MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2020
·Vol. 221
·期 11
·2000071
·
IF 2.335
Xiuxiu Wang,Nan Zhao,Ban Qin,Jiaojiao Xu,Wenlong Yang,Chensha Li,Liguo Sun,Jianqi Zhang
For the first time, an ultrasonics sonochemistry method is developed to promote the one-pot hydrosilylation polyaddition polymerization and crosslinking reaction in the preparation of polysiloxane main-chain liquid-crystalline elastomers (MC-LCEs). Due to the extraordinary effect of acoustic cavitation, the polyaddition polymerization and crosslinking reaction can be successfully carried out in an ordinary laboratory ultrasonic cleaner at room temperature, and generates the LCE matrix network in about 30 min. The prepared MC-LCEs demonstrate good quality, good properties, and stimuli-actuation performances. Compared to the traditional thermal processing methods for preparing polysiloxane MC-LCEs, this method exhibits superior properties rapidly, with high convenience and efficiency, and can be a path for batch fabrication at low cost. The work also demonstrates that the ultrasonics sonochemistry method is effective in generating linear main-chain liquid crystal polymers through hydrosilylation polyaddition and polysiloxane side-chain LCE matrix through hydrosilylation crosslinking reaction, thus confirming the high availability of ultrasonics sonochemistry in the processes of hydrosilylation polymerization, crosslinking reactions, or synchronous polymerization and crosslinking reactions.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2019
·
IF 0.781
Xiaoling Yang,Ying Bai,Jiayun Li,Zinan Dai,Jiajian Peng
A novel iron-catalyzed hydrosilylation of alkenes process under solvent-free conditions has been reported. The influence of the amount of Fe catalyst, reaction temperature and various alkenes and silanes on the hydrosilylation were investigated. High yields of adduct were obtained in the hydrosilylation of octene with MeCl2H, Me2ClSiH and Ph2SiH2 by using 10 mol% iron powder as a signal catalyst.
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DOI
高影响因子
Journal of the American Chemical Society
·
2013
·
IF 10.677
Dongjie Peng,Yanlu Zhang,Xiaoyong Du,Lei Zhang,Xuebing Leng,Marc D. Walter,Zheng Huang
A series of new pincer iron complexes with electron-donating phosphinite-iminopyridine (PNN) ligands has been prepared and characterized. These iron compounds are efficient and selective catalysts for the anti-Markovnikov alkene hydrosilylation of primary, secondary, and tertiary silanes. More importantly, the system exhibits unprecedented functional group tolerance with reactive groups such as ketones, esters, and amides. Furthermore, the iron-catalyzed alkene hydrosilylation was successfully applied to the synthesis of a valuable insecticide, silafluofen. The electronic properties and structures of the iron complexes have been studied by spectroscopies and computational methods. Overall, the iron catalysts may provide a low-cost and environmentally benign alternative to currently employed precious metal systems for alkene hydrosilylation.
研究领域:
有机化学
·
催化化学
·
环境化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 10
·e70648
·
IF 4.3
Weihong Huang,Zhijun Yuan,Ying Bai,Jiayun Li,Jiajian Peng,Guoqiao Lai
The hydrosilylation reaction is the core conversion process for synthesizing organosilicon compounds and/or polymers, and the choice of catalyst is crucial for reaction efficiency and selectivity. Isonitrile as a ligand, cannot only stabilize the low valence metal center, but also directly participate in the process of bond formation and cleavage. This study reported that a series of polyether functionalized isonitrile was prepared. The effectiveness of polyether functionalized isonitrile as ligand for nickel pivalate catalyzed hydrosilylation of olefins had been investigated.
✓ 已验证
DOI
高影响因子
Nano Research
·
2018
·Vol. 11
·期 5
·2544-2552
·
IF 7.994
Zai Huachao,Zhao Yizhou,Chen Shanyu,Ge Lei,Chen Changfeng,Chen Qi,Li Yujing
The identification of highly active heterogeneous catalysts to replace their homogeneous counterparts remains a challenge in the case of organic catalysts, especially polymers, in highly viscous reaction systems. In this work, we designed and synthesized a novel, solid-supported, and heterogeneous pseudo-single atom Pt catalyst with high activity and recyclability. Superparamagnetic Fe 3 O 4 -SiO 2 core–shell nanoparticles (NPs) were used as the substrate. The functionalization of the SiO 2 shell with silane coupling agents containing vinyl groups allows stabilizing Pt on the SiO 2 surface through complexation. The as-prepared pseudo-single atom Pt displays high activity in the hydrosilylation of allyl-terminated polyether with polymethylhydrosiloxane and could be easily collected by applying a magnetic field. The Pt/vinyl/SiO 2 /Fe 3 O 4 catalyst can be reused for up to four reaction cycles without appreciable decrease in activity. This work demonstrates a novel strategy for the design of pseudo-single atom noble metal catalysts for processes in high-viscosity media.
研究领域:
催化化学
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材料科学
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纳米技术
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有机合成
·
可持续化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2015
·Vol. 33
·期 10
·1431-1441
·
IF 1.835
Zhao Wen,Lin Bao-ping,Zhang Xue-qin,Sun Ying,Yang Hong
We describe in this work an alkyne-hydrosilylation approach to synthesize a series of novel polysiloxane side-chain LCPs attaching end-on or side-on mesogenic side groups. Their properties are characterized by NMR, FTIR, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry, polarized optical microscopy and small-angle X-ray scattering. These obtained alkenylsilane linked novel LCPs exhibit higher glass transition temperatures and clearing points, and especially display the tendency of forming smectic phases, in strong contrast with the nematic phases of their comparative conventional alkylsilane linked analogues, which manifests more rigid features of the alkenylsilane linkages and their significant influence on the mesomorphic properties.
研究领域:
高分子化学
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材料科学
·
液晶材料
·
有机合成
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2022
·
IF 4.198
Yi-Fan Wang,Yu-Han He,Yan Su,Yang Ji,Rui Li
A palladium complex coordinated with a chiral SIPHOS ligand was evaluated as an efficient catalyst for asymmetric hydrosilylation of β-silyl styrenes with trichlorosilane and 23 1,2-bis(silyl) chiral compounds were produced. Good to excellent enantioselectivities were observed with 1-aryl-2-silyl ethanols, where the trichlorosilyl groups of the hydrosilylation products were selectively converted into a hydroxyl group in the presence of pre-installed trialkylsilyl groups. Asymmetric hydrosilylation of β-silyl styrenes followed by methylation of the trichlorosilyl group gave stable 1,2-bis(silyl) chiral compounds 4 with excellent yields. DFT calculations of hydridopalladium B coordinated with a SIPHOS ligand, an intermediate of the hydrosilylation reaction, established the optical structures to be energy minima, and the structural information could well illustrate the enantioselectivity for the hydrosilylation reaction.
研究领域:
有机化学
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催化化学
·
理论计算化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Xunzhu Jiang,Xiang-Ting Min,Xiaoli Pan,Botao Qiao
The development of noble-metal single atom catalysts (SACs) with low valence is highly required for many important chemical reactions such as alkene hydrosilylation, but proves to be very challenging. Herein, we report a facile strategy for the precise construction of low-valent Pt SACs by preparing 0.1Pt 1 x Re 1 /NiO with varying Re density and find that the activity of Pt-catalyzed hydrosilylation is strongly dependent on the density of Re promoters. Spectroscopic characterizations reveal the electron transfer process from Re promoters to Pt sites is facilitated by denser Re atoms, forming Pt species with less electron deficiency. During alkene hydrosilylation, Pt species modified by adjacent Re single atoms can lower energy barrier of key reduction elimination step. As a result, the 0.1Pt 1 5Re 1 /NiO SAC exhibits a TOF of 2.38 × 10 5 h -1 , a 12-fold improvement over that of pristine 0.1Pt 1 /NiO.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Feihong Ye,Zhongxin Liu,Lu Zhou
To address the issues of low yield, high cost, and poor recyclability associated with conventional Pt-based catalysts in the hydrosilylation of fluorinated olefins , this study develops an efficient, stable, and economically sustainable RuCl 3 –FeCl 3 /C supported catalytic system . Through a systematic comparison of different supports (activated carbon, α-Al 2 O 3 , γ-Al 2 O 3 , and ZSM-5) and metal loadings, it was found that 5 wt% RuCl 3 supported on activated carbon achieved a perfluorohexylethyltrimethoxysilane (PFOT) yield of 58 % in the first cycle and maintained over 51 % after three cycles. Introducing FeCl 3 at a Ru:Fe molar ratio of 1:3 further enhanced catalytic performance, increasing the first-cycle yield to 79 % and maintaining over 76 % in subsequent cycles. XPS analysis revealed that Fe 3+ effectively suppresses the reduction of Ru 3+ to Ru 0 by forming an electronic buffer zone, thereby stabilizing the oxidation state of the active center and prolonging catalyst lifetime and selectivity. Kinetic studies confirmed that this synergistic effect reduced the apparent activation energy from 31 kJ/mol to 21 kJ/mol. Compared to existing Pt-based systems, the Ru–Fe bimetallic catalyst demonstrates a superior balance of catalytic activity , operational stability, economic feasibility , and industrial scalability.
✓ 已验证
产品关联
DOI
高影响因子
NPG Asia Materials
·
2019
·Vol. 11
·期 1
·1-9
·
IF 8.052
Wan Xizi,Gu Zhen,Zhang Feilong,Hao Dezhao,Liu Xi,Dai Bing,Song Yongyang,Wang Shutao
Janus films with asymmetric properties on opposite sides have been widely used to facilitate energy storage, ion transport, nanofiltration, and responsive bending. However, studies on Janus films rarely involve controlling surface adhesion, either dry or wet adhesion. Herein, we report Janus adhesive tape with an asymmetrically crosslinked polydimethylsiloxane (PDMS) network prepared through an interfacial hydrosilylation strategy, realizing wet/dry amphibious adhesion on various solid surfaces. The lightly crosslinked side of the Janus adhesive tape acts as an adhesive layer with high adhesion, and the highly crosslinked side functions as a supporting layer with high mechanical strength. This Janus adhesive tape with good adhesion and mechanical properties can be dyed different colors and can act as an underwater adhesive and a skin adhesive for wearable electronic devices. This study provides a promising design model for next-generation adhesive materials and related applications.
研究领域:
材料科学
·
界面化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2021
·
IF 2.369
Yingpeng Huo,Jiwen Hu,Yuanyuan Tu,Zhenzhu Huang,Shudong Lin,Xiaojiong Luo,Chao Feng
Reported herein is a magnetically separable heterogeneous nano catalyst Fe 3 O 4 @SiO 2 -biIMI- PtCl 2 , which is prepared by firstly applying a SiO 2 coating onto readily synthesized magnetite nanoparticles via the hydrolysis condensation of tetraethyl orthosilicate (TEOS) under basic conditions, then modifying it using aminopropyl triethoxysilane and bis(imidazole) aldehyde, and finally incorporating a PtCl 2 complex via coordination chemistry. The chemical structure and morphology of the nanocatalyst as well as the valence state and content of platinum within this catalyst were carefully characterized. This catalyst can mediate the hydrosilylation between 1-octene and hydrosilane, with the conversion of 1-octene reaching up to 99%, and it shows good regioselectivity as only β-adducts are identified. In addition, this catalyst can be reused for at least 5 cycles. The hydrosilylation reaction between different olefins and hydrosilanes can also be efficiently mediated by Fe 3 O 4 @SiO 2 -biIMI-PtCl 2 .
研究领域:
催化
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材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xinyu Wang,Luoqi Liu,Weihong Huang,Ying Bai,Jiayun Li,Jiajian Peng
Dehydroacetic acid [3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one, DHA] can provide O,O′-bidentate coordination sites, and the conjugated π system (CC–CO) in the dehydroacetic acid molecules can effectively stabilize the electronic state of the metal center. This characteristic makes dehydroacetic acid an important ligand in the fields of coordination chemistry and catalysis. A series of cobalt(II)-dehydroacetic acid complexes have been successfully prepared and utilized insoluble cobalt salts to support dehydroacetic acid, creating self-supported catalysts. These two types of catalysts can efficiently catalyze the hydrosilylation reaction of various olefins under mild conditions. Compared to traditional catalysts, these two types of catalysts not only exhibit significantly enhanced catalytic activity but also show superior selectivity for the reaction products.
研究领域:
无机化学
·
配位化学
·
催化化学
·
有机合成方法学
·
金属有机化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）