We prepared novel transition-metal (Ti, Ta, V) oxide fibers with chiral, helical, and nanotubular structures. The nanostructured metal oxide materials were provided by the sol-gel polymerization of metal alkoxides using chiral self-assemblies of organogelators as structure-directing agents. The chiral structures of the metal oxide fibers can be created by the formation of chiral self-assemblies constructed by organogelators and the transcription of the organogel superstructure into metal oxides.
trans-(1R,2R)-1,2-Cyclohexanedi(11-aminocarbonylundecylpyridinium) hexafluorophosphate (1) was synthesized. The sol−gel polymerization of Ti[OCH(CH3)2]4 using compound 1 as a self-assembled template afforded fibrous TiO2 materials with a “macaroni”-like structure. The unique structure of TiO2 could be created by the formation of a fibrous self-assembled aggregate and electrostatic interaction between anionic titania species and cationic 1 under basic conditions.
The relatively stable new thieno [3,4-~]thiophene derivatives, 1 -formyl-3,4,6-tris(isopropylthio)thieno[3,4-c]thiophene(3) and 1,6-diformyl-3,4-bis(isopropylthio)thieno[3,4-c]thiophene (4), have been prepared from Ir3,4,6-tetrakis(isopropylthio)thieno[3,4-~]thiophene (2) by substitution with the Vilsmeier reagent, and the structure of (4) has been determined by X-ray diffraction.
ChemInform Abstract The known thienothiophene (I) reacts with Vilsmeier's reagent to give the aldehydes (III) and (IV). The X-ray analysis of the bisaldehyde (IV) is reported.
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