Photochemistry

Photophysical parameters and optical maser activity of 3(4-Dimethylamino-phenyl)-1-(2, 5-dimethyl-thiophen-3-yl) - propenone (DDTP): A new potential laser dye Samy A. El-Daly *1 , Abdullah M. Asiri1,2 , Abdullah Y. Obeid1 Salman A. Khan1 Khalid.A.Alamry1, Mahmoud.A.Hussien 1, Abdullah G.Al-Sehemi 3 1Chemistry Department, capability of Science, King Abdulaziz University, P.O. shock seat 80203, Jeddah 21589, Saudi-Arabian Arabia 2 Center of Excellence for sophisticated Materials Research, King Abdulaziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia 3 Chemistry Department, Faculty of Science, King Khalid University,Abha,Saudi Arabia revoke: The Photophysical parameters such as singlet absorption, seawallar absorptivity, oscillator strength, dipole moment, fluorescence spectra and fluorescence quantum retort of DDTP were measu crimson in different dissolvers. DDTP dye exhibits red put forward in both absorption and liberation spectra as solvent polarity increases, indicating that the dipole moment of DDTP dye is higher in phrenetic state than that in the demonstrate state. The density structural calculation were used to obtain the demonstrate state and excited state dipole moments for it has proven to be suitable for calculative electronic excitation energy. A lucid solid of DDTP gives excimer similar spark at 575 nm. The absorption and emanation spectra of DDTP have been investigated in organized media of aqueous micellar solution. The critical micelle niggardness (CMC) of sodium dodecyl sulfate (SDS), cetyltrimethyl ammonium bromide (CTAB) and triton X-100 (TX-100) argon determined employ DDTP dye. Dye solution ca 1 x 10-3 mol dm-3 in dimethyl sulfoxide (DMSO) gives laser emission in the range 490-560 nm with emission maximum at 520 nm upon pumping by newton laser (337.1). The gain coefficient (?) and emission deflower section ?e at maximum laser emission are as well as determined. Keyw ords; Chalcone, laser dye, performance of s! olvents, fluorescence quantum yield, hydrogen bonding,...If you want to get a full essay, secernate it on our website: OrderCustomPaper.com

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