Provectus' intellectual property (IP) includes a family of US and international patents that protect the process by which pharmaceutical grade RB and related
xanthenes are produced, reducing the formation of previously unknown transhalogenated impurities that exist in commercial grade RB in uncontrolled amounts.
The different types of aggregation between rosamines once anchored to the Ti[O.sub.2] molecules in the film and their implications on their respective spectra can be explained in terms of the type of interaction between rosamine and Ti[O.sub.2], taking into account that the transition dipole moments for both rosamines are located along the
xanthene ring.
In order to understand the mechanisms involved in PDT, so that more effective photosensitizers can be developed, some synthetic
xanthene dyes have been considered.
El-Khaiary, "Quantum chemical investigation and statistical analysis of the relationship between corrosion inhibition efficiency and molecular structure of
xanthene and its derivatives on mild steel in sulphuric acid," Journal of Molecular Structure, vol.
[18] in the description of singlet oxygen generation photosensitized by
xanthene dyes, many researchers have reviewed the subject for new applications of these dyes, being a topic of current interest [19-26].
The unprecedented [Ru(bpy)3]2+ complexes as well as
xanthene based organic dyes has gained widespread recognition due to their effectiveness and broad applications in organic synthesis.
The manufacturer said the products were made using an additive called
xanthene gum from Danisco.
Rhodamine B, a highly soluble
xanthene dye has found great use in various dye utilizing industry because of their easy wet fastness.
The nature of electron withdrawing or donating substituent on the aromatic ring did not show any significant difference in the yield of
xanthene derivatives.
They are: Erythrosin included in the class of
xanthene dyes; Blue indigotine included in the indigotin class of dyes, Patent Blue V, Fast Green and Brilliant Blue in class of triphenylmethane dyes, Bordeaux Red, Ponceau 4R, Red 40, Azorubine, Tartrazine Yellow and Sunset Yellow, included in the class of azo dyes (POLONIO; PERES, 2009).