Pregled bibliografske jedinice broj: 1144531
Diamantanes are a hydrophobic cavity's best friend: the role of solvent structuring in complex stability
Diamantanes are a hydrophobic cavity's best friend: the role of solvent structuring in complex stability // Adriatic NMR Conference 2021 : Book of abstracts / Bregović, Nikola ; Namjesnik, Danijel ; Novak, Predrag ; Parlov Vuković, Jelena (ur.).
Zagreb: Hrvatsko kemijsko društvo, 2021. str. 61-61 (poster, nije recenziran, sažetak, znanstveni)
CROSBI ID: 1144531 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Diamantanes are a hydrophobic cavity's best
friend: the role of solvent structuring in
complex stability
Autori
Usenik, Andrea ; Markuš, Iva ; Pičuljan, Katarina ; Alešković, Marija ; Šekutor, Marina ; Požar, Josip
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Adriatic NMR Conference 2021 : Book of abstracts
/ Bregović, Nikola ; Namjesnik, Danijel ; Novak, Predrag ; Parlov Vuković, Jelena - Zagreb : Hrvatsko kemijsko društvo, 2021, 61-61
Skup
The Adriatic NMR Conference 2021
Mjesto i datum
Primošten, Hrvatska, 13.09.2021. - 15.09.2021
Vrsta sudjelovanja
Poster
Vrsta recenzije
Nije recenziran
Ključne riječi
Hydrophobic effect ; solvophobic effect ; inclusion complex ; complexation thermodynamics ; cyclodextrins ; cucurbit[7]uril ; mannoconjugates
Sažetak
Diamantane derivatives are excellent guests for cucurbiturils in aqueous solutions, forming complexes with stability constants reaching above petamolar values. On the other hand, their complexation with cyclodextrins has been scarcely explored. We therefore studied temperature and solvent effects on the complexation of diamantane alcohols with cucurbit[7]uril, β- and γ- cyclodextrin by means of isothermal titration calorimetry and NMR spectroscopy. The stability constant among all investigated complexes was by far the highest in the case of the diol derivate with cucurbit[7]uril in water. A pronounced temperature dependence of ΔrH° and ΔrS°, resulting in an almost complete enthalpy- entropy compensation, was observed for most studied host-guest systems. The corresponding complexation thermodynamics were in line with the classical rationale of the solvophobic effect at lower temperatures, and the non- classical explanation at higher ones. The results of 1H NMR titrations and ROESY experiments were in line with the thermodynamic studies and have revealed an interesting difference in complex formation kinetics between cucurbit[7]uril and β-cyclodextrin.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Projekti:
HRZZ-IP-2019-04-9560 - Koordinacijske reakcije makrocikličkih liganada u otopini (MacroSol) (Tomišić, Vladislav, HRZZ - 2019-04) ( CroRIS)
--UIP-2017-05-9653 - Diamantoidni sustavi s heteroatomima – priprava i primjena u razvoju naprednih materijala (DiamMat) (Šekutor, Marina) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb
Profili:
Marija Alešković
(autor)
Katarina Pičuljan
(autor)
Josip Požar
(autor)
Andrea Usenik
(autor)
Marina Šekutor
(autor)