Mixed monolayers of amphiphilic cyclodextrins and phospholipids. I. Miscibility under dynamic conditions of compression was written by Kasselouri, Athena;Coleman, Anthony William;Baszkin, Adam. And the article was included in Journal of Colloid and Interface Science in 1996.Quality Control of Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin This article mentions the following:
The miscibility of per-(6-amino-2,3-di-O-hexyl) β-CD hydrochloride salt (NH3-β-CD-OC6) with 1,2-dipalmitoyl,3-sn-phosphatidyl choline (DPPC) and 1,2 dipalmitoyl,3-sn-phosphatidic acid (DPPA) and of per-(6-dodecanoylamino-6-deoxy) β-CD (C11CONH-β-CD) with DPPC was assessed by surface pressure-area experiments under dynamic conditions. The determination of their mixing behavior was approached by thermodn. characterization derived from a comparison of the composition dependence of collapse pressure for various contents of 2 components in monolayers with that predicted from a model of ideal mixing. Component miscibility has addnl. been addressed by the use of the J. Smaby-H. Brockman (1992) state equation for liquid-expanded monolayers which characterizes interaction between monolayer components by using the H2O activity coefficient While for both NH3-β-CD-OC6-DPPC and NH3-β-CD-OC6-DPPA systems, the average surface areas followed the additivity rule, for the latter system, surface pressures at collapse deviated significantly from ideality. The occurrence of an interaction at the level of oppositely charged polar groups of NH3-β-CD-OC6 and DPPA was also demonstrated by the nonideal composition dependence of the H2O activity coefficient (f1) characterizing the interfacial H2O. The mixing energies and interaction parameters at collapse pressures were calculated by using the P. Joos et al. (1969) approach. Pos. values of these factors indicate that NH3-β-CD-OC6 and DPPA mixed films are less stable thermodynamically than are films in which ideal mixing of components occurs. The mixing of NH3-β-CD-OC6 with DPPC appears to be almost ideal. In the case of the C11CONH-β-CD-DPPC system, anal. according to both the Joos and F. Goodrich (1957) approaches shows the occurrence of an important interaction which results in neg. mixing energies characteristic of thermodynamically stable mixed films. In the experiment, the researchers used many compounds, for example, Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1Quality Control of Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin).
Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Quality Control of Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary