| Autor: |
Ren Q; Department of Chemistry, University of Wisconsin-Stevens Point, 2001 Fourth Avenue, Stevens Point, Wisconsin 54481, USA., Reedy CG, Terrell EA, Wieting JM, Wagie RW, Asplin JP, Doyle LM, Long SJ, Everard MT, Sauer JS, Baumgart CE, D'Acchioli JS, Bowling NP |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of organic chemistry [J Org Chem] 2012 Mar 02; Vol. 77 (5), pp. 2571-7. Date of Electronic Publication: 2012 Feb 14. |
| DOI: |
10.1021/jo300034h |
| Abstrakt: |
The effective conjugation of ortho and ortho-alt-para-arylene ethynylenes, with appropriately positioned pyridine and pyrazine heterocycles, increases upon binding to Ag(I) and Pd(II) cations. Significant bathochromic shifts in the electronic spectra, witnessed upon introduction of these metal bridges, are consistent with enhanced electron delocalization in the unsaturated backbone. Control studies suggest that this electronic behavior is attributable exclusively (in the case of Ag(I)) or partially (in the case of Pd(II)) to conformational restrictions of the conjugated backbones. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
