Effect of Ethynyl and 2-Thienyl Substituents on the Complexation of 4'- Substituted 2,2':6',2''-Terpyridines with Zn2+ and Fe2+ Ions, and the Spectroscopic Properties of the Ligands and Formed Complex Species

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F12%3A10123482" target="_blank" >RIV/00216208:11310/12:10123482 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/ejic.201200256" target="_blank" >http://dx.doi.org/10.1002/ejic.201200256</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/ejic.201200256" target="_blank" >10.1002/ejic.201200256</a>

Result language
angličtina
Original language name
Effect of Ethynyl and 2-Thienyl Substituents on the Complexation of 4'- Substituted 2,2':6',2''-Terpyridines with Zn2+ and Fe2+ Ions, and the Spectroscopic Properties of the Ligands and Formed Complex Species
Original language description
The complexation of terpyridine (tpy) and its 4'-ethynyl (E) and 4'-(2-thienyl) (T) derivatives, as promising chelate end groups for oligomeric components of conjugated metallosupramolecular polymers, with Zn2+ and Fe2+ ions as ion couplers was investigated in acetonitrile using NMR and UV/ Vis spectroscopy. The binding of these ligands with Zn2+ ions shows two distinct steps with comparable binding constants in the range of 106 dm3mol-1, whereas their binding with Fe2+ ions shows a strong tendency to form [FeL2]2+ species, which almost do not dissociate to monoligand species [FeL]2+ even at a twofold excess of Fe2+ ions. The ligand exchangedynamics between [ZnL2]2+ species in solution was studied by NMR spectroscopy and the related parameters were determined. UV/Vis spectra taken during complexation show an apparent isosbestic point at 310+-10 nm, and those of the systems with Fe2+ ions also show a metal-to-ligand chargetransfer band at 550-580 nm. 4'-Substituents strongly enhance the
Czech name
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Czech description
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Project
<a href="/en/project/GAP108%2F12%2F1143" target="_blank" >GAP108/12/1143: Polyelectrolytic conjugated dynamers: preparation, constitutional dynamics and functional properties of new materials</a>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP) Z - Vyzkumny zamer (s odkazem do CEZ) S - Specificky vyzkum na vysokych skolach I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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