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Pregled bibliografske jedinice broj: 82640

Časopis

Autori: Tomišić, Vladislav; Galić, Nives; Bertoša, Branimir; Frkanec, Leo; Simeon, Vladimir; Žinić, Mladen
Naslov: Hydrogen Bonding and Solvent Effects on Complexation of Alkali Metal Cations by Lower Rim Calix[4]arene Tetra(O-[N-acetyl-D-phenylglycine methyl ester]) Derivative
Izvornik: Journal of inclusion phenomena and macrocyclic chemistry (0923-0750) 53 (2005), 3; 263-268
Vrsta rada: članak
Ključne riječi: alkali cations; calixarenes; complexation; hydrogen bonds; solvent effects; stability constants
Sažetak:
Complexation of alkali metal cations with 5, 11, 17, 23-tetra-tert-butyl-26, 28, 25, 27-tetrakis(O-methyl-D-alpha-phenylglycylcarbonylmethoxy)calix[4]arene (L) was studied by means of spectrophotometric, conductometric and potentiometric titrations at 25 °C. The solvent effect on the binding ability of L was examined by using two solvents with different affinities for hydrogen bonding, viz. methanol and acetonitrile. The complex stabilities in methanol were significantly lower. That could be explained by different solvation of the cations and by competition between the cations and methanol molecules (via hydrogen bonds) for amide carbonyl oxygens. The influence of cation solvation on complex stability was most pronounced in the case of Li+ for which, contrary to the quite stable LiL+ complex in acetonitrile, no complexation was observed in methanol under the conditions used.
Projekt / tema: 0098053, 0119641, 0119620
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
SCI-EXP, SSCI i/ili A&HCI
Kategorija: Znanstveni
Znanstvena područja:
Kemija
URL Internet adrese: http://springerlink.metapress.com/(k3dw4qrl0jro31ys5u2yoyzh)/app/home/contribution.asp?referrer=parent&backto=issue,18,24;journal,2,69;linkingpublicationresults,1:102936,1
URL cjelovitog teksta:
Google Scholar: Hydrogen Bonding and Solvent Effects on Complexation of Alkali Metal Cations by Lower Rim Calix[4]arene Tetra(O-[N-acetyl-D-phenylglycine methyl ester]) Derivative



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