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Coordination Compounds and Nomenclature

Coordination Compounds and Nomenclature

In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...

Metal-Ligand Bonds

Metal-Ligand Bonds

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...

Coordination Number and Geometry

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.

Types of Semiconductors

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...

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Updated: Nov 18, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

Electrically Conductive Coordination Polymers for Electronic and Optoelectronic Device Applications.

Hao Liu^1,2, Yongshuai Wang^2,3, Zhengsheng Qin^2,3

¹Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

The Journal of Physical Chemistry Letters

|February 8, 2021

Summary

Electrically conductive coordination polymers, or metal-organic frameworks (MOFs), offer promising electronic and optoelectronic properties. This perspective explores design strategies, synthesis, and applications in devices, while highlighting future research directions.

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Area of Science:

Materials Science
Chemistry
Nanoscience

Background:

Coordination polymers, including metal-organic frameworks (MOFs), are hybrid crystalline materials formed from metal nodes and organic linkers.
These materials exhibit unique electronic and optical properties due to their combined inorganic and organic components.
Their potential in electronic and optoelectronic applications is significant but faces challenges.

Purpose of the Study:

To provide a fundamental understanding of electronic design strategies for enhancing conductivity and mobility in coordination polymers.
To review current synthetic approaches for creating high-quality conductive coordination polymers suitable for device integration.
To discuss the progress and challenges in applying these materials to various optoelectronic devices.

Main Methods:

Exploration of electronic design principles for coordination polymers.
Analysis of established synthetic methodologies for conductive MOFs.
Review of device performance in sensors, transistors, photovoltaics, and photodetectors.

Main Results:

Identification of key design strategies to achieve high conductivity and mobility in coordination polymers.
Demonstration of successful synthesis of conductive MOFs for device applications.
Overview of preliminary achievements in chemiresistive sensors, field-effect transistors, organic photovoltaics, and photodetectors.

Conclusions:

Electrically conductive coordination polymers show great promise for advanced electronic and optoelectronic devices.
Further research is needed to overcome existing hurdles in synthesis, processing, and device integration.
Future opportunities lie in optimizing material design and exploring novel device architectures.