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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
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Reply to Comment on 'Chemical bonding in phase-change chalcogenides'
P C Müller1, S R Elliott2, R Dronskowski1
1Lehrstuhl für Festkörper- and Quantenchemie, Institut für Anorganische Chemie, RWTH Aachen University, D-52056 Aachen, Germany.
Summary
This study refutes claims that phase-change chalcogenide bonds are electron-deficient. Electron-counting rules confirm GeTe bonds are electron-rich, not multicentre, challenging prior interpretations.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Computational Chemistry
Background:
- Critique of the chemical bonding assignment in phase-change chalcogenides (e.g., GeTe).
- Previous work suggested electron-rich ('hypervalent') bonding.
- Commenters proposed electron-deficient and multicentre bonding models for (GeTe)1-x(Sb2Te3)x crystals.
Discussion:
- Electron-counting rules are applied to reassess the bonding character in GeTe.
- Demonstration of inaccuracies in the commenters' electron counting for GeTe.
- Explanation of why density-based methods like Quantum Theory of Atoms in Molecules (QTAIM) are insufficient alone for determining bonding character in solids.
Key Insights:
- The chemical bonds in GeTe are confirmed to be electron-rich, not electron-deficient or multicentre.
- Inaccurate electron counting is the primary reason for the commenters' alternative bonding model.
- Over-reliance on density-based calculations without complementary methods can lead to misinterpretations of bonding.
Outlook:
- Revisiting bonding analysis in related phase-change materials using rigorous electron-counting methods.
- Developing a more comprehensive theoretical framework for understanding bonding in complex chalcogenides.
- Guiding future experimental and computational studies on phase-change materials for electronic applications.
Keywords:
chalcogenide materialschemical bondingdensity functional calculationselectron-rich multicentre (‘hypervalent’) bondingphase-change materialsquantum theory of atoms in molecules (QTAIM)More Related Videos
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