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Weak Base Solutions03:21

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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
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[Ba

Kaixuan Ding1,2, Hongping Wu1, Zhanggui Hu1

  • 1Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, College of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 5, 2023
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a novel disulfide-bond-containing salt-inclusion chalcogenide, [Ba4(S2)][ZnGa4S10], which shows a wide bandgap and enhanced birefringence for infrared nonlinear optical applications.

Keywords:
π-conjugatednonlinear optical (NLO) materialspolychalcogenidessalt-inclusion chalcogenidesstructure-property relationship

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Optoelectronics

Background:

  • Salt-inclusion chalcogenides (SICs) are known for large second harmonic generation (SHG) and wide bandgaps.
  • However, most SICs have limited birefringence, restricting their practical use in nonlinear optics (NLO).

Purpose of the Study:

  • To synthesize a new type of SIC with improved birefringence.
  • To explore the potential of disulfide-bond-containing SICs for infrared (IR) NLO applications.

Main Methods:

  • Synthesis of a novel disulfide-bond-containing SIC, [Ba4(S2)][ZnGa4S10].
  • Characterization of its optical properties, including bandgap and birefringence.
  • Theoretical calculations to understand structure-property relationships.

Main Results:

  • The synthesized material, [Ba4(S2)][ZnGa4S10], exhibits the widest bandgap (3.39 eV) among polychalcogenides.
  • It demonstrates a strong SHG response comparable to AgGaS2 (AGS).
  • Crucially, it achieves a maximum birefringence of 0.053 at 1064 nm, surpassing other AGS-like SICs.

Conclusions:

  • The incorporation of π-conjugated (S2)2- units and covalent Ga-S layers enhances birefringence and SHG.
  • [Ba4(S2)][ZnGa4S10] is a promising IR NLO material with potential for advanced optical devices.
  • This work introduces a new class of SICs and offers design principles for future IR NLO materials.