From Frustrated Packing to Tecton-Driven Porous Molecular Solids
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 13, 2020
- Source ID
- 10.3390/chemistry2010011
Entities
People
- Abhijeet S Sinha
- Chamara Gunawardana
- Christer B Aakeröy
- Eric W. Reinheimer
Organizations
- National Science Foundation
- United States Army Research Laboratory