Micrometer-scale patterns of eosin and dansyl dyes on hyperbranched poly(acrylic acid) (PAA) organic thin films have been prepared using a combination of photoacid-based lithography and covalent grafting of dye molecules. Reflection infrared spectroscopy, optical microscopy, and fluorescence microscopy indicate that the dyes were attached within the intended regions. Patterned dye features havi...

Theoretical analysis of the 2,1,3-Benzoxadiazole-5-carboxylic acid dye molecule and new designed dyes were performed using Density Functional Theory. The ground state and excited state oxidation potential as well as electron injection from dyes to TiO2 are reported. Improved light harvesting efficiency and free energy change of electron injection of new designed sensitizers reveal that these ma...

Nucleophilic addition of phosphinic acid, phosphites, sodium dialkyl phosphites, phosphoramidites, phosphinites, and phosphonites to highly polarized or cationic fluorophores, followed by oxidation, results in new "PONy" dyes with auxochromic phosphinate, phosphonate, or phosphonamidate groups. The reaction was applied to a wide variety of coumarins, (thio)pyronins, and N-alkylacridinium and 5,...

The synthesis of light-harvesting arrays requires modular pigment building blocks. Boron-dipyrromethene dyes are well-suited for the photochemical sensitization of free base or metalloporphyrins. Direct access to borondipyrromethene dyes bearing reactive substituents is provided by a simple synthetic route involving two one-flask reactions. Reaction of pyrrole or 2-methylpyrrole with an aldehyd...

A model system was established which could serve for the quick and reliable estimation of the possibility to use aromatic dyes in staining elastic fibers and lamellas. Specially prepared samples of aorta wall tissue (taken from the corpse material of a healthy male, aged 31) and model proteins (collagen and elastin) were stained with acid diazo-dyes applied in water solution, 70% ethanol and di...

The ability of four different species of white rot fungi viz., Coriolus versicolor, Termetomyces sp, Pleurotus ostreatus and Schizophyllum commune to remove Azo dyes from aqueous solutions were evaluated in batch culture under laboratory conditions. C. versicolor was found to be the most efficient colour removing species for the three dyes investigated. Maximum removal capacity of C. versicolor...

Many high-throughput ion channel assays require the use of voltage-sensitive dyes to detect channel activity in the presence of test compounds. Dye systems employing Förster resonance energy transfer (FRET) between 2 membrane-bound dyes are advantageous in combining high sensitivity, relatively fast response, and ratiometric output. The most widely used FRET voltage dye system employs a coumari...

Near-infrared (NIR) organic dyes have become important for many biomedical applications, including in vivo optical imaging. Conjugation of NIR fluorescent dyes to photosensitizing molecules (photosensitizers) holds strong potential for NIR fluorescence image guided photodynamic therapy (PDT) of cancer. Therefore, we were interested in investigating the photophysical properties, in vivo tumor-af...

Abstract In recent years, there has been an interest in the study of new methods for removal dyes from water due to its large-scale use different industries, example, paper printing, textile, leather, pharmaceutical, food or technological applications. It is estimated that more than 700 thousand tons about 10 000 types are produced annually. Most them synthetic origin and can generate adverse e...