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Nagymihály Z, Lemli B, Kollár L, Kunsági-Máté S. Solvent Switched Weak Interaction of a 4-Quinazolinone with a Cavitand Derivative. Molecules 2020; 25:molecules25081915. [PMID: 32326176 PMCID: PMC7221616 DOI: 10.3390/molecules25081915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/09/2020] [Accepted: 04/16/2020] [Indexed: 11/16/2022] Open
Abstract
Interaction of 4-quinazolinone with tetrakis (3,5-dicarboxylatophenoxy)-cavitand derivative has been studied in methanol and dimethylformamide media using fluorescence spectroscopy and molecular modeling methods. Results show temperature dependent complex formation: either the entropy gain or the high enthalpy changes are responsible for the formation of stable complexes in two separated temperature regions. However, different thermodynamic parameters are associated to different conformations of the complexes: while the high entropy gain associated to the formation of deeply included guest in methanol, the high entropy gain is associated with the formation of weakly included guest in dimethylformamide solvent. This finding highlights the importance of dynamic properties of the species interacted in different solvents.
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Affiliation(s)
- Zoltán Nagymihály
- Department of Inorganic Chemistry, Faculty of Sciences, University of Pécs, Ifjúság 6, H 7624 Pécs, Hungary; (Z.N.); (L.K.)
- János Szentágothai Research Center, University of Pécs, Ifjúság 20, H-7624 Pécs, Hungary;
| | - Beáta Lemli
- János Szentágothai Research Center, University of Pécs, Ifjúság 20, H-7624 Pécs, Hungary;
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pécs, Szigeti 12, H-7624 Pécs, Hungary
| | - László Kollár
- Department of Inorganic Chemistry, Faculty of Sciences, University of Pécs, Ifjúság 6, H 7624 Pécs, Hungary; (Z.N.); (L.K.)
- János Szentágothai Research Center, University of Pécs, Ifjúság 20, H-7624 Pécs, Hungary;
| | - Sándor Kunsági-Máté
- János Szentágothai Research Center, University of Pécs, Ifjúság 20, H-7624 Pécs, Hungary;
- Institute of Organic and Medicinal Chemistry, Medical School, University of Pécs, Szigeti 12, H-7624 Pécs, Hungary
- Department of General and Physical Chemistry, Faculty of Sciences, University of Pécs, Ifjúság 6, H 7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-503600
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