From Frustrated Packing to Tecton-Driven Porous Molecular Solids by Chamara A. Gunawardana Abhijeet S. Sinha Eric W. Reinheimer & Christer B. Aakeröy

Author:Chamara A. Gunawardana, Abhijeet S. Sinha, Eric W. Reinheimer & Christer B. Aakeröy
Format: pdf
Tags: Structurally divergent molecules containing bulky substituents tend to produce porous materials via frustrated packing. Two rigid tetrahedral cores, tetraphenylmethane and 1,3,5,7-tetraphenyladamantane, grafted peripherally with four (trimethylsilyl)ethynyl moieties, were found to have only isolated voids in their crystal structures. Hence, they were modified into tecton-like entities, tetrakis(4-(iodoethynyl)phenyl)methane [I4TEPM] and 1,3,5,7-tetrakis(4-(iodoethynyl)phenyl)adamantane [I4TEPA], in order to deliberately use the motif-forming characteristics of iodoethynyl units to enhance crystal porosity. I4TEPM not only holds increased free volume compared to its precursor, but also forms one-dimensional channels. Furthermore, it readily co-crystallizes with Lewis basic solvents to afford two-component porous crystals., crystal engineering; porous material; molecular recognition; halogen bond; co-crystal; molecular tecton; binary solid; network structure; -hole; molecular electrostatic potential


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