کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5223400 | 1383485 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Quantification of the push-pull character of azo dyes and a basis for their evaluation as potential nonlinear optical materials Quantification of the push-pull character of azo dyes and a basis for their evaluation as potential nonlinear optical materials](/preview/png/5223400.png)
The push-pull characters of a large series of donor-acceptor substituted azo dyes-71 structures in all-have been quantified by the NN double bond lengths, dNN, the 15N NMR chemical shift differences, Îδ15N, of the two nitrogen atoms and the quotient, Ïâ/Ï, of the occupations of the antibonding Ïâ, and bonding Ï orbitals of this partial NN double bond. The excellent correlation of the occupation quotients with the bond lengths strongly infers that both Ïâ/Ï and dNN are excellent parameters for quantifying charge alternation in the push-pull chromophore and the molecular hyperpolarizability, β0, of these compounds. By this approach, selected compounds can be appropriately considered as viable candidates for nonlinear optical (NLO) applications.
Journal: Tetrahedron - Volume 66, Issue 25, 19 June 2010, Pages 4503-4509