A multifunctional triazine-based nanoporous polymer as a versatile organocatalyst for CO2 utilization and C–C bond formation

2019 ◽  
Vol 55 (77) ◽  
pp. 11607-11610 ◽  
Author(s):  
Ruchi Sharma ◽  
Ankushi Bansal ◽  
C. N. Ramachandran ◽  
Paritosh Mohanty
Keyword(s):  
Bond Formation ◽  
Cyclic Carbonates ◽  
Co2 Utilization ◽  
Metal Free

Conversion of CO2 to cyclic carbonates, methanol and methane by using a nanoporous MNENP as a multifunctional metal-free organocatalyst.

scholarly journals Tandem Reactions Based on the Cyclization of Carbon Dioxide and Propargylic Alcohols: Derivative Applications of α-Alkylidene Carbonates

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 73
Author(s):  
Bowen Jiang ◽  
Xiangyu Yan ◽  
Yong Xu ◽  
Natalya Likhanova ◽  
Heriberto Díaz Velázquez ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Sustainable Chemistry ◽  
Tandem Reactions ◽  
Cyclic Carbonates ◽  
Co2 Utilization ◽  
Propargylic Alcohols ◽  
The Past ◽  
Energy Environment ◽  
Potential Methods ◽  
Carbon Dioxide Co2

As a well-known greenhouse gas, carbon dioxide (CO2) has attracted increasing levels of attention in areas of energy, environment, climate, etc. Notably, CO2 is an abundant, nonflammable, and renewable C1 feedstock in view of chemistry. Therefore, the transformation of CO2 into organic compounds is an extremely attractive research topic in modern green and sustainable chemistry. Among the numerous CO2 utilization methods, carboxylative cycloaddition of CO2 into propargylic alcohols is an ideal route due to the corresponding products, α-alkylidene cyclic carbonates, which are a series of highly functionalized compounds that supply numerous potential methods for the construction of various synthetically and biologically valuable agents. This cyclization reaction has been intensively studied and systematically summarized, in the past years. Therefore, attention has been gradually transferred to produce more derivative compounds. Herein, the tandem reactions of this cyclization with hydration, amination, alcoholysis, and isomerization to synthesize α-hydroxyl ketones, oxazolidinones, carbamates, unsymmetrical carbonates, tetronic acids, ethylene carbonates, etc. were systematically reviewed.

Anisotropic Membranes as Substrates for Sem

1976 ◽  
Vol 34 ◽  
pp. 444-445
Author(s):  
Thomas P. Turnbull ◽  
W. F. Bowers
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Flow ◽  
Polymer Chemistry ◽  
Surface Porosity ◽  
Transmission Electron ◽  
Pore Texture ◽  
Spongy Layer ◽  
Scanning Electron

Until recently the prime purposes of filters have been to produce clear filtrates or to collect particles from solution and then remove the filter medium and examine the particles by transmission electron microscopy. These filters have not had the best characteristics for scanning electron microscopy due to the size of the pores or the surface topography. Advances in polymer chemistry and membrane technology resulted in membranes whose characteristics make them versatile substrates for many scanning electron microscope applications. These polysulphone type membranes are anisotropic, consisting of a very thin (0.1 to 1.5 μm) dense skin of extremely fine, controlled pore texture upon a much thicker (50 to 250μm), spongy layer of the same polymer. Apparent pore diameters can be controlled in the range of 10 to 40 A. The high flow ultrafilters which we are describing have a surface porosity in the range of 15 to 25 angstrom units (0.0015-0.0025μm).

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