Article
Multidisciplinary Sciences
Jui-Teng Lin, Jacques Lalevee, Da-Chuan Cheng
Summary: This study investigates the kinetics and conversion features of two 3-component systems based on new kinetic schemes, revealing that co-addition of [B] and N can enhance both free radical polymerization and cationic polymerization, leading to the initiation of interpenetrated polymer networks.
Article
Chemistry, Applied
Gulsana Sissengaliyeva, Fabrice Denes, Vladilena Girbu, Veaceslav Kulcitki, Elena Hofstetter, Philippe Renaud
Summary: The direct hydroperfluoroalkylation of unactivated alkenes using iodoperfluoroalkanes and 4-tert-butylcatechol as a hydrogen source has been achieved at room temperature. Hydrotrifluoromethylation can also be achieved using gaseous trifluoromethyl iodide. Additionally, a simple two-step, one-pot hydrotrifluoromethylation process using trifluoromethanesulfonyl chloride as a trifluoromethyl radical source has been developed.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Polymer Science
Antonela Gallastegui, Maria Emilia Zambroni, Carlos A. Chesta, Rodrigo E. Palacios, Maria Lorena Gomez
Summary: The research focused on developing novel water-soluble eco-friendly hybrid photoinitiator systems, which showed higher polymerization rates and versatility in photopolymerization applications.
Article
Radiology, Nuclear Medicine & Medical Imaging
Vincent Favaudon, Rudi Labarbe, Charles L. Limoli
Summary: Standard radiotherapy facilities deliver doses at a rate of 0.1-0.4 Gy/s, while FLASH radiotherapy requires ultrahigh dose rates in microseconds. The FLASH effect is hypothesized to be dependent on oxygen tension, prompting various theoretical models.
Article
Chemistry, Multidisciplinary
Christine Elian, Benjamin Mourot, Camil Benbouziyane, Jean-Pierre Malval, Sonia Lajnef, Fabienne Peyrot, Florian Massuyeau, Olivier Siri, Denis Jacquemin, Simon Pascal, Davy-Louis Versace
Summary: In this study, a near-infrared-absorbing heptamethine compound incorporating bulky benzo[cd]indole heterocycles was designed to prevent self-aggregation of the dye. Compared to a reference system, the incorporation of the heterocycles resulted in a significantly enhanced photoinitiating reactivity. The researchers achieved a 100% conversion of acrylates C=C bonds even under air conditions by incorporating the near-infrared sensitizer into a three-component system, which allowed for self-regeneration of the photoredox cycle. This cycle was thoroughly investigated by identifying the intermediates using EPR spectroscopy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Caroline J. Aschendorf, Mawuli Degbevi, Keaton V. Prather, Emily Y. Tsui
Summary: The participation of the surfaces of colloidal semiconductor nanocrystal quantum dots in QD-mediated photocatalytic reactions is crucial and should be considered in the design of photocatalysis. The study explores the reactivity of surface sulfides and selenides of metal chalcogenide QDs and demonstrates the importance of QD surfaces beyond tuning their band gaps.
Article
Engineering, Environmental
Yanan Ma, Zhaoyang Wang, Wenyu Yang, Chunyang Chen, Junfeng Li, Ruining He, Shenglin Liu
Summary: In this paper, the degradation of ciprofloxacin using the UV/PDS system was investigated. The study examined the effects of initial pH, PDS dosage, UV light power, CIP concentration, and coexisting substances on the degradation process. The results showed that the UV/PDS system achieved a high degradation efficiency for ciprofloxacin and could potentially degrade other refractory pollutants as well.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Chenglong Yu, Yuxi Lu, Yanting Zhang, Ao Qian, Peng Zhang, Man Tong, Songhu Yuan
Summary: This study investigated the production of hydroxyl radicals (.OH) from solid humic acid during oxidation. The results demonstrated that solid humic acid transferred electrons to oxygen, leading to the generation of .OH. The modeling results also confirmed that reduced solid organic matter played a significant role in .OH production.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yao Zhu, Siyuan Fang, Shaoqin Chen, Youjie Tong, Chunling Wang, Yun Hang Hu
Summary: The study focuses on photocatalytic ethane conversion into CH3CH2OOH using a highly efficient visible-light-responsive photocatalyst, Au/WO3. The introduction of thermal energy significantly increased the production yield, and the reaction pathway was revealed through trapping active species and isotope-labeling reactants.
Review
Polymer Science
Frederic Dumur
Summary: In recent years, research efforts have focused on multicomponent photoinitiating systems, especially for the design of visible light photoinitiating systems. Monocomponent Type II photoinitiators have been designed to simplify the elaboration of photocurable resins. Sulfonium salts, as remarkable photoinitiators, lack absorption in the visible range, leading to various structural modifications for redshifting their absorptions. This work provides an overview of different sulfonium salts activable under visible light.
Article
Polymer Science
Yang Li, Usman Shaukat, Sandra Schlogl, Tanlong Xue, Jingfang Li, Jun Nie, Xiaoqun Zhu
Summary: Driven by the demand for low cost and environmentally friendly curing processes, the research on synthesis of visible light absorbing photoinitiators has been significant in the field of photo-polymerization. In this study, a novel synthesis route is introduced to obtain a bifunctional pyrrole-carbazole-based photoinitiator (ECMO), which can initiate free radical polymerization upon visible light exposure. ECMO also acts as a sensitizer for triar-ysulfonium salts, extending their absorption window into the visible light region and showing superior curing performance in cationic polymerization.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Energy & Fuels
Zhilin Xi, Mengmeng Li, Xue Li, Linping Lu, Jiawei Wang
Summary: This study investigates the reaction mechanisms involving hydroxyl radicals in coal and the inhibitory effect of hydroxytyrosol on coal spontaneous combustion. The results suggest that hydroxyl radicals are primarily formed through the decomposition of peroxyl radicals, and then they participate in the oxidation reactions of hydrocarbons and oxygen-containing groups in coal. Hydroxytyrosol effectively removes free radicals from coal and inhibits coal spontaneous combustion.
Article
Polymer Science
Ning Li, Xiang-Cheng Pan
Summary: This article introduces a new method - oxygen initiation, which can directly transform molecular oxygen into the initiating carbon radical in CRP, improving oxygen tolerance. RAFT polymerization initiated by oxygen allows for control of the polymerization spatiotemporally under ambient conditions, leading to the synthesis of ultra-high molecular weight polymers.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Zuxiao Zhang, Duong T. Ngo, David A. Nagib
Summary: A dual catalytic strategy involving an Ir photocatalyst and a Cu complex enables regioselective amination and cross-coupling of allyl alcohols with various nucleophiles. This approach allows for the formation of N-radicals via an energy transfer mechanism followed by interception of alkyl radicals for radical amino-functionalizations of olefins. Insights into the nature of Cu-based radical interception are provided through stereo, regio, and kinetic probes.
Article
Chemistry, Applied
Weijie Wang, Ming Jin, Haiyan Pan, Decheng Wan
Summary: Visible light-sensitive photoinitiators were designed and synthesized for LED photopolymerization. The substituents on the para-position of the phenyl ring significantly influenced the absorption and initiation activities of the oxime esters. Results suggested that the photoreactions were mainly from the triplet states, making them suitable PIs for LED polymerization.
Article
Chemistry, Multidisciplinary
Guillaume Povie, Leigh Ford, Davide Pozzi, Valentin Soulard, Giorgio Villa, Philippe Renaud
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2016)
Article
Multidisciplinary Sciences
Guillaume Povie, Yasutomo Segawa, Taishi Nishihara, Yuhei Miyauchi, Kenichiro Itami
Article
Chemistry, Multidisciplinary
Guillaume Povie, Yasutomo Segawa, Taishi Nishihara, Yuhei Miyauchi, Kenichiro Itami
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Multidisciplinary Sciences
Guillaume Povie, Sankar Rao Suravarapu, Martin Peter Bircher, Melinda Meyer Mojzes, Samuel Rieder, Philippe Renaud
Article
Chemistry, Multidisciplinary
Guillaume Povie, Anh-Tuan Tran, David Bonnaffe, Jacqueline Habegger, Zhaoyu Hu, Christine Le Narvor, Philippe Renaud
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2014)
Article
Chemistry, Multidisciplinary
Guillaume Povie, Giorgio Villa, Leigh Ford, Davide Pozzi, Carl H. Schiesser, Philippe Renaud
CHEMICAL COMMUNICATIONS
(2010)
Review
Chemistry, Multidisciplinary
Fabrice Denes, Mark Pichowicz, Guillaume Povie, Philippe Renaud
Article
Chemistry, Multidisciplinary
Guillaume Povie, Philippe Renaud
Article
Chemistry, Organic
Guillaume Povie, Mattia Marzorati, Peter Bigler, Philippe Renaud
JOURNAL OF ORGANIC CHEMISTRY
(2013)
Article
Chemistry, Multidisciplinary
Giorgio Villa, Guillaume Povie, Philippe Renaud
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2011)
Article
Chemistry, Organic
Ioulia Gorokhovik, Samuel Rieder, Guillaume Povie, Philippe Renaud
