Self-assemblies of TTF derivatives programmed by alkyl chains and functional groups.

Tetrathiafulvalenes (TTFs) are a class of important functional materials whose intermolecular interaction, which will contribute to constructing a supramolecular structure, still needs further understanding. In this study, the self-assembly behavior and structure of a series of TTFs bearing different alkyl chains and substituents were investigated by scanning tunneling microscopy (STM) in combination with density functional theory (DFT) calculations. Contrary to previous reports, herein, a series of benzoic acid-functionalized TTFs (CTTFCOOH) and pyridine-functionalized TTFs (CTTFN) with different lengths of alkyl chains have been substituted on the sulfur atom, where n is equal to 8, 10, 14, or 16.

5,6-Dihydro-2H-1,3-dithiolo[4,5-b][1,4]dioxine-2-thione.

The title mol-ecule, C(5)H(4)O(2)S(3), consists of a planar [mean deviation = 0.020 (1) Å] 1,3-dithiole-2-thione unit with an ethyl-enedi-oxy group in the 4,5-positions. The dioxine ring is in a twist-chair conformation.