A thiourea-functionalized metal–organic macrocycle for the catalysis of Michael additions and prominent size-selective effect

2017 ◽  
Vol 46 (12) ◽  
pp. 4086-4092 ◽  
Author(s):  
Lu Yang ◽  
Liang Zhao ◽  
Zhen Zhou ◽  
Cheng He ◽  
Hui Sun ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Catalytic Performance ◽  
Size Selectivity ◽  
Selective Effect ◽  
Michael Additions ◽  
Metal Organic ◽  
Heterogeneous Phase

A discrete tetranuclear metal–organic macrocycle (MOM) containing thiourea groups as hydrogen bonding sites was prepared and exhibited a high catalytic performance in Michael additions of nitrostyrenes to nitroalkanes and size-selectivity in heterogeneous phase.

A nanoporous metal–organic framework as a renewable size-selective hydrogen-bonding catalyst in water

2019 ◽  
Vol 48 (31) ◽  
pp. 11855-11861 ◽  
Author(s):  
Yanhong Liu ◽  
Ju Ma ◽  
Pengyan Wu ◽  
Jia-Jia Zheng ◽  
Xueqin Tian ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Michael Addition ◽  
Addition Reaction ◽  
Metal Organic Framework ◽  
Michael Addition Reaction ◽  
Size Selectivity ◽  
Nanoporous Metal ◽  
Metal Organic ◽  
Reaction In Water

A new squaramide-containing nanoporous MOF as a bifunctional hydrogen-bond catalyst exhibits high size-selectivity and good renewability for a Michael addition reaction in water.

scholarly journals Theoretical hydrogen bonding calculations and proton conduction for Eu(iii)-based metal–organic framework

RSC Advances ◽  
2021 ◽  
Vol 11 (19) ◽  
pp. 11495-11499
Author(s):  
Lu Feng ◽  
Tian-Yu Zeng ◽  
Hao-Bo Hou ◽  
Hong Zhou ◽  
Jian Tian
Keyword(s):  
Hydrogen Bonding ◽  
Theoretical Calculation ◽  
Proton Transport ◽  
Metal Organic Framework ◽  
Proton Conduction ◽  
Transport Channel ◽  
Proton Conducting ◽  
Metal Organic ◽  
Organic Framework

A water-mediated proton-conducting Eu(iii)-MOF has been synthesized, which provides a stable proton transport channel that was confirmed by theoretical calculation.

scholarly journals Metal-Organic Frameworks in Oxidation Catalysis with Hydrogen Peroxide

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 283
Author(s):  
Oxana Kholdeeva ◽  
Nataliya Maksimchuk
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Metal Organic Frameworks ◽  
Short Review ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Catalyst Stability ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Organic

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.

Preferential adsorption of ethane over ethylene on a Zr-based metal-organic framework: impacts of C-H···N hydrogen bonding

2021 ◽  
Author(s):  
Yaping Zhang ◽  
Daofei Lv ◽  
Jiayu Chen ◽  
Zewei Liu ◽  
Chongxiong Duan ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Surface Area ◽  
Energy Efficient ◽  
Metal Organic Framework ◽  
Bet Surface Area ◽  
Preferential Adsorption ◽  
Metal Organic ◽  
Organic Framework

The separation of ethylene/ethane mixture using energy-efficient technologies is important but challenging. Here, we prepared a Zr-based metal-organic framework (MOF-545) possessing high Brunauer-Emmett-Teller (BET) surface area of 2265.4 m2/g, and...

Catalytic Performance of Zr‐Based Metal–Organic Frameworks Zr‐abtc and MIP‐200 in Selective Oxidations with H 2 O 2

2021 ◽  
Vol 27 (23) ◽  
pp. 6985-6992 ◽  
Author(s):  
Nataliya V. Maksimchuk ◽  
Irina D. Ivanchikova ◽  
Kyung Ho Cho ◽  
Olga V. Zalomaeva ◽  
Vasiliy Yu. Evtushok ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Catalytic Performance ◽  
Metal Organic

A New Organic-Inorganic Hybrid Based on L-Arginine and Polyoxoanion

2015 ◽  
Vol 1105 ◽  
pp. 335-338
Author(s):  
Qiong Wu ◽  
Jing Lu ◽  
Xiao Lin Ji ◽  
Tao Yu Zou ◽  
Zhen Fang Qiao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Sodium Cation ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Photocatalytic Activities ◽  
Metal Organic ◽  
Supramolecular Networks

Modifying polyoxometalates with organic and/or metal-organic moieties is a widely adopted method for broading the range of properties. In this work a new polyoxometalate constructed from Anderson-type polyoxoanions and L-arginine (Arg =L-arginine) molecules Na [CrMo6(OH)6O18]}(H2Arg)2·8H2O(1) has been synthesized via conventional method and characterized by routine techniques. Single-crystal X-Ray diffraction analysis shows that compound 1 is constructed by chiralL-arginine grafted Anderson-type clusters, sodium cation and water molecules which are further stabilized by hydrogen bonding interactions constitute 3D supramolecular networks. In addition, both antitumor behavior and photocatalytic activities of compound 1 were investigated.

Competition between coordination bonds and hydrogen bonding interactions in solvatomorphs of copper(II), cadmium(II) and cobalt(II) complexes with 2,2′-bipyridyl and acetate

2019 ◽  
Vol 234 (2) ◽  
pp. 119-128 ◽  
Author(s):  
José Antônio do Nascimento Neto ◽  
Cameron Capeletti da Silva ◽  
Leandro Ribeiro ◽  
Ana Karoline Silva Mendanha Valdo ◽  
Felipe Terra Martins
Keyword(s):  
Hydrogen Bonding ◽  
Dft Calculations ◽  
Organic Molecules ◽  
Energy Difference ◽  
Water Molecules ◽  
Coordination Numbers ◽  
Lattice Water ◽  
Hydrogen Bonding Interactions ◽  
Metal Organic ◽  
Coordination Bonds

Abstract The delicate balance among conformation, coordination bonds and hydrogen bonding has been probed in solvatomorphs of known metal-organic molecules synthesised from copper(II), cadmium(II) and cobalt(II) with acetate (OAc) and 2,2′-bipyridine (bipy). The Cu(OAc)2(bipy) complex, isolated as a pentahydrate, has the acetate ligands oriented to opposite sides of the coordination square plane. DFT calculations show the energy difference between this structure and a syn form amount to approximately 16 kJ/mol. The presence of lattice water enables the formation of O–H···O hydrogen bonds with the acetate ligands. Different coordination numbers and energies are found as a function of the number of water molecules co-crystallising in the Cd(OAc)2(bipy)(OH2)·3H2O and [Co(OAc)(bipy)2](OAc)·3H2O complexes.

Defect formation in metal–organic frameworks initiated by the crystal growth-rate and effect on catalytic performance

2017 ◽  
Vol 354 ◽  
pp. 84-91 ◽  
Author(s):  
Somboon Chaemchuen ◽  
Zhixiong Luo ◽  
Kui Zhou ◽  
Bibimaryam Mousavi ◽  
Suphot Phatanasri ◽  
...  
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Defect Formation ◽  
Metal Organic Frameworks ◽  
Catalytic Performance ◽  
Crystal Growth Rate ◽  
Metal Organic
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