Naslov
Thermodynamics of complexation reactions of antracene-based fluorescent calix[4]arene derivatives with alkali metal cations

Autori
Leko, Katarina ; Bregović Nikola ; Cindro, Nikola ; Tomišić, Vladislav.

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

Izvornik
14th International Conference on Calixarenes (Calix2017) / - , 2017, P16-P16

Skup
14th International Conference on Calixarenes (Calix2017)

Mjesto i datum
Tianjin, Kina, 20.08.2017. - 24.08.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
calix[4]arene ; antracene ; diphenylantracene ; alkali metal cations

Sažetak
Calixarenes bearing fluorescent moieties can be considered as potential very sensitive fluorimetric ion sensors due to the high sensitivity of fluorimetry.1–4 In the scope of this work novel fluorescent antracene- and diphenylantracene-based calix[4]arene derivatives 1 and 2 were designed and synthesized. Antracene and diphenylantracene moieties were introduced at a lower calixarene rim and served as fluorescent groups positioned close to the cation-binding site. Due to the low solubilities of the prepared calix[4]arene derivatives in solvents of moderate permittivities, their complexation with alkali metal cations was studied in methanol–dichloromethane and acetonitrile–dichloromethane solvent mixtures (φ = 0.5). Stability constants of the corresponding complexes were determined by means of fluorimetry, UV spectrophotometry, and isothermal titration calorimetry. The latter technique also provided information on reaction enthalpies and entropies. The obtained thermodynamic quantities were discussed regarding the structural characteristics of the ligands and solvation properties of the solvents used.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA