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A co-crystal was obtained based on donor-acceptor interactions. The obvious charge transfer from the linear donor to the triangular acceptor units results in a quasi-two-dimensional CT complex with excellent near-infrared photothermal conversion efficiency. The co-crystals further acted as an excellent photothermal material in seawater desalination.

A couple of novel triptycene-derived calix[6]arenes with fixed conformations were synthesized, and shown to form tubular assemblies with aromatic rings as the walls and phenolic hydroxyl groups situated in the cavities, in the solid state.

The title compound, C13H8Cl2N2, was prepared by reaction of ο-phenyl­enediamine with 2,4-dichloro­benzaldehyde under reflux in ethanol. The dihedral angle between the benzimidazole system and the benzene ring is 42.00 (15)°. In the crystal structure, intermolecular N—H⋯N inter­actions are present.

The title compound, C14H16N2O2S, was prepared by the reaction of benzaldehyde, ethyl acetoacetate and thio­urea sulfate. There are weak inter­molecular hydrogen-bond inter­actions in the crystal structure, involving the amine and thio­ketone groups as donors and acceptors, respectively.

The title compound, C18H16N4O, was prepared by the reaction of 5-phenyl-1H-pyrazole-3-carbohydrazide with 4-methyl­benzaldehyde in refluxing ethanol. The structure exhibits weak inter­molecular N—H⋯O and N—H⋯N hydrogen-bonding inter­actions.

The title compound, C11H15NOS, was prepared by the reaction of phenyl isothio­cyanate with isobutyl alcohol at room temperature. The central CNC(=S)O group is essentially planar. In the crystal structure, the mol­ecules are connected via N—H⋯S inter­actions.