909121-52-4Relevant academic research and scientific papers
High Stokes shift perylene dyes for luminescent solar concentrators
Sanguineti, Alessandro,Sassi, Mauro,Turrisi, Riccardo,Ruffo, Riccardo,Vaccaro, Gianfranco,Meinardi, Francesco,Beverina, Luca
, p. 1618 - 1620 (2013)
Highly efficient plastic based single layer Luminescent Solar Concentrators (LSCs) require the design of luminophores having complete spectral separation between absorption and emission spectra (large Stokes shift). We describe the design, synthesis and characterization of a new perylene dye possessing Stokes shift as high as 300 meV, fluorescent quantum yield in the LSC slab of 70% and high chemical and photochemical stability. The Royal Society of Chemistry 2013.
Photophysical and electrochemical properties of thienylnaphthalimide dyes with excellent photostability
Inari, Takatoshi,Yamano, Minori,Hirano, Ayaka,Sugawa, Kosuke,Otsuki, Joe
, p. 5178 - 5188 (2014/08/05)
The development of robust dyes is a highly important theme for any applications of dyes. Here we present photophysical and electrochemical characterization of a set of robust dyes based on the thienylnaphthalimide unit. The set is comprised of the thienylnaphthalimide derivatives with phenyl- (Ph-), 4-nitrophenyl- (NO2Ph-), and 4-(diphenylamino)phenyl (Ph 2NPh-) substituents as exemplars covering electron-withdrawing to electron-donating groups. The fluorescence quantum yields of the Ph-TNI increases as the solvent polarity increases, while that of Ph2NPh-TNI showed the opposite trend. Changes in the rates of nonradiative decay were found to be a major factor for these contrasting behaviors. Cyclic voltammetry showed that the substituent effects were more apparent for the HOMO energies rather than the LUMO energies. Density functional theory calculations showed that the first singlet excited state of these compounds is a 1π,π* state with a significant charge transfer character. Ph-TNI and Ph2NPh-TNI are much more stable against photodegradation than coumarin and fluorescein dyes.
Mapping the influence of molecular structure on rates of electron transfer using direct measurements of the electron spin-spin exchange interaction
Lukas, Aaron S.,Bushard, Patrick J.,Weiss, Emily A.,Wasielewski, Michael R.
, p. 3921 - 3930 (2007/10/03)
The spin-spin exchange interaction, 2J, in a radical ion pair produced by a photoinduced electron transfer reaction can provide a direct measure of the electronic coupling matrix element, V, for the subsequent charge recombination reaction. We have develo
