Grunwald, Marco Andre published the artcileMesomorphic properties of cyanobiphenyl dimers with a substituted central malonate unit: overruling effect of fluorination, Formula: C6H13I, the publication is Liquid Crystals (2022), 49(10), 1347-1358, database is CAplus.
Two series of C2-substituted dimers carrying a central C2-hexyl- or C2-nonafluorohexyl malonate and two cyanobiphenyls attached via alkoxy spacers of various lengths I [R = hexyl, nonafluorohexyl; n = 6, 7, 8, etc.] were synthesized, and the mesomorphic properties were studied by differential scanning calorimetry, polarising optical microscopyand X-ray diffraction (wide-angle and small-angle X-ray scattering). The C2-substituent dimers together with the spacer lengths had a pronounced influence on the phase behavior. In case of C2-hexyl-substituted dimers, shorter spacers favored N phases (n = 6-9), while longer spacers favored SmA phases (n â?9). In addition, decreased clearing temperatures were observed In contrast, C2-nonafluorohexyl-substituted dimers suppressed N phases and displayed only SmA phases. Moreover, clearing temperatures and phase stabilities considerably increased. Based on the exptl. determined layer thickness, a packing model for the SmA phases was proposed, where C2-substituted dimers displaced mesophases with mols. in a Y-conformation. As a result, less stable mesophases for C2-hexyl-substituted dimers due to weakened intermol. interactions and more stable mesophases for C2-nonafluorohexyl-substituted dimers due to the fluorophobic effect and nanosegregation were obtained.
Liquid Crystals published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Formula: C6H13I.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com