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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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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Related Experiment Video

Updated: Aug 27, 2025

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

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Data-driven efficient synthetic exploration of anionic lanthanide-based metal-organic frameworks.

Yu Kitamura1, Yuiga Nakamura2, Kunihisa Sugimoto3

  • 1Department of Chemistry, School of Science, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1337, Japan. dtanaka@kwansei.ac.jp.

Chemical Communications (Cambridge, England)
|September 23, 2022
PubMed
Summary

Researchers explored lanthanide metal-organic frameworks (Ln-BDC-MOFs) using a data-driven method. This approach led to the discovery of new Ln-BDC-MOFs, KGF-15, effective for sensing copper ions.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Crystallography

Background:

  • Lanthanide metal-organic frameworks (Ln-BDC-MOFs) are advanced materials with diverse applications.
  • Previous synthetic efforts for Ln-BDC-MOFs have explored limited chemical spaces.
  • A systematic, data-driven approach is needed to uncover novel Ln-BDC-MOF structures.

Purpose of the Study:

  • To investigate the synthesis of lanthanide metal-organic frameworks with terephthalate (Ln-BDC-MOFs) using a data-driven strategy.
  • To identify and explore previously uncharted synthetic conditions for Ln-BDC-MOFs.
  • To discover new Ln-BDC-MOF materials with potential sensing applications.

Main Methods:

  • Data-driven analysis of existing Ln-BDC-MOF synthesis reports.
  • Visual mapping of synthetic parameter spaces.
  • Targeted synthesis within unexplored reaction regions.
  • Characterization of synthesized materials.

Main Results:

  • Identification of unexplored synthetic regions for Ln-BDC-MOFs.
  • Successful synthesis of a series of new anionic Ln-BDC-MOFs, designated KGF-15.
  • Demonstration of KGF-15's potential as luminescent sensors for Cu2+ ions.
  • Validation of the synthetic exploration approach for efficient material discovery.

Conclusions:

  • A data-driven approach effectively expands the accessible synthetic space for Ln-BDC-MOFs.
  • The newly synthesized KGF-15 material shows promise for luminescent sensing applications.
  • This methodology significantly reduces experimental effort in discovering novel Ln-BDC-MOFs.