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Full-Text Articles in Physical Sciences and Mathematics
Bistable Linear Electro-Optical Switching In The B-7 ' Phase Of Novel Bent-Core, S. Umadevi, Antal Jakli, B. K. Sadashiva
Bistable Linear Electro-Optical Switching In The B-7 ' Phase Of Novel Bent-Core, S. Umadevi, Antal Jakli, B. K. Sadashiva
Antal Jakli
Three novel symmetrical bent-core compounds were synthesized where the terminal alkoxy linkages of the original bent-core inesogen forming a B-2 phase was converted to n-alkyl carboxylates. It is found that instead of the B-2 phase, all three compounds exhibit a transition between B-7' and B-2 mesophases. The physical and electro-optical properties have been investigated by polarizing optical microscopy, differential scanning calorimetry, X-ray diffraction and electric field experiments. The higher temperature B-7' phase has been shown to exhibit bistable but analogous linear electro-optical Switching Without,my observable polarization peak. We analyze two theoretical models and find that a local triclinic symmetry may …
A Flip-Disorder In The Structure Of 3-[2-(Anthracen-9-Yl)Ethenyl]Thiophene, Pawel Wagner, David L. Officer, Maciej Kubicki
A Flip-Disorder In The Structure Of 3-[2-(Anthracen-9-Yl)Ethenyl]Thiophene, Pawel Wagner, David L. Officer, Maciej Kubicki
Australian Institute for Innovative Materials - Papers
In the crystal structure of the title compound, C20H14S, the thiophene rings are disordered; such a flip-type disorder is typical for simple, monosubstituted thiophene derivatives. Two planar fragments, the thiophene and the anthracene units, are almost perpendicular in order to relieve the H⋯H steric strains. The crystal packing is determined by van der Waals interactions, π–π stacking between the anthracene fragments, and some weak C—H⋯S and C—H⋯π short directional contacts.
2,5-Bis(2-Cyano-2-Thienylvinyl)Thiophene, Pawel Wagner, David L. Officer, Maciej Kubicki
2,5-Bis(2-Cyano-2-Thienylvinyl)Thiophene, Pawel Wagner, David L. Officer, Maciej Kubicki
Australian Institute for Innovative Materials - Papers
In the crystal structure of the title compound, C18H10N2S3, the terminal thiophene rings are disordered. This disorder is of a flip-type and has been observed in some other thiophene derivatives. The molecule as a whole is approximately planar; the dihedral angle between the terminal five-membered rings is 6.0 (2)°. The crystal packing is determined by van der Waals interactions, π–π stair-like stacking between the thiophene rings, and some weak C—H⋯S and C—H⋯π short directional contacts.
Synthesis And Anticancer Evaluation Of Some New Unsymmetrical 3,5-Diaryl-4h-1,2,4-Triazole Derivatives, Olcay Beki̇rcan, Bahi̇tti̇n Kahveci̇, Murat Küçük
Synthesis And Anticancer Evaluation Of Some New Unsymmetrical 3,5-Diaryl-4h-1,2,4-Triazole Derivatives, Olcay Beki̇rcan, Bahi̇tti̇n Kahveci̇, Murat Küçük
Turkish Journal of Chemistry
A series of 4-arylidenamino-4H-1,2,4-triazole derivatives (3-11) were synthesized from the treatment of 4-amino-4H-1,2,4-triazoles (2) with certain aldehydes. Compounds 3-11 were reduced with NaBH_4 to afford the corresponding 4-arylmethylenamino-4H-1,2,4-triazoles (12-20). Compounds 1-10 and 12-19 were characterized by elemental analyses and ^1H NMR, ^{13}C NMR, IR and UV spectral data. Compounds 11 and 20 were characterized by ^1H NMR, ^{13}C NMR, IR and mass spectral data. Compounds 14, 16, 17, and 18 were tested for anticancer activities. Compound 17, chosen for its higher anticancer activity in the preliminary tests with the cancer cell lines of MCF7, NCI-H460, and SF-268, exhibited remarkable anticancer …
Efficient Dye Sensitized Solar Cells Based On A 2-Thiophen-2-Yl-Vinyl-Conjugated Ruthenium Photosensitizer And A Conjugated Polymer Hole Conductor, Attila Mozer, Y Wada, K-J Jiang, N Masaki, S Yanagida, Shogo Mori
Efficient Dye Sensitized Solar Cells Based On A 2-Thiophen-2-Yl-Vinyl-Conjugated Ruthenium Photosensitizer And A Conjugated Polymer Hole Conductor, Attila Mozer, Y Wada, K-J Jiang, N Masaki, S Yanagida, Shogo Mori
Australian Institute for Innovative Materials - Papers
Efficient dye-sensitized TiO2 solar cells based on a 2-thiophen-2-yl-vinyl-conjugated ruthenium photosensitizer and a conjugated polymer poly(3,4-ethylenedioxythiophene) have been fabricated. A maximum power conversion efficiency of 2.6% is achieved when the mesoporous TiO2 layer is 5–6 μm. The high fill factor (0.74), the open circuit voltage (0.78V), and the linear light intensity dependence of the short circuit current density (4.5mA cm−2 at 100 mW cm−2) make these devices promising for solid state photovoltaic applications.