Naslov
Complexation Properties of Phenantridine-Based Calix[4]arene Derivatives

Autori
Leko, Katarina ; Usenik, Andrea ; Cindro, Nikola ; Modrušan, Matija ; Tomišić, Vladislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
26. Hrvatski skup kemičara i kemijskih inženjera s međunarodnim sudjelovanjem ; 4. Simpozij Vladimir Prelog : knjiga sažetaka / Galić, Nives ; Rogošić, Marko - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2019, 104-104

ISBN
978-953-6894-67-3

Skup
26. hrvatski skup kemičara i kemijskih inženjera (26HSKIKI) ; 4. simpozij Vladimir Prelog

Mjesto i datum
Šibenik, Hrvatska, 09.04.2019. - 12.04.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
calix[4]arenes ; ion receptors , thermodynamics ; solvation ; fluorescence
(calix[4]arenes ; ion receptors ; thermodynamics ; solvation ; fluorescence)

Sažetak
Calixarenes are macrocyclic oligomers consisted of four or more phenolic residues linked by methylene bridges in the ortho position. As such, they can be easily functionalized with ketone, ester, amide, or other functional groups on the lower and/or upper rim to give efficient receptors for various ionic or neutral species. Due to the prominent sensitivity of fluorescence spectroscopy and high affinity of these macrocyclic ligands towards cations, it is possible to prepare highly sensitive ion sensors by introducing fluorescent substituents into the calixarene moiety. In the scope of this work, the binding affinities of tertiary amide and ester phenantridinebased calix[4]arene derivatives L1 and L2 towards alkali, alkaline earth and lanthanide cations in various organic solvents (acetonitrile, methanol, ethanol, N, N‐dimethylformamide, dimethyl sulfoxide) were investigated. Stability constants of the corresponding complexes were determined (or in some cases only assessed) by means of UV spectrophotometry, fluorimetry, and isothermal titration calorimetry. The latter technique also provided information on reaction enthalpies and entropies. The obtained thermodynamic parameters were discussed regarding the structural characteristics of the studied compounds and solvation properties of the solvents used.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA