A non-chiral ferroelectric nematic compound with a 1,3-dioxane unit in the mesogenic core called 2,3?,4?,5?-tetrafluoro-[1,1?-biphenyl]-4-yl 2,6-difluoro-4-(5-propyl-1,3-dioxan-2-yl) benzoate (DIO) was studied by dielectric spectroscopy frequency range 0.1 Hz–10 MHz over wide of temperatures. The exhibits three phases on cooling from isotropic phase, i.e., ordinary paraelectric N; intermediate ...

Tungstophosphoric acid (H3PW12O40) supported on silica-coated magnetite nanoparticles has been prepared and used as a heterogeneous catalyst (Fe3O4@SiO2@HPW) in the condensation of benzaldehyde (B) with glycerol (Gly) for production cyclic acetals. Physicochemical techniques, including scanning electron microscopy (SEM), transmission (TEM), Fourier-transform infrared spectrometry (FTIR), X-ray ...

Polymer blends of hydroXYpl"Opyl cenul~ (HPC) and organ~lv lignin (OSL) were prepared by mixing in solutions of both pyridine and dioxane, and casting 88 fibD8, and by mixing in the melt followed by extrusioo. All preparations exhibited partial miscibility 88 evidmced by a aingle T. up to a compositioo of 40 wt % lignin above which phase aeparatioo was detected. Dioxan~t and injectioo-molded bl...

The action of the N1, N1, N3, N3-tetramethylguanidinium salts of a number of oximes on 5'-O-methoxytetrahydropyranylthymidylyl-(3' leads to 5')-3'-O-methoxytetrahydropyranylthmidine aryl esters (7a-c) in dioxan-water (1:1 v/v) has been investigated. The O-chlorophenyl ester (7a) was unblocked by 4-nitrobenzaldoximate ion ca. 2.5 times as rapidly as the p-chlorophenyl ester (7b) and ca. 25 times...