نتایج جستجو برای: chemical stability

تعداد نتایج: 662044  

Journal: :Dalton transactions 2015
Christoph Glotzbach Nadine Gödeke Roland Fröhlich Constantin-Gabriel Daniliuc Shohei Saito Shigehiro Yamaguchi Ernst-Ulrich Würthwein

A series of novel benzene centered mono-, bis- and tris-1,3,5-triazapentadiene ligands was synthesized and investigated with respect to their reactivity towards triphenylborane. The resulting blue-fluorescent boron complexes with a six-membered ring chelate structure show excellent thermal and chemical stability. All title compounds were completely characterized including X-ray diffraction stud...

Journal: :Chemical communications 2014
Henrik Hintz Stefan Wuttke

The suitability of four peptide coupling reagents for postsynthetic modification (PSM) of amino-tagged metal-organic frameworks (MOFs) with carboxylic acids was investigated. Mild reaction conditions at room temperature allow effective covalent attachment of drugs and biomolecules inside the pores of MOFs with moderate chemical stability.

Journal: :Chemical communications 2013
Dibyendu Mondal Mukesh Sharma Chandrakant Mukesh Vishal Gupta Kamalesh Prasad

The solubility of DNA in bio-based deep eutectic solvents (DESs) consisting of mixtures of choline chloride with levulinic acid, glycerol, ethylene glycol, sorbitol and resorcinol was investigated. The macromolecule was found to be soluble and chemically and structurally stable in DESs consisting of mixtures containing glycerol and ethylene glycol. Furthermore recyclability of the DESs was demo...

2016
Wei Feng Peng Long Yiyu Feng Yu Li

Fluorinated graphene, an up-rising member of the graphene family, combines a two-dimensional layer-structure, a wide bandgap, and high stability and attracts significant attention because of its unique nanostructure and carbon-fluorine bonds. Here, we give an extensive review of recent progress on synthetic methods and C-F bonding; additionally, we present the optical, electrical and electronic...

2018
Wenmei Ming Dongwen Yang Tianshu Li Lijun Zhang Mao-Hua Du

Solar cells based on methylammonium lead triiodide (MAPbI3) have shown remarkable progress in recent years and have demonstrated efficiencies greater than 20%. However, the long-term stability of MAPbI3-based solar cells has yet to be achieved. Besides the well-known chemical and thermal instabilities, significant native ion migration in lead halide perovskites leads to current-voltage hysteres...

2017
Jochen A. Kerres Henning M. Krieg

In view of the many possible applications such as fuel cells and electrolysers, recent interest in novel anion exchange membranes (AEMs) has increased significantly. However, their low conductivity and chemical stability limits their current suitability. In this study, the synthesis and characterization of several three- and four-component anion exchange blend membranes (AEBMs) is described, wh...

Journal: :Chemical communications 2014
Tommaso Avellini Christophe Lincheneau Marcello La Rosa Antonio Pertegás Henk J Bolink Iain A Wright Edwin C Constable Serena Silvi Alberto Credi

The solubility of luminescent quantum dots in solvents from hexane to water can be finely tuned by the choice of the countercations associated with carboxylate residues present on the nanocrystal surface. The resulting nanocrystals exhibit long term colloidal and chemical stability and maintain their photophysical properties.

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Yue-Xiao Shen Wen Si Mustafa Erbakan Karl Decker Rita De Zorzi Patrick O Saboe You Jung Kang Sheereen Majd Peter J Butler Thomas Walz Aleksei Aksimentiev Jun-li Hou Manish Kumar

Bioinspired artificial water channels aim to combine the high permeability and selectivity of biological aquaporin (AQP) water channels with chemical stability. Here, we carefully characterized a class of artificial water channels, peptide-appended pillar[5]arenes (PAPs). The average single-channel osmotic water permeability for PAPs is 1.0(± 0.3) × 10(-14) cm(3)/s or 3.5(± 1.0) × 10(8) water m...

Journal: :Science 2013
Hiroyasu Furukawa Kyle E Cordova Michael O'Keeffe Omar M Yaghi

Crystalline metal-organic frameworks (MOFs) are formed by reticular synthesis, which creates strong bonds between inorganic and organic units. Careful selection of MOF constituents can yield crystals of ultrahigh porosity and high thermal and chemical stability. These characteristics allow the interior of MOFs to be chemically altered for use in gas separation, gas storage, and catalysis, among...

Journal: :Small 2015
Pradeep Waduge Joseph Larkin Moneesh Upmanyu Swastik Kar Meni Wanunu

Freestanding graphene membranes are unique materials. The combination of atomically thin dimensions, remarkable mechanical robustness, and chemical stability make porous and non-porous graphene membranes attractive for water purification and various sensing applications. Nanopores in graphene and other 2D materials have been identified as promising devices for next-generation DNA sequencing bas...

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