| Summary: | Five host−guest trimesic-acid-based hydrogen-bonds framework compounds with different guests, namely [(TMA)<sub>4</sub>·(TMB)<sub>3</sub>] (<b>1</b>), [(TMA)<sub>2</sub>·(DMB)<sub>1.5</sub>] (<b>2</b>), [(TMA)<sub>6</sub>·(MP)] (<b>3</b>), [(TMA)·(EP)] (<b>4</b>) and [(TMA)·(PP)] (<b>5</b>) (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 <b>1</b> and <b>2</b>, and in a nine-fold interpenetrated three-dimensional structure in compound <b>3</b>. In compounds <b>4</b> and <b>5</b>, 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…O hydrogen bonds.
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