Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.1: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

Effect of Medium Acidity and Photostability of 3-(4-Dimethylamino-phenyl)-1-(2,5-dimethyl-thiophen-3-yl)-propenone DDTP): A New Green Emitting Laser Dye — •Khalid Alamry, Abdullah Asiri, Salman Khan, Samy El-Daly, and Mahmoud Hussein — Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia

On the line of a previous work on the spectral properties of some of heteroaryl chalcone, the effect of medium acidity and photoreactivity of 3-(4-dimethylamino-phenyl)-1-(2,5-dimethyl-thiophen-3-yl)-propenone (DDTP) has been investigated in dimethylformamide and in chloromethane solvents such as methylenechloride, chloroform and carbon tetrachloride. The dye solution (ca. 5*10*4 mol*L*1 in DMF) gives a good laser emission in the range 470*560 nm with emission maximum at 515 nm upon pumping by nitrogen laser (λex*337.1 nm). The laser parameters such as gain coefficient (α), emission cross section (σe) and half life energy (E1/2) at maximum laser emissionare also determined.