Phosphorescence of polynuclear aromatic hydrocarbons in heptakis(6-bromo-6-deoxy-β-cylcodextrin) was written by Femia, R. A.;Love, L. J. Cline. And the article was included in Journal of Physical Chemistry in 1985.Name: Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin This article mentions the following:
Room-temperature phosphorescence spectra and excited-state lifetimes are reported for several polynuclear aromatic hydrocarbons included within the cavity of heptakis(6-bromo-6-deoxy-β-cyclodextrin) (Br-β-CD) (synthesized by replacing β-CD’s primary hydroxyls with Br). Appreciable phosphorescence only occurs when the lumiphor is shielded from quenchers by the cyclodextrin torus and are within the realm of influence of heavy atoms. By locking the heavy atom into a fixed position on the cyclodextrin mol., the observed phosphorescence and dynamic interactions depend primarily on the entrance and exit rate constants of the lumiphor from the cyclodextrin, simplifying the kinetic scheme and data interpretation. A solvent mixture of DMF and water was employed due to the extreme water insolubility of heptakis(6-bromo-6-deoxy-β-cyclodextrin), and to assess the degree of bulk solvent hydrophobicity on the inclusion process. This latter effect was monitored by differences in phenanthrene’s Br-β-CD spectral profile relative to that in aqueous unbrominated β-CD/1,2-dibromoethane and fluorescence peak ratio variations as a function of the DMF/water ratio. Luminescence lifetime values provided indirect information on the relative exit-to-entrance rate constant ratios. The optimum DMF/water ratio for production of maximum phosphorescence intensity was 4/1, and the optimum concentration of brominated β-cyclodextrin in the 4/1 DMF/water solvent was 0.01 M. In the experiment, the researchers used many compounds, for example, Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1Name: 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.Name: Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary