Matching Charge Towards Synthesis of Tetrazole Frameworks for Iodine Uptake
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Matching Charge Towards Synthesis of Tetrazole Frameworks for Iodine Uptake Yu Du1,2 · Jin Lu2 · Hui Chang2 · Yu‑Feng Li2 · Bi Foua claude Alain Gohi2 · Zhi‑Qiang Jiang1,2 Received: 1 April 2020 / Accepted: 19 May 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Up to now, the experience that matching the total and local charge in advance will effect on the success of synthesis for metal– organic frameworks has been confirmed. In this work, we report two tetrazole-frameworks based on binuclear and trinuclear cluster Zn, respectively, namely [ Zn2(btz)2(bdc)]·(solvents) (1) and [ Zn3(atz)(bdc)3]·(cation)·(solvents) (2) (bdc = 1,4-benzenedicarboxylate acid, btz = 5-benzyl-1H-tetrazole, atz = 5-amino-1H-tetrazole). The result showed that pre-computing the charge can determine whether ionic template agent should present in the synthetic process, which could perfect the intentionality of design and synthesis of crystalline materials. Meanwhile compound 1 also exhibited the characteristic of reversible adsorption of iodine. Graphic Abstract Presented here is that pre-computing the total and local charge can determine whether ionic template agent should be added during the synthetic process, which could perfect the intentionality of design and synthesis of metal-organic frameworks.
Keywords Matching charge · Iodine · Metal–organic frameworks · Tetrazole
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1 Introduction Since metal–organic frameworks (MOFs) as a new class of functional materials appeared in the mid-1990s, it has aroused wide interest in the fields of chemistry, materials, energy and physics [1–8]. During the formation process of MOFs, the positively charged metal ions with periodic arrangement can form inorganic nodes and further coordinate the arms of the organic linkers, which resulted in diverse intriguing structure and significant functionality for catalysis, luminescence, gas separation, storage of guest species, such as iodine uptake which is beneficial to tackle the serious environmental pollution from radioactive 129I [9–25]. In order to better understand and predict the intrinsic structure of MOFs, the strategy of secondary building units (SBUs) is generally used as synthetic module for the construction of intriguing frameworks, for example, the paddle-wheel M 2(CO2)4 unit in HKUST-1, trimeric M3O unit in MIL-101, tetranuclear M4O unit in MOF-5, and so on [26–28]. The intentional grafting of certain chemical groups on the organic ligands to generate isostructural MOFs can functionalize the framework [29, 30], which should extend its application area and improve related properties. Heterometallic SBUs has also been employed to build new MOFs and has further developed its application in recent years [31–33]. The premise behind the architecture and application is that the anticipative MOFs can be successfully synthesized. Thereby, changing the solvent component, modulating the reaction temperature and distributi
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