کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402765 | 1392741 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of substituents in the Nâ§N ligand on the emission wavelength of Cu(I) complexes: Insight from experimental and theoretical approach
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Three mononuclear Cu(I) complexes [Cu(bop)(PPh3)2][BF4], [Cu(fop)(PPh3)2][BF4] and [Cu (pop)(PPh3)2][BF4] were synthesized, where 2-(5-tert-butyl-1,3,4-oxadiazol-2-yl)pyridine (bop), 2-(5-(trifluoromethyl)-1,3,4-oxadiazol-2-yl)pyridine (fop) or 2-(5-phenyl-1,3,4-oxadiazol-2-yl)pyridine (pop) was used as Nâ§N chelate ligand and triphenylphosphine was used as ancillary ligand. Several substituents with different electronic effects, such as tert-butyl (t-Bu), trifluoromethyl (CF3) and phenyl (Ph) groups, were introduced into the 1,3,4-oxadiazole moiety of the Nâ§N chelate ligands. The photophysical properties of the complexes were examined by UV-vis absorption and photoluminescence (PL) spectroscopies. The complex [Cu(fop)(PPh3)2][BF4] with a CF3 group in the Nâ§N chelate ligand exhibited the lowest energy absorption and emission band. Electrochemical analyses combined with density functional theory (DFT) calculations established that the introduction of electron withdrawing group (CF3) decreases the HOMO-LUMO energy gap, and the introduction of electron donating group (t-Bu) into the 1,3,4-oxadiazole moiety has a similar effect on the emission wavelength as that of the introduction of a phenyl group with a Ï-conjugation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 130, Issue 6, June 2010, Pages 976-980
Journal: Journal of Luminescence - Volume 130, Issue 6, June 2010, Pages 976-980
نویسندگان
Guanghui Zhang, Xiaodong Li, Xiaoqing Jiang, Peipei Sun,