crta
Hrvatska znanstvena Sekcija img
bibliografija
3 gif
 Naslovna
 O projektu
 FAQ
 Kontakt
4 gif
Pregledavanje radova
Jednostavno pretraživanje
Napredno pretraživanje
Skupni podaci
Upis novih radova
Upute
Ispravci prijavljenih radova
Ostale bibliografije
Slični projekti
 Bibliografske baze podataka

Pregled bibliografske jedinice broj: 799747

Časopis

Autori: Bregović, Nikola; Cindro, Nikola; Frkanec, Leo; Tomišić, Vladislav
Naslov: Complexation of fluoride anion and its ion pairs with alkali-metal cations by tetra-substituted lower-rim calix[4]arene tryptophan derivative
Izvornik: Supramolecular chemistry (1061-0278) 28 (2016), 5/6; 608-615
Vrsta rada: članak
Ključne riječi: calixarenes ; fluoride binding ; ion-pair complexation ; stability constants
Sažetak:
Selective binding of fluoride anion and its alkali-metal-cation ion pairs by a fluorescent calix[4]arene (L) derivative bearing tryptophan moieties was studied in acetonitrile at 25 °C. It was found that LF and LF22− complexes were formed and their stability constants were determined by means of UV and 1H NMR titrations. Both amide and indole NH groups were involved in the stabilization of the fluoride complexes, i.e. L afforded two anion-binding sites. 1H NMR titrations provided evidence of simultaneous complexation of both Na+ cation and fluoride anion resulting in the formation of a ternary NaLF complex. In this ion-pair complex, the Na+ cation was most probably bound primarily by the calixarene ether and amide oxygen atoms, whereas the indole NH groups interacted with the fluoride ion. A highly favourable ion pairing between Na+ and F– in acetonitrile was studied using potentiometric measurements. The results pointed out the importance of fluoride pairing with alkali-metal cations in aprotic organic solvents and the necessity of taking these reactions into account in the course of speciation studies of such solutions
Projekt / tema: IP-2014-09-7309
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
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://www.tandfonline.com/doi/full/10.1080/10610278.2016.1154147
http://dx.doi.org/10.1080/10610278.2016.1154147
Broj citata:
Altmetric:
DOI: 10.1080/10610278.2016.1154147
URL cjelovitog teksta:
Google Scholar: Complexation of fluoride anion and its ion pairs with alkali-metal cations by tetra-substituted lower-rim calix[4]arene tryptophan derivative
Upisao u CROSBI: Nikola Bregović (nbregovic@chem.pmf.hr:Nikola.Bregovic@chem.pmf.hr), 11. Vel. 2016. u 10:36 sati



  Verzija za printanje   za tiskati


upomoc
foot_4