- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Studying the viscosity effect on excited dimer formation of (2-Methylnaphthalene) | ||
| Journal of College of Education | ||
| Article 1, Volume 0, Issue 6, 2017, Pages 163-184 | ||
| Abstract | ||
| The excimer fluorescence spectra of (2-methylnaphthalene) solution which dissolved in hexane & paraffin as a function of concentration at excitation wavelength (λex= 270nm) was measured & investigated at room-temperature. The quantum yield of monomer & excimer fluorescence ΦFM & ΦFD were calculated from the area under the monomer & excimer fluorescence spectra which is corrected from self-absorption effect. The (half-value) concentration [M]h was measure which is equal to ([M]h= 1.11 mol) for (2MN) in hexane, while (2MN) in paraffin the half-value concentration equal to ([M]h= 1.05), this difference because of solvent viscosity. Other molecular parameter were measured like the molar excimer/monomer fluorescence yield (K), Stern-Volmer (KSV) coefficient & excimer quantum efficiency (qFD) which is equal to (qFD= 0.38) for (2MN) in hexane. (qFD = 0.45) for (2MN) in paraffin. The excimer quantum efficiency is increase with increase viscosity, the rate parameter of excimer formation KDM [M] is inversely proportional to viscosity. | ||
|
Statistics Article View: 59 PDF Download: 2 |
||