Article
Chemistry, Multidisciplinary
Thi-Hai-Yen Quach, Xavier Allonas, Celine Croutxe-Barghorn, Didier Le Nouen, Marco Sangermano
Summary: The study investigates the photoinduced hydrosilylation reaction using benzophenone as a photoinitiator. The reactivity of different hydrosilanes towards addition onto the double bond is found to depend on their structure. Various spectroscopic techniques were used to determine the reaction products, and it was observed that the substitution of the Si-H bond by phenyl groups can enhance the reaction yield.
Article
Biochemistry & Molecular Biology
Dennis Woitassek, Till Strothmann, Harry Biller, Swantje Lerch, Henning Schmitz, Yefan Song, Stefan Roitsch, Thomas Strassner, Christoph Janiak
Summary: Tunable aryl alkyl ionic liquids (TAAILs) with bis(trifluoromethylsulfonyl)imide anion, combined with or without ethylene glycol (EG), were used for rapid microwave synthesis of platinum nanoparticles (Pt-NPs). TAAILs enable the synthesis of small NPs and are efficient solvents for microwave absorption. The Pt-NPs obtained in TAAILs showed excellent electrocatalytic activity in the hydrogen evolution reaction (HER) and achieved quantitative conversion in the hydrosilylation reaction.
Article
Chemistry, Multidisciplinary
Thomas Hoellerhage, Ambre Carpentier, Thomas P. Spaniol, Laurent Maron, Ulli Englert, Jun Okuda
Summary: Two different multinuclear metal hydrides were isolated in this study, and it was found that there is hydride ligand exchange between calcium and strontium centers, with a higher affinity of the hydride ligand toward calcium.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zhanjie Li, Andrew R. Millward, Souvagya Biswas, Paulami Majumdar, Sukrit Mukhopadhyay, Jeremy Beebe, Ming-Shin Tzou, Paul Hutchins, Lisa Thackery, Richard S. Harner, James A. Kaduk, Britt Vanchura, Ronald Tecklenburg, Dave Ewoldt
Summary: By investigating the mechanism of the reaction and studying the role of different additives, we have discovered new methods to significantly improve the conversion and reaction rate of hydrosilylation reactions.
Article
Chemistry, Physical
Irina K. Goncharova, Roman A. Novikov, Irina P. Beletskaya, Ashot V. Arzumanyan
Summary: This study presents a highly efficient and simple recyclable catalytic system for heterophase hydrosilylation. The catalytic system consists of a commercially available platinum precatalyst, K2PtCl4, and a cheap green solvent, ethylene glycol (EG). The single-atom Pt0-complex generated in the catalytic system enables 36 recycles with quantitative yield in air at room temperature. The method is applicable to a wide range of unsaturated compounds and suitable for the synthesis of linear and cross-linked polyorganosiloxanes.
JOURNAL OF CATALYSIS
(2023)
Article
Energy & Fuels
Tongyan Ren, Guotong Du, Qiyu Li, Yuechuan Wang, Xiaowei Fu, Weibo Kong, Liang Jiang, Jingxin Lei, Ping He, Yao Xiao
Summary: A nanoarray-modified nickel foam was fabricated as a supporting material for polyethylene glycol (PEG) to prepare a form-stable phase change material (PCM). The nanoarrays on the nickel foam acted as nucleating agents, resulting in heterogeneous nucleation of the material. The resulting nanoarray-modified nickel foam-supported PCM (NAPCM) exhibited high latent heat values, thermal conductivity, and potential for thermal energy utilization.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Arthur Stricher, Renaud G. Rinaldi, Laurent Chazeau, Francois Ganachaud
Summary: This communication challenges the previously proposed reaction pathways for photopatterning of PDMS via benzophenone photo-inhibition, and proposes a new mechanism based on nuclear magnetic resonance and size exclusion chromatography. A simplified procedure involving aromatic solvent is finally disclosed.
Article
Chemistry, Physical
Uddhav Kanbur, Ryan J. Witzke, Jiayi Xu, Magali S. Ferrandon, Timothy A. Goetjen, A. Jeremy Kropf, Frederic A. Perras, Cong Liu, T. Don Tilley, David M. Kaphan, Massimiliano Delferro
Summary: A series of electrophilic organoruthenium complexes were synthesized and applied to selective hydrosilylation of olefins. Material 4 showed good catalytic activity and selectivity, and could be recycled multiple times without significant loss of activity.
Article
Polymer Science
Xinyi Shen, Dan Luo, Na Li, Sha Wu, Jingxin Lei, Yuechuan Wang, Yao Xiao, Ping He
Summary: This paper addresses the leakage and supercooling issues of polyethylene glycol (PEG) by using zinc polyacrylate as a supporting material to prepare form-stable phase change materials (FSPCMs) based on PEG. The crosslinked polyacrylate fractions of zinc polyacrylate are bonded by zinc ions. The strong intermolecular force between PEG molecules and the crosslinked polyacrylate fractions stabilizes the shape of the PCMs even at high temperatures. The incompatibility between the PEG matrix and zinc ions leads to the formation of nanostructures, which act as nucleating agents and mitigate the supercooling of the FSPCMs. The FSPCMs exhibit enthalpy change values above 120.0 J g(-1) during the phase transition processes, demonstrating good thermal energy storage capacity. Furthermore, the FSPCMs maintain similar thermal properties to the original ones even after 100 thermal cycles, indicating the stable interaction between the nanostructured zinc polyacrylate and the PEG matrix.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Applied
Sofia S. Filippova, Konstantin V. Deriabin, Ekaterina A. Golovenko, Sergey V. Baykov, Nikita S. Antonov, Vadim P. Boyarskiy, Regina M. Islamova
Summary: This study proposes the use of a platinum-based complex to catalyze the hydrosilylation and dehydrocoupling reactions of high molecular weight polysiloxanes. The complex exhibits good thermal stability at elevated temperatures and allows for cross-linking of the polysiloxanes. The coupling patterns were successfully confirmed using NMR spectroscopy.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Yang Chen, Zhihui Qu, Hui Hu, Yuanhong Gao
Summary: This research proposed a series of nonaqueous phase change solvents for CO2 capture, including amino-phenolic dual-functionalized ILs and PEGs, which showed good capture and regenerability performance, and could reduce the regeneration heat load.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Chaohua Li, Shengpei Su, Bikui Wang, Jijia Zhou
Summary: By incorporating cyano-modification platinum catalyst and urethane-containing polymer into OLSR coating, the study effectively improved its bond strength and storage stability, demonstrating great potential for fabricating OLSR coatings with excellent long-term stable service performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Energy & Fuels
Boanerges Elias Bamaca Saquic, Sibel Irmak, Mark Wilkins, Thomas Smith
Summary: The study evaluated different platinum precursors for developing graphene-supported catalysts for hydrothermal gasification of biomass compounds, finding that ultrasound-assisted preparation method achieved targeted metal loading and better dispersion. PtCl2 precursor was identified as the best for depositing platinum particles on graphene with small, uniform size and narrow dispersion, resulting in similar hydrogen production among different precursors using the ultrasound-assisted method.
Article
Chemistry, Multidisciplinary
Yan Yan, Jiayun Li, Ying Bai, Jiajian Peng
Summary: A series of polyethylene glycol phosphine ligands with N donor were synthesized and coordinated with Co(BF4)2 to catalyze the hydrosilylation of olefins and silanes. The best catalytic effect was achieved when the amount of catalyst was 0.5 mol% and the temperature was 90 degrees C with a reaction time of 5 hours. The catalytic cycle performance was also studied, and it was found that after 8 times, its yield could still reach> 90%.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Ahlem Meziadi, Navid Zuberi, Hendrick W. de Haan, Marc A. Gauthier
Summary: This study reveals that the inefficiency of bioconjugation reactions, such as protein PEGylation, is caused by the excluded volume effect (EVE) between methoxy poly(ethylene glycol) (mPEG) and proteins. The researchers found that this EVE leads to the self-assembly of proteins and reactive mPEG into separate protein-rich and mPEG-rich domains. By adding unreactive low-molecular weight mPEG as a co-solvent, the association between the larger protein and reactive mPEG can be promoted, resulting in improved reaction efficiency.