Time-dependent density functional theory (TD-DFT) was employed to calculate the UV/vis spectra for three of the triphenylamine (TPA)-donor dyes, TC1, L1, and LJ1, in isolation as well as when complexed with a titania nanoparticle. TPA-donor dyes are a class of promising organic dyes for use in dye-sensitized solar cells (DSSCs). The three dyes studied here are among the smallest of these molecu...

Abstract Synthetic organic colourants are extremely prominent in heritage collections, particularly throughout textiles. They often generalized as highly light-sensitive; although, a broad distribution of lightfastness exists. This is evident various fastness ratings published late nineteenth century literature, the work Schultz and Julius, Colour Index. In conservation, much research related t...

Fluorescent particles have broad applications in tagging, tracing, and labeling. Fluorescence is typically generated through incorporation of either inorganic or organic fluorescent dyes into the particle s material. While inorganic dyes are typically more stable, their number and compatibility is rather restricted. The large variety of organic dyes makes them attractive for creating fluorescen...

Changes in the visible absorption spectra of dyes due to binding with polyelectrolytes of high molecular weight are known as metachromasy and have been extensively studied. Recent advances in metachromasy have been summarized in several reviews (1-3). It is also known that metachromasy due to binding with proteins is generally weak but oc curs with both acidic and basic dyes. Methyl orange (MO)...