Results 71 to 80 of about 10,994 (228)

Aggregation-induced emission effect on turn-off fluorescent switching of a photochromic diarylethene

Beilstein Journal of Organic Chemistry, 2019
Background: Diarylethenes are well-known photochromic compounds, which undergo cyclization and cycloreversion reactions between open- and closed-ring isomers.
Luna Kono, Yuma Nakagawa, Ayako Fujimoto, Ryo Nishimura, Yohei Hattori, Toshiki Mutai, Nobuhiro Yasuda, Kenichi Koizumi, Satoshi Yokojima, Shinichiro Nakamura, Kingo Uchida   +10 more
doaj   +1 more source

DNA Oxidation Photoinduced by Norharmane Rhenium(I) Polypyridyl Complexes: Effect of the Bidentate N,N′-Ligands on the Damage Profile [PDF]

, 2018
ReI-polypyridyl complexes have interesting and distinctive photochemical and photosensitizing properties. This work describes the capability to induce (or photoinduce) DNA damage of three ReI-complexes with a naturally occurring alkaloid called ...
Ahmad, Balasingham, Balón, Blasius, Boerner, Boiteux, Bonett, Cao, Coggan, Copeland, Crespy, Daley, de Souza, Dhar, Dong, Epe, Epe, Erkkila, Etienne, Feliz, Fernández-Moreira, Friedman, Gasser, Ghesquière, Gonzalez, Gonzalez, Gonzalez, Gonzalez, Gonzalez, Gonzalez, Hayashi, Häring, Kaplanis, Kastl, Kaulage, Knopf, Krokan, Kumar, Kydonaki, Lakowicz, Lee, Leonidova, Lhiaubet-Vallet, Lo, Maisuls, Maisuls, Maisuls, Mari, Marker, Maron, Martí, McKenzie, McKinley, Müller, Ng, Niesel, Paul, Pohl, Pyle, Ragone, Rasse-Suriani, Ruiz, Ruiz, Ruiz, Salditt, Schatzschneider, Schmidt, Schutte, Schäfer, Shahabadi, Smith, Song, Stemp, Stoeffler, Sun, Taira, Thornton, Vignoni, Wilson, Wolfe, Zeglis, Ziessel, Zobi   +82 more
core   +1 more source

Synthesis of a π‐Extended Phenazine Diimide Derivative and Characterization of Its Closed‐Shell Reduced States

Chemistry – A European Journal, EarlyView.
In this work, the synthesis and characterization of novel π‐extended phenazine diimides is reported. The derivatives undergo differential reduction to a dihydrophenazine or Meisenheimer form depending on the reaction conditions employed. The outcome of this work highlights the paramount importance of structural design in determining the nature of the ...
Francesco Rigodanza, Beatrice Bartolomei, Ilaria Crea, Paolo Costa, Nicola Demitri, Marcella Bonchio, Maurizio Prato, Jacopo Dosso   +7 more
wiley   +1 more source

Fluorescence and photostability studies of anthracene-9-carboxylic acid in different media

International Journal of Photoenergy, 2000
Electronic absorption and fluorescence spectra of anthracene-9-carboxylic acid (ANCA) were studied in different homogeneous solvents, binary protic/aprotic solvent mixtures and in heterogeneous solutions of the cationic cetyltrimethyl ammonium bromide ...
M. S. A. Abdel-Mottaleb, H. R. Galal, A. F. M. Dessouky, M. El-Naggar, D. Mekkawi, S. S. Ali, G. M. Attya   +6 more
doaj   +1 more source

On the properties of a single OPLS-UA model curcumin molecule in water, methanol and dimethyl sulfoxide. Molecular dynamics computer simulation results [PDF]

, 2017
The properties of model solutions consisting of a solute --- single curcumin molecule in water, methanol and dimethyl sulfoxide solvents have been studied using molecular dynamics (MD) computer simulations in the isobaric-isothermal ensemble.
Ilnytskyi, J. M., Patsahan, T., Pizio, O.   +2 more
core   +2 more sources

Room‐Temperature Helix‐to‐Disc Conversion of Thia[6]helicene S,S‐Dioxides to Coronene via In Situ Phenoxide Anion Generation

Chemistry – A European Journal, EarlyView.
In situ phenoxide formation at the benzene terminus triggers room‐temperature conversion of thia[6]helicene S,S‐dioxides to coronene. The solubility contrast drives product precipitation, enabling isolation by simple filtration. This pericyclic annulation between the helical termini provides direct access to coronene‐type planar architectures ...
Kaito Seino, Takashi Murase
wiley   +1 more source

Exploring the emissive properties of new azacrown compounds bearing aryl, furyl or thienyl moieties: a special case of chelation enhancement of fluorescence upon interaction with Ca2+, Cu2+ or Ni2+ [PDF]

, 2010
Three new compounds bearing furyl, aryl or thienyl moieties linked to an imidazo-crown ether system (1, 2 and 3) were synthesized and fully characterized by elemental analysis, infrared, absorption and emission spectroscopy, X-ray crystal diffraction ...
Baptista, Rosa M. F., Costa, Susana P. G., Lodeiro, Carlos, Oliveira, Elisabete, Raposo, M. Manuela M.   +4 more
core   +1 more source

Amine‐Triggered Azabenz‐Annulation of Cyclic Secondary Amine‐Functionalized Perylene Diimides for Dual‐Mode Sensing

Chemistry – A European Journal, EarlyView.
Pictet‐Spengler Intermediate of a cyclic secondary amine perylene diimide undergoing amine‐triggered conversion to azabenz‐annulated perylene diimide, inducing a high‐contrast green‐to‐yellow color change along with fluorescence turn‐on, demonstrating intuitive “safe” to “warning” dual‐mode sensing.
Irene E. Park, Alejandro J. Cuellar de Lucio, Gregory C. Welch   +2 more
wiley   +1 more source

Preferential Solvation of a Dipolar Solute in Mixed Binary Solvent. A Study by UV-Visible Spectroscopy [PDF]

, 2009
Solvation characteristics of p-nitroaniline have been studied in completely miscible binary solvent mixtures, namely, ethanol + dichloromethane (I), ethanol + hexane (II) and butanol + dioxane (III), by monitoring the solvatochromic absorption band.
Mahanta, Saroj
core  

Electroanalysis of neutral precursors in protic ionic liquids and synthesis of high-ionicity ionic liquids [PDF]

, 2017
Protic ionic liquids (PILs) are ionic liquids that are formed by transferring protons from Brønsted acids to Brønsted bases. While they nominally consist entirely of ions, PILs can often behave as though they contain a significant amount of neutral ...
Daniel, Smith, Jones, Robert, Joshua, Gibson, Sean, Goodwin, Walsh, Darren A.   +4 more
core   +2 more sources