Characterization and spectral study of 1,4-dimethylquinoxaline-2,3-dione potassium iodide complex

Bouziane Benali (1) , Zhor Lazar (1) , A. Boucetta (1) , A. El Assyry (1) , Brahim Lakhrissi (2) , M. Massoui (2) , Chakir Jarmoumi (2) , Philippe Négrier (3) , Jean-Michel Léger (4) , Denise Mondieig (3)

1 Laboratoire d'Opto-électronique et de Physico-Chimie des Matériaux
2 Laboratoire de Chimie d'Agroressources et Génie des Procédés
3 CPMOH - Centre de physique moléculaire optique et hertzienne
4 Laboratoire de Pharmacochimie

1,4-Dimethylquinoxaline-2,3-dione potassium iodide complex was prepared, and its structure was determined by single crystal X-ray diffraction. Elsewhere, solvent effects on the energy of excited and ground states of the complex in solution have been investigated by absorption and fluorescence spectroscopy. The change displayed by the photophysical properties of this complex in different solvents can be explained in terms of a sum of dielectric and hydrogen bonding effects taking part in the stabilization or destabilization of the structure.

Mots clés: 4‐dimethylquinoxaline‐2; 3‐dione potassium iodide complex; dipole-dipole and hydrogen bond interactions; electronic absorption; fluorescence; single crystal structure; synthesis

Bouziane Benali, Zhor Lazar, A. Boucetta, A. El Assyry, Brahim Lakhrissi, et al.. Characterization and spectral study of 1,4-dimethylquinoxaline-2,3-dione potassium iodide complex. Spectroscopy Letters : An International Journal for Rapid Communication, 2008, 41 (2), pp.64-71. ⟨10.1080/00387010801943525⟩. ⟨hal-00719449⟩