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Pregled bibliografske jedinice broj: 892194

Časopis

Autori: Požar, Josip; Nikšić-Franjić, Ivana; Cvetnić, Marija; Leko, Katarina; Cindro, Nikola; Pičuljan, Katarina; Borilović, Ivana; Frkanec, Leo; Tomišić Vladislav
Naslov: Solvation Effect on Complexation of Alkali Metal Cations by a Calix[4]arene Ketone Derivative
( Solvation Effect on Complexation of Alkali Metal Cations by a Calix[4]arene Ketone Derivative )
Izvornik: The journal of physical chemistry. B (1520-6106) 121 (2017), 36; 8539-8550
Vrsta rada: članak
Ključne riječi: calix[4]arene ketone derivative, solvation effect, alkali metal cation complexation
( calix[4]arene ketone derivative, solvation effect, alkali metal cation complexation )
Sažetak:
The medium effect on the complexation of alkali metal cations with a calix[4]arene ketone derivative (L) was systematically examined in methanol, ethanol, N-methylformamide, N, N-dimethylformamide, dimethyl sulfoxide, and acetonitrile. In all solvents the binding of Na+ cation by L was rather efficient, whereas the complexation of other alkali metal cations was observed only in methanol and acetonitrile. Complexation reactions were enthalpically controlled, while ligand dissolution was endothermic in all cases. A notable influence of the solvent on NaL+ complex stability could be mainly attributed to the differences in complexation entropies. The higher NaL+ stability in comparison to complexes with other alkali metal cations in acetonitrile was predominantly due to a more favorable complexation enthalpy. The 1H NMR investigations revealed a relatively low affinity of the calixarene sodium complex for inclusion of the solvent molecule in the calixarene hydrophobic cavity, with the exception of acetonitrile. Differences in complex stabilities in the explored solvents, apart from N, N-dimethylformamide and acetonitrile, could be mostly explained by taking into account solely the cation and complex solvation. A considerable solvent effect on the complexation equilibria was proven to be due to an interesting interplay between the transfer enthalpies and entropies of the reactants and the complexes formed.
Projekt / tema: HRZZ-IP-2014-09-7309
Izvorni jezik: eng
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
MEDLINE
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Kemija
URL Internet adrese: http://pubs.acs.org/doi/abs/10.1021/acs.jpcb.7b05093
Broj citata:
Altmetric:
DOI: 10.1021/acs.jpcb.7b05093
URL cjelovitog teksta:
Google Scholar: Solvation Effect on Complexation of Alkali Metal Cations by a Calix[4]arene Ketone Derivative
Upisao u CROSBI: Katarina Leko (kleko@chem.pmf.hr:Katarina.Leko@chem.pmf.hr), 16. Ruj. 2017. u 13:10 sati



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