Phenol Derivatives as Co-Crystallized Templates to Modulate Trimesic-Acid-Based Hydrogen-Bonded Organic Molecular Frameworks

Five host-guest trimesic-acid-based hydrogen-bonds framework compounds with different guests, namely [(TMA)(4)center dot(TMB)(3)] (1), [(TMA)(2)center dot(DMB)(1.5)] (2), [(TMA)(6)center dot(MP)] (3), [(TMA)center dot(EP)] (4) and [(TMA)center dot(PP)] (5) (TMA = trimesic acid, TMB = 1,3,5-trimethoxybenzene, DMB = 1,4-dimethoxybenzene, MP = 4-methoxyphenol, EP = 4-ethoxyphenol and PP = 4-propoxyphenol), were obtained through co-crystallization, and were characterized by elemental analysis, infrared spectroscopy analysis, and thermogravimetric analysis. The trimesic acid molecules comprise a hydrogen bonding six-membered cyclic host network that is found in a two-dimensional arrangement in compounds 1 and 2, and in a nine-fold interpenetrated three-dimensional structure in compound 3. In compounds 4 and 5, the trimesic acid and EP/PP molecules form a hydrogen-bonded six-membered cyclic network, resulting in a one-dimensional chain structure through O-H horizontal ellipsis O hydrogen bonds.

Automated summary

Five host-guest trimesic acid-based hydrogen-bond framework compounds with different guests were obtained through co-crystallization and characterized. These compounds showed different morphologies including two-dimensional, three-dimensional, and one-dimensional chain structures.