Facile synthesis of high-purity single-twinned Au nanocrystals through manipulation of reaction kinetics

A highly efficient formate-piperidine-adduct based hydrogen storage system was developed. High-purity hydrogen can be produced with superior reaction kinetics under mild conditions. By integrating this system with renewable hydrogen and fuel cells, in-demand rechargeable hydrogen batteries could be realized for storing renewable energy.

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Facile synthesis of ultrafine and high purity spherical strontium carbonate via gas-liquid reaction

Materials Research Express ◽

10.1088/2053-1591/ab6e82 ◽

2020 ◽

Author(s):

Xingwu Zou ◽

Yanan Wang ◽

Shudong Liang ◽

Dongping Duan

Keyword(s):

High Purity ◽

Strontium Carbonate ◽

Facile Synthesis ◽

Liquid Reaction

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Facile synthesis of 3-arylidene-1,3-dihydroindol-2-ones catalysed by a Brønsted acidic ionic liquid

Journal of Chemical Research ◽

10.3184/030823408x374242 ◽

2008 ◽

Vol 2008 (11) ◽

pp. 642-643 ◽

Cited By ~ 4

Author(s):

Yi Hu ◽

Hui Kang ◽

Bi-Wen Zeng ◽

Ping Wei ◽

He Huang

Keyword(s):

Ionic Liquid ◽

High Purity ◽

Reaction Times ◽

Aromatic Aldehydes ◽

Environmentally Benign ◽

Facile Synthesis ◽

Acidic Ionic Liquid ◽

Brønsted Acidic Ionic Liquid ◽

High Yields ◽

Work Up

A series of 3-arylidene-1,3-dihydroindol-2-one derivatives were conveniently synthesised by the condensation of aromatic aldehydes with 1,3-dihydroindol-2-one using a Brønsted acidic ionic liquid as a dual solvent-catalyst. This method has the advantages of short reaction times, simple work-up, high yields with high purity, being environmentally benign and the ionic liquid can be reused.

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Synthesis of Reaction Bonded Silicon Nitride from High Purity Si Powders

MRS Proceedings ◽

10.1557/proc-249-495 ◽

1991 ◽

Vol 249 ◽

Author(s):

John S. Haggerty

Keyword(s):

Silicon Nitride ◽

Reaction Kinetics ◽

High Purity ◽

Open Porosity ◽

Chemical Characteristics ◽

Processing Conditions ◽

Powder Synthesis ◽

Physical And Chemical Characteristics ◽

Physical And Chemical ◽

Careful Processing

ABSTRACTSignificantly improved reaction kinetics and properties have been realized for reaction bonded Si3N4 (RBSN) by using Si powders having unusual physical and chemical characteristics combined with clean, oxygen-free processing conditions. For instance, complete nitridation can be achieved in < 1 h at 1150°C or < 100 m at 1250°C without pre-nucleation, or < 1 h at 1100°C with pre-nucleation. These compare with normal schedules of ∼100 h at 1470-1500°C. Resulting strengths (up to 870 MPa) and oxidation resistances of the RBSN essentially equal those of fully dense Si3N4 even though RBSN includes 25% open porosity. The results show that every aspect of the process, ranging from powder synthesis to < ppm levels of oxygen in the nitriding atmosphere, have demonstrable effects on the reaction kinetics and the resulting properties of the parts. With careful processing, reaction formed ceramics can compete advantageously with fully dense counterparts.

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Facile synthesis of CaCO3 and investigation on structural and optical properties of high purity crystalline calcite

Materials Science and Engineering B ◽

10.1016/j.mseb.2019.03.006 ◽

2019 ◽

Vol 243 ◽

pp. 78-85 ◽

Cited By ~ 3

Author(s):

N.H. Sulimai ◽

Rozina Abdul Rani ◽

Z. Khusaimi ◽

S. Abdullah ◽

M.J. Salifairus ◽

...

Keyword(s):

Optical Properties ◽

High Purity ◽

Structural And Optical Properties ◽

Facile Synthesis

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Facile synthesis of benzothiadiazine 1,1-dioxides, a precursor of RSV inhibitors, by tandem amidation/intramolecular aza-Wittig reaction

Beilstein Journal of Organic Chemistry ◽

10.3762/bjoc.9.54 ◽

2013 ◽

Vol 9 ◽

pp. 503-509 ◽

Cited By ~ 9

Author(s):

Krishna C Majumdar ◽

Sintu Ganai

Keyword(s):

High Purity ◽

Wittig Reaction ◽

Facile Synthesis ◽

The Core ◽

Amide Derivatives ◽

Acid Catalyzed ◽

Hydrolysis Of

Reaction of o-azidobenzenesulfonamides with ethyl carbonochloridate afforded the corresponding amide derivatives, which gave 3-ethoxy-1,2,4-benzothiadiazine 1,1-dioxides through an intramolecular aza-Wittig reaction. The reaction was found to be general through the synthesis of a number of benzothiadiazine 1,1-dioxides. Acid-catalyzed hydrolysis of 3-ethoxy-1,2,4-benzothiadiazine 1,1-dioxides furnished the 2-substituted benzothiadiazine-3-one 1,1-dioxides in good yields and high purity, which is the core moiety of RSV inhibitors.

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Structure and conformational analysis of spiroketals from 6-O-methyl-9(E)-hydroxyiminoerythronolide A

Beilstein Journal of Organic Chemistry ◽

10.3762/bjoc.11.157 ◽

2015 ◽

Vol 11 ◽

pp. 1447-1457 ◽

Cited By ~ 1

Author(s):

Ana Čikoš ◽

Irena Ćaleta ◽

Dinko Žiher ◽

Mark B Vine ◽

Ivaylo J Elenkov ◽

...

Keyword(s):

Double Bond ◽

Nmr Spectroscopy ◽

Conformational Analysis ◽

Reaction Kinetics ◽

Molecular Modelling ◽

Lactone Ring ◽

Facile Synthesis ◽

One Pot ◽

Unexpected Formation ◽

Spontaneous Change

Three novel spiroketals were prepared by a one-pot transformation of 6-O-methyl-9(E)-hydroxyiminoerythronolide A. We present the formation of a [4.5]spiroketal moiety within the macrolide lactone ring, but also the unexpected formation of a 10-C=11-C double bond and spontaneous change of stereochemistry at position 8-C. As a result, a thermodynamically stable structure was obtained. The structures of two new diastereomeric, unsaturated spiroketals, their configurations and conformations, were determined by means of NMR spectroscopy and molecular modelling. The reaction kinetics and mechanistic aspects of this transformation are discussed. These rearrangements provide a facile synthesis of novel macrolide scaffolds.

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