scholarly journals Highly Efficient and Reusable Alkyne Hydrosilylation Catalysts Based on Rhodium Complexes Ligated by Imidazolium-Substituted Phosphine

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 608
Author(s):  
Olga Bartlewicz ◽  
Magdalena Jankowska-Wajda ◽  
Hieronim Maciejewski
Keyword(s):  
Good Alternative ◽  
Rhodium Complexes ◽  
Multiple Use ◽  
Homogeneous Catalysts ◽  
Highly Efficient ◽  
Alkyne Hydrosilylation

Rhodium complexes ligated by imidazolium-substituted phosphine were used as catalysts in the hydrosilylation of alkynes (1-heptyne, 1-octyne, and phenylacetylene) with 1,1,1,3,5,5,5-heptamethyltrisiloxane (HMTS) or triethylsilane (TES). In all cases, the above complexes showed higher activity and selectivity compared to their precursors ([Rh(PPh3)3Cl] and [{Rh(µ-Cl)(cod)}2]). In the reactions with aliphatic alkynes (both when HMTS and TES were used as hydrosilylating agents), β(Z) isomer was mainly formed, but, in the reaction of phenylacetylene with TES, the β(E) product was formed. The catalysts are very durable, stable in air and first and foremost insoluble in the reactants which facilitated their isolation and permitted their multiple use in subsequent catalytic runs. They make a very good alternative to the commonly used homogeneous catalysts.

Continuous Hydroformylation with Phosphine-Functionalized Polydimethylsiloxane Rhodium Complexes as Nanofilterable Homogeneous Catalysts

2015 ◽  
Vol 54 (43) ◽  
pp. 10656-10660 ◽  
Author(s):  
Zhuanzhuan Xie ◽  
Geoffrey R. Akien ◽  
Bibhas R. Sarkar ◽  
Bala Subramaniam ◽  
Raghunath V. Chaudhari
Keyword(s):  
Rhodium Complexes ◽  
Homogeneous Catalysts

scholarly journals Design of polystyrene latex particles covered with polyoxometalate clusters via multiple covalent bonding

2015 ◽  
Vol 51 (28) ◽  
pp. 6104-6107 ◽  
Author(s):  
Xinyue Chen ◽  
Hui Li ◽  
Panchao Yin ◽  
Tianbo Liu
Keyword(s):  
Emulsion Polymerization ◽  
Covalent Bonding ◽  
Polystyrene Latex ◽  
Polymerization Reaction ◽  
Homogeneous Catalysts ◽  
Latex Particles ◽  
Highly Efficient ◽  
Nano Structures ◽  
Polystyrene Latex Particles ◽  
Polymer Latex

Polyoxometalate clusters can be chemically grafted onto the surface of polymer latex via simple emulsion polymerization reaction. Such hierarchical nano-structures could serve as highly efficient quasi-homogeneous catalysts.

Hydrophilic CNC-Pincer Palladium Complexes: A Source for Highly Efficient, Recyclable Homogeneous Catalysts in Suzuki—Miyaura Cross-Coupling.

ChemInform ◽  
2007 ◽  
Vol 38 (4) ◽  
Author(s):  
Fatima Churruca ◽  
Raul SanMartin ◽  
Blanca Ines ◽  
Imanol Tellitu ◽  
Esther Dominguez
Keyword(s):  
Cross Coupling ◽  
Palladium Complexes ◽  
Homogeneous Catalysts ◽  
Highly Efficient

Hydrophilic CNC-Pincer Palladium Complexes: A Source for Highly Efficient, Recyclable Homogeneous Catalysts in Suzuki–Miyaura Cross-Coupling

2006 ◽  
Vol 348 (14) ◽  
pp. 1836-1840 ◽  
Author(s):  
Fátima Churruca ◽  
Raul SanMartin ◽  
Blanca Inés ◽  
Imanol Tellitu ◽  
Esther Domínguez
Keyword(s):  
Cross Coupling ◽  
Palladium Complexes ◽  
Homogeneous Catalysts ◽  
Highly Efficient

scholarly journals Assessment of Replacement of Metal Parts by BFRP Composites into a Highly Efficient Electrical Prototype

2021 ◽  
Vol 5 (4) ◽  
pp. 95
Author(s):  
Rosa Marat-Mendes ◽  
Diogo Ribeira ◽  
Luís Reis
Keyword(s):  
Epoxy Composite ◽  
Basalt Fiber ◽  
Experimental Tests ◽  
Good Alternative ◽  
Reinforced Composites ◽  
Basalt Fibers ◽  
Composite Part ◽  
Element Analysis ◽  
Mechanical Parts ◽  
Highly Efficient

This work intends to evaluate the use of epoxy composite materials reinforced with basalt fibers as replacement to metallic mechanical parts of a highly efficient electrical prototype. The analysis of the behavior of the original metallic bracket was made and an optimization process was carried out in order to achieve the most suitable geometry and stacking sequence if produced in composite material. Finite element analysis using Siemens NX12 and experimental tests to the produced composite part were performed in order to access it. It was verified that the total weight of the composite part shows a 45% reduction. The composite part shows a higher deformation than the metallic one due to basalt fiber’s higher flexibility. However, the advantages added by the new component largely compensate for the disadvantages that may have been added without compromising its performance. Obtained results show that the use of basalt fiber reinforced composites as the material of mechanical parts of a highly efficient electrical prototype that is a good alternative.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

Tuning the pore structures and photocatalytic properties of a 2D covalent organic framework with multi-branched photoactive moieties

Nanoscale ◽  
2020 ◽  
Vol 12 (30) ◽  
pp. 16136-16142
Author(s):  
Xuan Wang ◽  
Ming-Jie Dong ◽  
Chuan-De Wu
Keyword(s):  
Photocatalytic Properties ◽  
Effective Strategy ◽  
Covalent Organic Framework ◽  
Highly Efficient ◽  
Pore Structures ◽  
Local Connection ◽  
Organic Framework

An effective strategy to incorporate accessible metalloporphyrin photoactive sites into 2D COFs by establishing a 3D local connection for highly efficient photocatalysis was developed.

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