scholarly journals Supramolecular porphyrin-based metal–organic frameworks: Cu(ii) naphthoate–Cu(ii) tetrapyridyl porphine structures exhibiting selective CO2/N2 separation

CrystEngComm ◽  
2017 ◽  
Vol 19 (35) ◽  
pp. 5173-5177 ◽  
Author(s):  
Tetsushi Ohmura ◽  
Norihiko Setoyama ◽  
Yusuke Mukae ◽  
Arimitsu Usuki ◽  
Shunsuke Senda ◽  
...  
Keyword(s):  
Pore Structure ◽  
Metal Organic Frameworks ◽  
Copper Acetate ◽  
Metal Organic

Porphyrin-based MOFs with copper acetate or copper 1-naphthoate exhibit different pore structure and unique CO2/N2 selectivity.

The Rise of Metal-Organic Frameworks for Electrolyte Applications

2021 ◽  
Author(s):  
Xia Hu ◽  
Qi Liu ◽  
Kui Lin ◽  
Cuipang Han ◽  
Baohua Li
Keyword(s):  
Chemical Composition ◽  
Pore Structure ◽  
Metal Organic Frameworks ◽  
Surface Functionality ◽  
Metal Organic

Metal−organic frameworks (MOFs) have been attracting a great attention for application in electrolytes. Benefiting from the controllable chemical composition, tunable pore structure and surface functionality, MOFs offer great opportunities for...

scholarly journals Application of CoMn/CoFe layered double hydroxide based on metal-organic frameworks template to activate peroxymonosulfate for 2, 4-dichlorophenol degradation

2021 ◽  
Author(s):  
Chenyu Liu ◽  
Haitong Wei ◽  
Yanhui Gao ◽  
Ning Wang ◽  
Xiaoying Yuan ◽  
...  
Keyword(s):  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Sites ◽  
Metal Organic Frameworks ◽  
High Specific Surface Area ◽  
State Transformation ◽  
Alkaline Conditions ◽  
Metal Organic

Abstract Metal-Organic Frameworks (MOFs) have unique properties and stable structure, which have been widely used as templates/precursors to prepare well-developed pore structure and high specific surface area materials. In this article, an innovative and facile method of crystal reorganization was designed by using MOFs as sacrificial templates to prepare LDH nano-layer sheet structure through a pseudomorphic conversion process under alkaline conditions. The obtained CoMn-LDH and CoFe-LDH catalysts broke the ligand of MOFs and reorganized the structure on the basis of retaining a high specific surface area and a large number of pores, which have higher specific surface area and well-developed pore structure than LDH catalysts prepared by traditional methods, and thus provide more active sites to activate PMS. Due to the unique framework structure of MOFs, the MOF derived CoMn-LDH and CoFe-LDH catalysts could provide more active sites to activate PMS, and achieve a 2, 4-dichlorophenol (2, 4-DCP) degradation of 99.3% and 99.2% within 20 min, respectively. Besides, the two LDH catalysts displayed excellent degradation performance for bisphenol A (BPA), ciprofloxacin (CIP) and 2, 4-dichlorophenoxyacetic acid (2, 4-D). XPS indicated that the valence state transformation of metal elements participated in PMS activation. EPR manifested sulfate radical () and singlet oxygen (1O2) were the main species for degrading pollutants. In addition, after the three-cycle experiment, the CoMn-LDH and CoFe-LDH catalysts also showed long-term stability with a slight activity decrease in the third cycle. The phytotoxicity assessment determined by the germination of mung beans proved that PMS activation by MOFs-derived LDH catalyst can basically eliminate the phytotoxicity of 2, 4-D solution. This research not only developed high-activity LDH catalysts for PMS activation, but also expanded the environmental applications of MOFs derivants.

Monte Carlo Simulations to Examine the Role of Pore Structure on Ambient Air Separation in Metal–Organic Frameworks

2018 ◽  
Vol 57 (28) ◽  
pp. 9240-9253 ◽  
Author(s):  
Sean M. McIntyre ◽  
Bohan Shan ◽  
Ruitong Wang ◽  
Congwei Zhong ◽  
Jichang Liu ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Pore Structure ◽  
Metal Organic Frameworks ◽  
Ambient Air ◽  
Air Separation ◽  
Metal Organic

Mesoporous Metal-Organic Frameworks with Size-, Shape-, and Space-Distribution-Controlled Pore Structure

2015 ◽  
Vol 27 (18) ◽  
pp. 2923-2929 ◽  
Author(s):  
Weina Zhang ◽  
Yayuan Liu ◽  
Guang Lu ◽  
Yong Wang ◽  
Shaozhou Li ◽  
...  
Keyword(s):  
Pore Structure ◽  
Metal Organic Frameworks ◽  
Space Distribution ◽  
Metal Organic ◽  
Mesoporous Metal

Formation of porous Cu hydroxy double salt nanoflowers derived from metal–organic frameworks with efficient peroxidase-like activity for label-free detection of glucose

Nanoscale ◽  
2018 ◽  
Vol 10 (25) ◽  
pp. 11948-11954 ◽  
Author(s):  
Ali Li ◽  
Xijiao Mu ◽  
Tianrong Li ◽  
Huang Wen ◽  
Wanchong Li ◽  
...  
Keyword(s):  
Colorimetric Detection ◽  
Metal Organic Frameworks ◽  
Copper Acetate ◽  
Double Salt ◽  
Label Free ◽  
Label Free Detection ◽  
Metal Organic

With a leaf-like MOF-5 as both a precursor and a template and copper acetate as a second precursor, CuHDS nanoflowers have been prepared for colorimetric detection of glucose.

Synergy Effect of Pore Structure and Amount of Carboxyl Site for Effective Removal of Pb2+ in Metal–Organic Frameworks

2019 ◽  
Vol 64 (6) ◽  
pp. 2728-2735 ◽  
Author(s):  
Xudong Zhao ◽  
Yaxin Wang ◽  
Yali Li ◽  
Wenjuan Xue ◽  
Jian Li ◽  
...  
Keyword(s):  
Pore Structure ◽  
Metal Organic Frameworks ◽  
Synergy Effect ◽  
Effective Removal ◽  
Metal Organic

Fine-Tuning Pore Structure of Metal–Organic Frameworks by Linker Substitution for Enhanced Hydrogen Storage and Gas Separation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xiwei Han ◽  
Chuan Yu ◽  
Xiaoxian Yang ◽  
Shuyan Lu ◽  
Ehsan Sadeghi Pouya ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Pore Structure ◽  
Gas Separation ◽  
Metal Organic Frameworks ◽  
Fine Tuning ◽  
Structure Of Metal ◽  
Metal Organic

Modification of the metal–organic frameworks (MOFs) by functionalizing ligands has been investigated for improved properties. In this work, by introducing substituents to the backbone of organic linkers, isostructural dihydroxy-/dialkoxy-functionalized Zr-MOFs...

Tyrosinase@HKUST-1: A Super Stable Biocatalyst Efficient for Catecholic Product Synthesis

2021 ◽  
Author(s):  
Xiao-Feng Lü ◽  
Chao-Yun Feng ◽  
Shuangfei Li ◽  
Guo-Hao Liu ◽  
Zhen Yang
Keyword(s):  
Immobilized Enzyme ◽  
Catalytic Properties ◽  
Metal Organic Frameworks ◽  
Copper Acetate ◽  
Structural Features ◽  
Pharmacological Effects ◽  
Mushroom Tyrosinase ◽  
Efficient Catalyst ◽  
Metal Organic ◽  
And Storage

Abstract Although metal-organic frameworks (MOFs) have been considered as promising matrices for enzyme immobilization, HKUST-1, constructed from copper acetate (CuAc2) and benzene 1,3,5-tricarboxylate (BTC), has rarely been explored for this application. In this study, mushroom tyrosinase (EC 1.14.18.1) was immobilized in the form of tyrosinase@HKUST-1 following a simple reaction procedure we developed. The order of mixing BTC with the enzyme prior to addition of CuAc2 is believed to be responsible for the super stability exhibited by the immobilized enzyme so formed. The resultant biocatalyst was characterized in both structural features and catalytic properties. Upon incorporation into the HKUST-1 frameworks, the enzyme gained a prominent enhancement in stability against pH, temperature and storage: When incubated at 50 oC and pH 6.0, tyrosinase@HKUST-1 presented a half-life of 32.6 h, which is 77-fold and over 10-fold higher than that of the free enzyme and its other immobilization forms, respectively; and the catalyst fully maintained its activity for at least 2 months when stored at 30 oC. The applicability of this new biocatalyst was demonstrated by employing it as catalyst for regioselective ortho-hydroxylation reactions to produce catecholic products with huge pharmacological effects, i.e., hydroxytyrosol and L-DOPA, with excellent yields and productivities. This study has thus offered a facile immobilization method to prepare a novel biocatalyst with super stability, and tyrosinase@HKUST-1 so formed from crude mushroom extract provides an efficient catalyst which can be applied to the production of catecholic products with health benefits.

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