A novel diacetylene derivative, N,N 0 -bis[5-(3-tolylaminocarbonyloxy)-1,3-pentadiynyl]-N,N 0 -diphenyl-1,4-phenylenediamine (1), was prepared, where two diacetylene groups were connected by a 1,4phenylenediamine moiety. The molecules stacked one-dimensionally and showed solid-statepolymerization reactivity above 80 C. The decay of the monomers at 100 C proceeded gradually without a marked induction period and was fully completed after 400 h. The obtained polymer was a crystalline solid judged by powder X-ray diffraction (PXRD) patterns and SEM imaging. The conjugated p-system of the obtained polymer was classified as a two-legged conjugated ladder. The polymer showed a broad absorption from the visible to the near IR region, indicating a decrease in the optical band gap of ca. 1.0 eV, because of the expansion of the p-conjugated system from a onedimensional system to a ladder. The ladder polymer showed high conductivity after I 2 doping from s 293K ¼ 5 Â 10 À12 S cm À1 to 1.2 Â 10 À5 S cm À1 . The conductivity depended heavily on the pressure of iodine and reached s 373K ¼ 2.3 Â 10 À1 S cm À1 . The activation energy of the ladder polymer was also estimated as 360 meV.

The novel diacetylenes, 9-(5-(4-nitrophenoxy)penta-1,3-diyn-1-yl)-9H-carbazole (1) and 4-((5-(9H-carbazol-9-yl)penta-2,4-diyn-1-yl)oxy)benzonitrile (2), were prepared and characterized by crystallographic analyses. Compound 1 gave two conformational polymorphs, 1-(I) and 1-(II), whose differences were concluded to originate in intermolecular interactions among nitrophenyl groups. Crystal 1-(I) and 2 had suitable molecular arrangements for solid-state polymerization and polymerized by thermal annealing to give crystalline polydiacetylenes (PDAs). While an arrangement of 1-(II) was unsuitable for the polymerization. The PDAs showed broad absorption from UV to

Supramolecular 3-chlorobenzo[b]thiophene heterocyclic host complex composed of chiral (1R,2S)-2-amino-1,2-diphenylethanol was successfully prepared using 3-chlorobenzo[b]thiophene-2-carboxylic acid. Four types of guest n-alkyl alcohols could be stored in one-dimensional channel-like cavities composed of chiral 21-helical columnar network structures. The release properties of the guest alcohol changed depending on the length of the alkyl chain in the alcohol.

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The title compound, C14H8Cl3NO2S, forms a dimeric structure by inter­molecular Cl⋯O=S inter­actions. The dimers make a two-dimensional array parallel to (101) by other Cl⋯O=S inter­actions. The two-dimensional network is found to be kept unchanged, although the trichloro­vinyl group is disordered (relative occupancies 0.65:0.35).