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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Coordination Number and Geometry02:57

Coordination Number and Geometry

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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.
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Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

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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...
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
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Alkyl Halides02:45

Alkyl Halides

20.1K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Electron Transport Chains01:28

Electron Transport Chains

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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Meltable Semiconductive Lead-Thiolate Coordination Polymers with Long Alkyl Chains.

Ryohei Akiyoshi1, Shunya Takamura1, Chie Sawada1

  • 1Department of Chemistry, Kwansei Gakuin University, Sanda, Hyogo, Japan.

Angewandte Chemie (International Ed. in English)
|February 9, 2026
PubMed
Summary

Researchers developed new meltable semiconducting coordination polymers (CPs) using lead and benzenethiolate ligands. These materials enable melt processing for optoelectronics and show improved semiconducting properties compared to traditional analogues.

Keywords:
coordination polymerlead–thiolate networklong alkyl chainmeltingsemiconductor

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Area of Science:

  • Materials Science
  • Organic-Inorganic Hybrid Materials
  • Semiconductor Research

Background:

  • Meltable organic-inorganic hybrid semiconductors offer advantages for melt-based processing.
  • Meltable semiconducting metal halide perovskites are well-studied, but meltable semiconducting coordination polymers (CPs) are less common.
  • CPs offer excellent structural designability and tunable optoelectronic properties.

Purpose of the Study:

  • To report a new family of meltable semiconductive lead(II) benzenethiolate CPs.
  • To investigate the structure-property relationships of these CPs.
  • To establish a design strategy for melt-processable semiconductive CPs.

Main Methods:

  • Synthesis of novel Pb(II) benzenethiolate CPs with long alkyl chains ([Pb(SPhOC6)2]n) and a classical analogue ([Pb(SC6)2]n).
  • Single-crystal X-ray diffraction for structural analysis.
  • Comprehensive characterization of semiconducting properties and first-principles calculations.

Main Results:

  • Two distinct 2D architectures with different inorganic (-Pb-S-)n networks were identified for KGF-34(C6) and KGF-59(C6).
  • KGF-34(C6) showed higher photoconductivity, a narrower band gap, and larger band dispersion than KGF-59(C6).
  • Both CPs exhibited phase transitions, including melting and liquid crystalline formation, enabling melt processing.

Conclusions:

  • This work presents the first meltable semiconducting CPs based on benzenethiol-derived ligands.
  • Differences in inorganic network structures significantly impact semiconducting properties.
  • These findings provide a rational design approach for developing melt-processable semiconductive metal-benzenethiolate CPs.