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Competitive processes associated to the interaction of a cavitand derivative with caffeic acid
- Source :
- Supramolecular Chemistry. 28:582-588
- Publication Year :
- 2016
- Publisher :
- Informa UK Limited, 2016.
-
Abstract
- The interaction of caffeic acid and a newly synthesised cavitand derivative was investigated by UV–vis and fluorescence spectroscopy in tetrahydrofuran–water matrix. The temperature dependence of the equilibrium constants was determined first, then the thermodynamic parameters were calculated using the van’t Hoff equation. Absorption measurements highlighted entropy-controlled formation of cavitand–caffeic acid complexes with 1:2 stoichiometry. It was proved by fluorescence measurements that caffeic acid dimerisation is followed by the formation of cavitand–caffeic acid complexes with 1:2 stoichiometry. It was also shown that both the caffeic acid dimerisation and the formation of 1:2 complexes are controlled by the entropy gain. PL signal is preferred to use for analytical application in this particular case.
- Subjects :
- 010405 organic chemistry
Chemistry
Cavitand
General Chemistry
010402 general chemistry
01 natural sciences
Fluorescence
Fluorescence spectroscopy
0104 chemical sciences
chemistry.chemical_compound
Computational chemistry
Caffeic acid
Organic chemistry
Host–guest chemistry
Stoichiometry
Equilibrium constant
Subjects
Details
- ISSN :
- 10290478 and 10610278
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Supramolecular Chemistry
- Accession number :
- edsair.doi...........488313b3ffcd60c7ab73995af7cdf4cb