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Alkali Metals03:06

Alkali Metals

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
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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.
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Properties of Transition Metals

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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Fluorescence proximity assay based on a metal-organic framework platform.

Guangyao Zhang1, Haifeng Dong, Xueji Zhang

  • 1Beijing Key Laboratory for Bioengineering and Sensing Technology, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China. zhangxueji@ustb.edu.cn.

Chemical Communications (Cambridge, England)
|June 27, 2019
PubMed
Summary

A new fluorescence proximity assay (FPA) using a metal-organic framework (MOF) platform enables highly sensitive and selective protein detection. This innovative method advances biomolecular detection capabilities.

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Area of Science:

  • Biochemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Protein detection is crucial in diagnostics and research.
  • Existing assays face limitations in sensitivity and selectivity.
  • Metal-organic frameworks (MOFs) offer unique properties for assay development.

Purpose of the Study:

  • To develop a novel fluorescence proximity assay (FPA) for protein detection.
  • To utilize a metal-organic framework (MOF) platform for enhanced assay performance.
  • To achieve highly sensitive and selective detection of target proteins.

Main Methods:

  • Development of a fluorescence proximity assay.
  • Integration of a metal-organic framework (MOF) platform.
  • Optimization of assay conditions for protein detection.

Main Results:

  • The developed FPA demonstrated high sensitivity.
  • The assay exhibited excellent selectivity for target proteins.
  • The MOF platform facilitated improved assay performance.

Conclusions:

  • The novel FPA based on MOFs is effective for sensitive and selective protein detection.
  • This platform holds potential for various applications in diagnostics and research.
  • Further studies can explore its utility with different protein targets.