Catalytic performance of a wide range of rare-earth titanate pyrochlore (RE2Ti2O7, RE = Sm, Gd, Dy, and Yb) microstructures in the epoxidation of cyclooctene: An electro-structural investigation

<div>The discovery of nanozymes for selective cleavage of proteins would boost the emerging areas of modern proteomics, however, the development of efficient and reusable artificial catalysts for peptide bond hydrolysis is challenging. Here we report the detailed catalytic properties of a microporous zirconium carboxylate metal-organic framework, MIP-201, in promoting peptide bond hydrolysis in a simple dipeptide, as well as in horse-heart myoglobin (Mb) protein that consists of 153 amino acids. We demonstrate that MIP-201 features an excellent catalytic activity and selectivity, a good tolerance toward reaction conditions covering a wide range of different pH values, and importantly, an exceptional recycling ability associated with easy regeneration process. Taking into account the excellent catalytic performance of MIP-201 and its other advantages such as 6-connected Zr6 cluster active sites, the green, scalable and cost-effective synthesis, and an outstanding chemical and architectural stability, our finding suggests that MIP-201 may be a promising and practical alternative to the current commercially available catalysts for peptide bond hydrolysis.</div>

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A Zirconium Metal-Organic Framework with SOC Topological Net for Catalytic Peptide Bond Hydrolysis

10.26434/chemrxiv.14472681 ◽

2021 ◽

Author(s):

Sujing Wang ◽

Antoine Tissot ◽

Guillaume Maurin ◽

Tatjana Parac-Vogt ◽

Christian Serre ◽

...

Keyword(s):

Active Sites ◽

Metal Organic Framework ◽

Cost Effective ◽

Peptide Bond ◽

Catalytic Performance ◽

Wide Range ◽

Horse Heart Myoglobin ◽

Metal Organic ◽

Effective Synthesis ◽

Organic Framework

<div>The discovery of nanozymes for selective cleavage of proteins would boost the emerging areas of modern proteomics, however, the development of efficient and reusable artificial catalysts for peptide bond hydrolysis is challenging. Here we report the detailed catalytic properties of a microporous zirconium carboxylate metal-organic framework, MIP-201, in promoting peptide bond hydrolysis in a simple dipeptide, as well as in horse-heart myoglobin (Mb) protein that consists of 153 amino acids. We demonstrate that MIP-201 features an excellent catalytic activity and selectivity, a good tolerance toward reaction conditions covering a wide range of different pH values, and importantly, an exceptional recycling ability associated with easy regeneration process. Taking into account the excellent catalytic performance of MIP-201 and its other advantages such as 6-connected Zr6 cluster active sites, the green, scalable and cost-effective synthesis, and an outstanding chemical and architectural stability, our finding suggests that MIP-201 may be a promising and practical alternative to the current commercially available catalysts for peptide bond hydrolysis.</div>

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Rare-earth metal oxide hybridized PtFe nanocrystals synthesized via microfluidic process for enhanced electrochemical catalytic performance

Electrochimica Acta ◽

10.1016/j.electacta.2018.12.132 ◽

2019 ◽

Vol 299 ◽

pp. 80-88 ◽

Cited By ~ 11

Author(s):

Jugang Ma ◽

Xin Tong ◽

Junmei Wang ◽

Gaixia Zhang ◽

Yuepeng Lv ◽

...

Keyword(s):

Rare Earth ◽

Metal Oxide ◽

Rare Earth Metal ◽

Earth Metal ◽

Catalytic Performance ◽

Rare Earth Metal Oxide

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Dehydration of Biomass-Derived Butanediols over Rare Earth Zirconate Catalysts

Catalysts ◽

10.3390/catal10121392 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1392

Author(s):

Asami Matsuda ◽

Yoshitaka Matsumura ◽

Kazuki Nakazono ◽

Fumiya Sato ◽

Ryoji Takahashi ◽

...

Keyword(s):

Rare Earth ◽

Flow Reactor ◽

Rare Earth Metals ◽

Fluorite Structure ◽

Catalytic Performance ◽

High Specific Surface Area ◽

Heavy Rare Earth ◽

High Crystallinity ◽

Unsaturated Alcohols ◽

Selective Formation

The aim of this work is to develop an effective catalyst for the conversion of butanediols, which is derivable from biomass, to valuable chemicals such as unsaturated alcohols. The dehydration of 1,4-, 1,3-, and 2,3-butanediol to form unsaturated alcohols such as 3-buten-1-ol, 2-buten-1-ol, and 3-buten-2-ol was studied in a vapor-phase flow reactor over sixteen rare earth zirconate catalysts at 325 °C. Rare earth zirconates with high crystallinity and high specific surface area were prepared in a hydrothermal treatment of co-precipitated hydroxide. Zirconates with heavy rare earth metals, especially Y2Zr2O7 with an oxygen-defected fluorite structure, showed high catalytic performance of selective dehydration of 1,4-butanediol to 3-buten-1-ol and also of 1,3-butanediol to form 3-buten-2-ol and 2-buten-1-ol, while the zirconate catalysts were less active in the dehydration of 2,3-butanediol. The calcination of Y2Zr2O7 significantly affected the catalytic activity of the dehydration of 1,4-butanediol: a calcination temperature of Y2Zr2O7 at 900 °C or higher was efficient for selective formation of unsaturated alcohols. Y2Zr2O7 with high crystallinity exhibits the highest productivity of 3-buten-1-ol from 1,4-butanediol at 325 °C.

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Wide Range Magnetoresistance in Rare Earth Manganite Through Substitution of Magnetic Impurity

IEEE Transactions on Magnetics ◽

10.1109/tmag.2011.2169979 ◽

2012 ◽

Vol 48 (3) ◽

pp. 1155-1158 ◽

Cited By ~ 2

Author(s):

Reena Singh ◽

Deepika Bhuwal ◽

Rashmi Yadav ◽

Subhash Khatarkar ◽

Vilas Shelke

Keyword(s):

Rare Earth ◽

Magnetic Impurity ◽

Rare Earth Manganite ◽

Wide Range

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Formation enthalpies of rare earth titanate pyrochlores

Journal of Solid State Chemistry ◽

10.1016/j.jssc.2004.01.009 ◽

2004 ◽

Vol 177 (6) ◽

pp. 1858-1866 ◽

Cited By ~ 122

Author(s):

K.B. Helean ◽

S.V. Ushakov ◽

C.E. Brown ◽

A. Navrotsky ◽

J. Lian ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Titanate ◽

Formation Enthalpies

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Crystal chemistry of hydrothermally grown ternary alkali rare earth fluorides

Acta Crystallographica Section B Structural Science Crystal Engineering and Materials ◽

10.1107/s2052520615017916 ◽

2015 ◽

Vol 71 (6) ◽

pp. 768-776 ◽

Cited By ~ 4

Author(s):

Colin D. McMillen ◽

Sara Comer ◽

Kyle Fulle ◽

Liurukara D. Sanjeewa ◽

Joseph W. Kolis

Keyword(s):

Rare Earth ◽

Single Crystal ◽

Single Crystals ◽

Structural Information ◽

Structure Type ◽

Crystal Structure Analysis ◽

Structural Variations ◽

Ionic Radii ◽

Wide Range ◽

Potential Applications

The structural variations of several alkali metal rare earth fluoride single crystals are summarized. Two different stoichiometric formulations are considered, namely those of ARE2F7 and ARE3F10 (A = K, Rb, Cs; RE = Y, La–Lu), over a wide range of ionic radii of both the alkali and rare earth (RE) ions. Previously reported and several new single-crystal structures are considered. The new single crystals are grown using hydrothermal methods and the structures are compared with literature reports of structures grown from both melts and hydrothermal fluids. The data reported here are combined with the literature data to gain a greater understanding of structural subtleties surrounding these systems. The work underscores the importance of the size of the cations to the observed structure type and also introduces synthetic technique as a contributor to the same. New insights based on single-crystal structure analysis in the work introduce a new disordered structure type in the case of ARE2F7, and examine the trends and boundaries of the ARE3F10 stoichiometry. Such fundamental structural information is useful in understanding the potential applications of these compounds as optical materials.

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