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Ligand

About: Ligand is a research topic. Over the lifetime, 67732 publications have been published within this topic receiving 1359684 citations. The topic is also known as: complexing agent & ligands.


Papers
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Journal ArticleDOI
10 Feb 2012-Science
TL;DR: A molecule is reported that mimics the structure of the proposed triangular active edge site fragments of molybdenum disulfide (MoS2), a widely used industrial catalyst that has shown promise as a low-cost alternative to platinum for electrocatalytic hydrogen production.
Abstract: Inorganic solids are an important class of catalysts that often derive their activity from sparse active sites that are structurally distinct from the inactive bulk. Rationally optimizing activity is therefore beholden to the challenges in studying these active sites in molecular detail. Here, we report a molecule that mimics the structure of the proposed triangular active edge site fragments of molybdenum disulfide (MoS(2)), a widely used industrial catalyst that has shown promise as a low-cost alternative to platinum for electrocatalytic hydrogen production. By leveraging the robust coordination environment of a pentapyridyl ligand, we synthesized and structurally characterized a well-defined Mo(IV)-disulfide complex that, upon electrochemical reduction, can catalytically generate hydrogen from acidic organic media as well as from acidic water.

1,078 citations

Book ChapterDOI
TL;DR: The main thrust of the present chapter is to describe a FORTRAN program named "SPECS" in such a way that it can be readily used by the largest number of investigators possible.
Abstract: Publisher Summary This chapter focuses on the computer programs for calculating total from specified free, or free from specified total ionic concentrations in aqueous solutions containing multiple metals and ligands. Many experiments in biology, biochemistry, biophysics, and physiology require aqueous solutions with concentrations of free cations, far below those obtainable by simply adding the corresponding salts to the solutions. Then metal buffers made up of the metallic ion (or cation) and the appropriate ligand (or anion) must be used. Similarly, living cells contain ligands, such as cation-binding proteins, that cause the total to differ from the free concentrations of metals. Ligands also bind hydrogen ions so that instead of a single complex between metal and ligand, several complexes form, corresponding to various degrees of protonation. Each has its own stability constant. Thus, apparent stability constants (K app ) have to be calculated to characterize the multiple equilibria among one metal, one ligand, and the hydrogen ion at a given pH value. The main thrust of the present chapter is to describe a FORTRAN program named "SPECS" in such a way that it can be readily used by the largest number of investigators possible.

1,045 citations

Journal ArticleDOI
TL;DR: Stable functionalised gold nanoparticles are prepared by simultaneous reduction of tetrachloroaurate ions and attachment of bifunctional organic thiol molecules to the growing gold nuclei leading to a material whose chemical behaviour is characterised by the vacant functionality of the bifunctionsal thiol ligand.
Abstract: Stable functionalised gold nanoparticles are prepared by simultaneous reduction of tetrachloroaurate ions and attachment of bifunctional organic thiol molecules to the growing gold nuclei leading to a material whose chemical behaviour is characterised by the vacant functionality of the bifunctional thiol ligand.

1,036 citations

Journal ArticleDOI
TL;DR: The dominant factor driving complex formation between these charged ligands and the nucleic acid is the entropic contribution from the release of counterions, which appears to drive the non-specific interactions of proteins with nucleic acids.

973 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202275
20212,355
20202,463
20192,413
20182,466
20172,498