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Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
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Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
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Cotemplating Assembly and Structural Variation of Three-Dimensional Open-Framework Sulfides.

Yan-Hua Li1, Yan Liu1, Yong-Kang Guo1

  • 1Department of Chemistry , Dalian University of Technology , Dalian 116024 , China.

Inorganic Chemistry
|October 16, 2019
PubMed
Summary
This summary is machine-generated.

New open-framework sulfides were synthesized using alkali-metal and protonated water cations as cotemplates. These cations direct the formation of unique one-dimensional channels within the sulfide structures, influencing their overall framework.

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Area of Science:

  • Materials Chemistry
  • Inorganic Synthesis
  • Solid-State Chemistry

Background:

  • Open-framework materials offer tunable properties for various applications.
  • The synthesis of complex sulfide frameworks often requires precise control over structure-directing agents.
  • Alkali-metal cations and protonated water are known to influence the dimensionality and topology of inorganic frameworks.

Purpose of the Study:

  • To explore the synthesis of novel open-framework sulfides using a cotemplating strategy.
  • To investigate the role of alkali-metal and protonated water cations in directing the formation of 3D sulfide frameworks.
  • To examine the structural impact of introducing cesium cations into these systems.

Main Methods:

  • Hydrothermal synthesis employing a cotemplating strategy with alkali-metal and protonated water cations.
  • Single-crystal X-ray diffraction for structural determination of synthesized compounds.
  • Systematic variation of cation composition to study structural evolution.

Main Results:

  • Two new open-framework sulfides, (H3O)KCu6Ge2S8 (1) and (H3O)RbCu6Ge2S8 (2), were successfully synthesized.
  • The cotemplate cations (alkali-metal and H3O+) direct the formation of parallel one-dimensional channels within the frameworks.
  • Introduction of Cs+ resulted in (H3O)K0.6Cs0.4Cu6Ge2S8 (3) with a distinct framework and (H3O)Rb0.75Cs0.25Cu6Ge2S8 (4) isostructural to 1 and 2.

Conclusions:

  • The cotemplating strategy is effective for constructing complex 3D open-framework sulfides.
  • Alkali-metal and protonated water cations play crucial roles in templating specific channel architectures.
  • Cation composition significantly influences the resulting framework topology, allowing for structural diversification.