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Related Concept Videos

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Preparation and Reactions of Sulfides02:26

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Valence Bond Theory02:42

Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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Responsive lanthanide coordination polymer for hydrogen sulfide.

Baoxia Liu1, Yang Chen

  • 1State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing, 210096, People's Republic of China.

Analytical Chemistry
|November 7, 2013
PubMed
Summary
This summary is machine-generated.

We developed a novel lanthanide coordination polymer (LCP) that detects hydrogen sulfide (H2S) with high sensitivity. This fluorescent material, utilizing terbium and silver ions, shows promise for biological applications.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Biochemistry

Background:

  • Metal-organic coordination polymers (MOCPs) offer tunable structures for diverse applications.
  • Lanthanide coordination polymers (LCPs) are explored for their unique luminescent properties.
  • Developing selective sensors for biologically relevant molecules like hydrogen sulfide (H2S) is crucial.

Purpose of the Study:

  • To design and synthesize a novel responsive lanthanide coordination polymer (LCP) for sensitive and selective detection of hydrogen sulfide (H2S).
  • To investigate the fluorescence quenching mechanism of the LCP upon interaction with H2S.
  • To evaluate the LCP's applicability for H2S determination in complex biological matrices like human serum.

Main Methods:

  • Self-assembly of biomolecule nucleotide with luminescent terbium (Tb3+) and sensitizing silver (Ag+) ions in aqueous solution to form LCP.
  • Characterization of the LCP's structure and photophysical properties.
  • Fluorescence spectroscopy to study the quenching effect of H2S on LCP fluorescence.
  • Application of the LCP sensor for H2S determination in human serum samples.

Main Results:

  • A highly fluorescent LCP was successfully synthesized, exhibiting enhanced luminescence due to Ag+ sensitization of Tb3+.
  • H2S strongly quenched the LCP's fluorescence, demonstrating high sensitivity and selectivity attributed to the high affinity of H2S for Ag+ ions.
  • The LCP sensor was effectively applied to quantify H2S in human serum.
  • The LCP exhibited a long fluorescence lifetime, enabling time-resolved fluorescence assays beneficial for biological samples.

Conclusions:

  • The designed LCP is a sensitive and selective fluorescent material for H2S detection.
  • The LCP's long fluorescence lifetime offers advantages for time-resolved fluorescence assays in biological systems, overcoming autofluorescence.
  • This LCP holds significant potential for the development of advanced biosensors for H2S analysis.