Results 21 to 30 of about 39,317 (310)

Ring-opening polymerization

Chemistry Teacher International, 2021
Ring-opening polymerization is defined by IUPAC (Penczek, S., Moad, G. (2008). Glossary of the terms related to kinetics, thermodynamics, and mechanisms of polymerization.
Penczek Stanislaw, Pretula Julia, Slomkowski Stanislaw   +2 more
doaj   +1 more source

Electrochemical Oxidation of Catechol in the Presence of some Azacrown Ethers and Transition Metal Ions in Acetonitrile

International Journal of Electrochemical Science, 2009
The electrochemical oxidation of catechol (H2Q) (1) has been studied in the absence and presence of 1,10.diaza-18-crown-6 (DA18C6) (2a), 1,7-diaza-15-crown-5 (DA15C5) (2b) and aza-15-crown-5 (A15C5) (2c) and also, in the presence of some transition metal
Davood Nematollahi, Leila Mohammadi-Behzad   +1 more
doaj   +1 more source

The Thermal degradation of Bisphenol A Polycarbonate in Air [PDF]

, 2005
The thermal degradation of polycarbonate in air was studied as a function of mass loss using TGA/FTIR, GC/MS and LC/MS. In the main degradation region, 480–560 °C, the assigned structures of smaller molecules and linear molecules that evolved in air were
Jang, Bok Nam, Wilkie, Charles A.
core   +2 more sources

The hydrolysis of geminal ethers: a kinetic appraisal of orthoesters and ketals

Beilstein Journal of Organic Chemistry, 2016
A novel approach to protecting jet fuel against the effects of water contamination is predicated upon the coupling of the rapid hydrolysis reactions of lipophilic cyclic geminal ethers, with the concomitant production of a hydrophilic acyclic ...
Sonia L. Repetto, James F. Costello, Craig P. Butts, Joseph K. W. Lam, Norman M. Ratcliffe   +4 more
doaj   +1 more source

Addition to Electron Deficient Olefins of α-Oxy Carbon- Centered Radicals, Generated from Cyclic Ethers and Acetals by the Reaction with Alkylperoxy- λ3-iodane

Molecules, 2005
Thermal decomposition of 1-tert-butylperoxy-1,2-benziodoxol-3(1H)-one in cyclic ethers and acetals at 50 °C generates α-oxy carbon-centered radicals, which undergo an addition reaction with vinyl sulfones and unsaturated esters.
M. Ochiai, T. Suefuji, Y. Takeuchi, T. Sueda   +3 more
doaj   +1 more source

pH-Responsive Hollow Polymeric Microspheres from Irradiated Cyclic Ether Aqueous Solution

Applied Sciences, 2021
Smart hollow polymeric microspheres have been widely applied in various fields such as controlled release, drug delivery, catalysis, and so on. Herein, a facile, green and one-step template-free method is introduced for preparing pH-responsive hollow ...
Chuhong Yu, Jing Peng, Jiuqiang Li, Maolin Zhai   +3 more
doaj   +1 more source

Poly-p-hydroquinone Ethers: Isoenergetic Molecular Wires with Length-Invariant Oxidation Potentials and Cation Radical Excitation Energies [PDF]

, 2017
Typical poly-p-phenylene wires are characterized by strong interchromophoric electronic coupling with redox and optical properties being highly length-dependent.
Chebny, Vincent J., Ivanov, Maxim Vadimovich, Rathore, Rajendra, Talipov, Marat R.   +3 more
core   +5 more sources

Lewis Acid-Initiated Ring-Opening Reactions of Five- and Six-Membered Cyclic Ethers Based on the Oxonium Ylide Intermediates

Organics
In light of the small ring strain of five/six-membered cyclic ethers, constructing complex molecules via ring-opening reactions has consistently been a highly challenging topic in organic synthesis.
Dandan Jiang, Jun Xiao, Yingzhen Zhang, Kunming Liu, Juanhua Li, Jinbiao Liu   +5 more
doaj   +1 more source

Mass spectrometry-based fragmentation as an identification tool in lignomics [PDF]

, 2010
The ensemble of all phenolics for which the biosynthesis is coregulated with lignin biosynthesis, i.e., metabolites from the general phenylpropanoid, monolignol, and (neo)-lignan biosynthetic pathways and their derivatives, as well as the lignin ...
Akiyama, Takuya, Boerjan, Wout, Dima, Oana, Goeminne, Geert, Inzé, Dirk, Kim, Hoon, Lu, Fachuang, Messens, Eric, Morreel, Kris, Niculaes, Claudiu, Ralph, John, Vanholme, Ruben   +11 more
core   +2 more sources

Iminoiodane- and Brønsted Base-Mediated Cross Dehydrogenative Coupling of Cyclic Ethers with 1,3-Dicarbonyl Compounds

Molecules, 2015
A one-pot, two-step approach to prepare 2-tetrahydrofuran and -pyran substituted 1,3-dicarbonyl compounds by PhI=NTs-mediated amination/Brønsted base-catalyzed cross dehydrogenative coupling (CDC) reaction of the cyclic ether and 1,3-dicarbonyl ...
Ciputra Tejo, Xiao Rong Sim, Bo Ra Lee, Benjamin James Ayers, Chung-Hang Leung, Dik-Lung Ma, Philip Wai Hong Chan   +6 more
doaj   +1 more source