APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 8
·e5697
·
IF 3.14
Yingpeng Huo,Jiwen Hu,Yuanyuan Tu,Zhenzhu Huang,Shudong Lin,Yangfei Hu,Chao Feng
An imidazolyl Schiff base-containing periodic mesoporous organosilica (PMO) was synthesized via co-condensation reactions between a newly prepared bis (imidazolyl)imine-bridged bis silane and tetraethyl orthosilicate in the presence of cetyltrimethyl ammonium bromide as a soft template. The resultant as-synthesized PMO was then employed as a solid support for platinum catalysts. This complex was fully characterized via various techniques including FTIR, solid-state 13 C NMR, and 29 Si-NMR spectroscopy, as well as N 2 adsorption/desorption analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) methods. In addition, the catalyst was proven to efficiently mediate hydrosilylation reactions between olefins and hydrosilanes, and it can be reused for at least five cycles without significant loss of activity.
研究领域:
材料化学
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催化化学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 6
·3175-3183
·
IF 3.119
Weiwen Chen,Zhikai Xie,Hui Liang,Xinhua Zhou,Wenbin Hu,Xugang Shu
In this paper, we report the successful preparation of a novel bifunctional heterogeneous catalyst Ptδ+/SBA-APTE-SA with a partial positively charged Ptδ+ electronic structure via post-synthesis modification of (3-aminopropyl)triethoxysilane (APTE), succinic anhydride (SA) and platinum precursors. The resulting catalyst showed superior catalytic performance for the hydrosilylation of 1,1,1,3,5,5,5-heptamethyltrisiloxane (MDHM) with allyloxy polyethylene glycol (APEG) compared to a heterogeneous platinum catalyst. In addition, our catalyst was suitable for the hydrosilylation of other alkenes. Furthermore, the catalyst displayed sufficient stability after being reused five times without noticeable inactivation. In terms of cycle number and atomic utilization efficiency, it has potential applications as a green hydrosilylation method for industry.
研究领域:
催化
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材料科学
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有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70040
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IF 0
Jun Liu,Xinyu Wang,Ting Ouyang,Huilin Lan,Ying Bai,Jiayun Li,Yichen Huang,Jiajian Peng
Phosphate and pyrophosphate can advance green chemistry as nontoxic and sustainable catalysts. This study presents the development of a novel series of solid composite catalysts, comprising AlCl 3 and alkaline-earth metal (pyro)phosphates. The efficacy of these catalysts in facilitating the hydrosilylation of olefins with hydrosilanes has been thoroughly examined. Adding aluminum chloride enhances the catalytic activity of calcium phosphate for the catalysis hydrosilylation reaction, enabling efficient conversion of various linear alkenes into corresponding adducts with excellent yields. Furthermore, this catalytic system exhibits remarkable stability, maintaining its activity over 15 cycles without significant decrease.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
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2014
·
IF 0.827
Shunmin Ding,Shengjun Deng,Ning Zhang,Longhua Yang
Catalytic performances of Speier's catalyst with carboxylic acids were studied in the hydrosilylation reaction of styrene with triethoxysilane. The effect of carboxylic acids (RCOOH) with different pKa values and size was investigated, and the temperature and n(COOH)/n(Pt) ratios were also studied. The catalytic activity of the hydrosilylation reaction is related to the acid strength of the carboxylic acid, temperature, and n(COOH)/n(Pt) ratio, while the selectivity for the β-adduct is related to the size of carboxylic acid and the n(COOH)/n(Pt) ratio. Moreover, the influence of carboxylic acid on the hydrosilylation reaction was explained with the help of density functional theory calculations, and a reasonable mechanism was proposed.
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DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Muhua Chen,Peng Chen,Zhen Ji,Min Yu,Jihuai Tan,Bo Fu,Xinbao Zhu
The hydrosilylation reaction driven by a homogeneous catalyst has been widely used in the industrial synthesis of functionalized silicone compounds. However, the homogeneous catalyst for hydrosilylation has the shortcomings of nonrecyclability, undesirable side reactions, and high cost. In this work, a highly efficient heterogeneous catalyst was prepared by loading Pt ions on MIL-88 modified with trimethoxy[3-(phenylamino)propyl]silane. In comparison with previous research studies, the resulting catalyst can exhibit high catalytic activity and excellent stability during the hydrosilylation reaction, which was attributed to the presence of a pyrrolic nitrogen structure between TPA-MIL-88 and the Pt ion. Besides them, 1.2%Pt/TPA-MIL-88 showed the highest catalytic activity and can be reused five times without significant deactivation. Importantly, 1.2%Pt/TPA-MIL-88 also achieved satisfactory results when it was used to catalyze the hydrosilylation reaction for other olefins, implying great potential for application in the silicone industry.
研究领域:
化学工程
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催化
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2021
·
IF 1.082
Yingpeng Huo,Jiwen Hu,Feng Liu,Jiapei Wu,Yikun Zhang,Yalan Zhang,Qianyi Wang
A heterogeneous platinum catalyst with tridentate pyridine Schiff base ligands supported on silica gel is reported. The catalyst was fully characterized via FTIR, solid-state 13C NMR spectroscopy, X-ray photoelectron spectroscopy (XPS), N2 adsorption/desorption analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The catalyst showed potential application in mediating hydrosilylation reactions between olefins and hydrosilanes, and it can be reused for at least five cycles.
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DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Shuangping Xu,Wenqiang Ma,Hailiang Zhou,Yushu Zhang,Hongge Jia,Jingyu Xu,Pengfei Jiang,Xintian Wang,Wenwen Zhao
The synthesis of poly(methyhydrosiloxane) (PMHS) and N,N′-bis(3-allyl)pyromellitic diimide was optimized for O2/N2 separation. The membrane exhibits excellent mechanical and thermal properties and shows an O2/N2 selectivity of up to 4.44 with an O2 permeability of 31.0 Barrer; compared with polydimethylsiloxane (PDMS) and pure polyimide (PI) membranes, the separation selectivity shows a 107% increase for PDMS, and the permeation shows a 660% increase for pure PI. The obtained results were well above the ones reported on the literature for similar conditions opening the door for the preparation of a stable polysiloxane (PMHS-I) gas separation membrane with extraordinary O2/N2 separation performance.
研究领域:
材料科学
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化学工程
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膜技术
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气体分离
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产品关联
DOI
PubMed
高影响因子
Science China-Chemistry
·
2013
·Vol. 56
·期 8
·1152-1163
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IF 1.327
Xiao MinYu,Han HuanMei,Xiao ShouJun
Porous silicon (PSi) prepared from Pt metal-assisted chemical etching (MaCE) was demonstrated to possess higher hydrosilylation efficiency (∼57%) than anodized PSi (∼11%) by surface reaction with ω-undecenyl alcohol (UO). Deconvolution of the SiH x ( x = 1-3) stretching bands revealed the abundance of SiH2 species on MaCE PSi was 53%, ∼10% higher than on anodized samples, while both of SiH1 and SiH 3 were ∼5% lower correspondently on MaCE PSi than on anodized samples. The surface SiH x abundances were suggested to account for the higher hydrosilylation efficiency on MaCE PSi. Optimization of Pt-assisted chemical etching parameters suggested a 7–15 nm thick Pt-coating and an etching time of 3–10 min for biochip applications. Scanning electron microscopy images revealed that an isotropic top meso-porous layer was beneficial for hydrosilylation and long-term durability under ambient conditions. To end, an example of histidine-tagged protein immobilization and microarray was illustrated. Combining the materials’ property, surface chemistry, and micro-fabrication technology together, we envision that silicon based biochip applications have a prosperous future.
研究领域:
材料科学
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生物技术
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表面化学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2015
·Vol. 33
·期 5
·578-582
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IF 1.578
Minting Liang,Xiaofeng Xia,Xiang Liu,Hexing Li
In the presence of the inexpensive and non-toxic polymethylhydrosiloxane, the combination of copper(II) acetate and a chiral diphosphine displayed high catalytic efficiency in the asymmetric hydrosilylation of a series of aromatic ketones in air atmosphere and at room temperature. ( R )-1-Arylethanols were obtained with up to 99% yield and 93% enantiomeric excess. Meanwhile, the electron effect and steric hindrance of substituents on the aromatic ring had an interesting influence on both the yields and enantioselectivities. Furthermore, a possible mechanism was presented to explain the influence of some key factors on the reaction.
研究领域:
有机化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2023
·Vol. 93
·期 1
·120-127
·
IF 0.9
Huo Y. P.,Liu F.,Wu J. P.,Zhang Y. K.,Feng C. M.,Peng Y.
Abstract An imidazolyl Schiff base containing nitrogen-rich covalent organic polymer (COP) was synthesized via polycondensation reactions between bis(imidazolyl)imine-bridged bis silane and melamine under solvent thermal condition. The as-synthesized COP was then employed as a solid support for platinum catalyst. This heterogeneous catalyst was fully characterized via technics including FTIR, solid-state 13 C NMR, X-ray photoelectron spectroscopy (XPS), as well as N 2 absorption/desorption analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) methods. The catalyst was efficient in mediating hydrosilylation reactions between olefins and triethoxylsilane.
研究领域:
催化
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有机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Ruixing Gu,Xiao Li,Hao-Yang Mi,Jian Han,Chongzhao Zhang,Chuntai Liu,Changyu Shen
Silicone coatings with anti-smudge, anti-fingerprint, abrasion resistance, and ultraviolet (UV) resistance properties are increasingly demanded for touch screens as the development of artificial intelligence and human-computer interaction interfaces. Herein, a transparent, robust, and self-cleaning silicone coating was developed by incorporating cage-like structures and long carbon chains into a 3D cross-linked network via the rational combination of polymethylhydrosiloxane (PMHS), PSS-Octavinyl substituted (VPOSS), lauryl acrylate (LA), and 1,2-epoxy-4-vinylcyclohexane (EVCH) through hydrosilylation reaction with the presence of Karstedt catalysts. After introducing sealed diphenyliodonium phosphate (I-200), the silicone coating (PVLE-I-200) demonstrated excellent pencil hardness, anti-smudge, and abrasion resistance, and its average transmittance of visible light reached about 92 %. Owing to the low surface energy carbon chains, the coating showed amphiphobic properties and excellent anti-fingerprint property. The binding between cyclohexyl epoxy and glass substrate contributed to the high adhesion of the coating, which remained nearly intact and slightly reduced surface wettability after 500 friction cycles of sandpaper. In addition, the PVLE-I-200 coating demonstrated UV resistance which could withstand 200 h of UV irradiation attributed to the cage-like structure of VPOSS. The functional silicone coating provides insights into the development of environmentally friendly coatings for touch screens with high transparency, abrasion resistance, anti-smudge, and anti-fingerprint properties.
研究领域:
材料科学
·
化学工程
·
表面涂层
·
聚合物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2025
·
IF 2.4
Zhiqing Liu,Zepan Sun,Haifeng Zhang,Yajing Pan,Pei Liu,Chonggang Wu,Tao Hu
Mussel inspired polydopamine (PDA) has been extensively applied as a linker in noble metal based heterogeneous catalysts to promote either metal dispersion or metal-support interaction. Herein, three heterogeneous Pt catalysts were first prepared by depositing Pt on PDA encapsulated porous silica (SiO 2 -PDA-Pt) with different PDA coating degree and their catalytic activity toward two model hydrosilylation reactions between methyldichlorosilane and a non-polar 1-octene and a polar allyl cyanide were investigated. Meanwhile, stability and recyclability of these catalysts were also explored. Results show that PDA coating degree may directly influence both Pt loading and its oxidation state, which then resultantly tailor the activity of the supported catalysts. The SiO 2 -PDA-Pt catalysts all showed excellent activity even after six catalytic rounds even though a gradual loss of Pt species were observed. Among them, the activity of the one with lowest PDA coating exhibited both higher activity and better recyclability, which is mainly ascribed to a higher content and retention of more active low valent Pt 0 species that may be well stabilized by proper PDA coating.
研究领域:
催化化学
·
材料科学
✓ 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）