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    <pageLast>21464</pageLast>
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    <issue>43</issue>
    <volume>127</volume>
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    <title language="eng">Effects of Ligand Substituents on the Character of Zn-Coordination in Zeolitic Imidazolate Frameworks</title>
    <abstract language="eng">Due to their favorable properties and high porosity, zeolitic imidazolate frameworks (ZIFs) have recently received much limelight for key technologies such as energy storage, optoelectronics, sensorics, and catalysis. Despite widespread interest in these materials, fundamental questions regarding the zinc coordination environment remain poorly understood. By focusing on zinc(II)2-methylimidazolate (ZIF-8) and its tetrahedrally coordinated analogues with Br-, Cl-, and H-substitution in the 2-ring position, we aim to clarify how variations in the local environment of Zn impact the charge distribution and the electronic properties of these materials. Our results from densityfunctional theory confirm the presence of a Zn coordinative bond with a large polarization that is quantitatively affected by different substituents on the organic ligand. Moreover, our findings suggest that the variations in the Zn coordination induced by the functionalization have a negligible effect on the electronic structure of the considered compounds. On the other hand, halogen terminations of the ligands lead to distinct electronic contributions in the vicinity of the frontier region which ultimately reduce the band gap size by a few hundred millielectron volts. Experimental results obtained from X-ray absorption spectroscopy (Zn K-edge) confirm the trends predicted by theory and, together with them, contribute to a better understanding of the structure−property relationships that are needed to tailor ZIFs for target applications.</abstract>
    <parentTitle language="eng">The Journal of Physical Chemistry C</parentTitle>
    <identifier type="doi">10.1021/acs.jpcc.3c06054</identifier>
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    <author>Joshua Edzards</author>
    <author>Holger-Dietrich Saßnick</author>
    <author>Ana de Oliveira Guilherme Buzanich</author>
    <author>Ana M. Valencia</author>
    <author>Franziska Emmerling</author>
    <author>Sebastian Beyer</author>
    <author>Caterina Cocchi</author>
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