Electric Field-Assisted Alignment of Self-Assembled Fibers Composed of Hydrogen-Bonded Molecules Having Laterally Fluorinated Mesogens was written by Yoshio, Masafumi;Shoji, Yoshiko;Tochigi, Yusuke;Nishikawa, Yohei;Kato, Takashi. And the article was included in Journal of the American Chemical Society in 2009.Reference of 954-81-4 This article mentions the following:
Aligned fibrous aggregates of amide compounds having laterally fluorinated aromatic mesogens have been successfully obtained by the application of the a.c. elec. field (1.0 V/μm, 1 kHz) in dodecylbenzene. In contrast, randomly entangled fibers are formed in the solvent without elec. fields. For the analogous compounds without fluorine substituent, no aligned fibrous aggregates have been obtained under the elec. fields. The elec. field alignment of the fibers should be assisted by the fluorinated rod-shaped mesogens that exhibit neg. dielec. anisotropy. In the experiment, the researchers used many compounds, for example, N-(5-Bromopentyl)phthalimide (cas: 954-81-4Reference of 954-81-4).
N-(5-Bromopentyl)phthalimide (cas: 954-81-4) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbonbromine bond is electrophilic in nature. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Reference of 954-81-4
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary