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Encapsulation of Various Guests by an Anionic In-Metal-Organic Framework Containing Tritopic BTB Ligand: Crystal Structure of Reichardt's Dye Captured in an In-Metal-Organic Framework

초록/요약

The reaction between 1,3,5-benzenetribenzoic acid (H3BTB) and In(NO3)(3) hydrate in diethylformamide yielded a new In-III-metal-organic framework, [(CH3CH2)(2)NH2](3)[In-3(BTB)(4)]center dot 10DEF center dot 14H(2)O (I). The countercation and solvent-free doubly interpenetrated I potentially contains 71.0% of solvent accessible void. Although the framework of I was not stable enough to maintain its original structure when the solvent molecules were removed, the as-prepared I was found to be a very good sorbent for acridine orange hydrochloride, a large Reichardts dye, and hydrophobic iodine molecule in solution. The as-prepared I exhibited increased uptake amount in the order of Reichardts dye > acridine orange hydrochloride > iodine. The largest uptake of the bulky Reichardts dye by I could be attributed to the optimized structural fitting of Reichardts dye into the large three-dimensional void space of I. The structure of Reichardts dye-encapsulated I_RD was unambiguously revealed by X-ray crystallography for the first time

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