Lyotropic mesomorphism in benzopurpurin 4B-solvent systemстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 декабря 2016 г.
Аннотация:The results of studying chromonic mesomorphism in benzopurpurin 4B (BP-4B)-water, BP-4B-water-electrolyte (NaCl or KCl), and BP-4B-water-N,N-dimethylformamide (DMF) or formamide (FA) systems are presented. Mesophases are identified using polarization-optical microscopy and the responses of samples to disturbances induced by magnetic field and mechanical deformation. It is shown that, in water and aqueous electrolyte solutions, at BP-4B concentrations of below 0.5 and 1.5 wt %, respectively, an instable nematic mesophase is formed, which is rapidly transformed into an anisotropic gel. In this case, the formation of the nematic mesophase is preceded by the appearance of tactoids. At some concentrations of organic solvents, nematic mesophases, which are stable for a time period of longer than 2 months, are formed in BP-4B-water-DMF (BP-4B concentrations of 1.0 and 1.5 wt %) and BP-4B-water-FA (BP-4B concentration of 1.0 wt %) systems.