The examination of a variety of different ions added to the crown ether derivatives with high field NMR spectrometer
| Autor: | Muzaffer Askin, M. Zafer Köylü, Sibel Korunur, Bilgin Zengin, Harun Kor |
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| Přispěvatelé: | Mühendislik Fakültesi, Tunceli Meslek Yüksekokulu |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
NMR crown ethers chemical shifts T1 relaxation time binding constants Spectrometer 010405 organic chemistry Chemical shift Analytical chemistry 010402 general chemistry Sodium perchlorate 01 natural sciences Lithium perchlorate 0104 chemical sciences Ion chemistry.chemical_compound chemistry Proton NMR Titration Physical and Theoretical Chemistry Crown ether |
| Popis: | The current study involves the measurements of T 1 relaxation time of complexes three different crown ethers (4-aminobenzo-15-Crown-5, 1-Aza-18-Crown-6, 1-Aza-15-Crown-5) and two different ions sodium perchlorate (NaClO4), lithium perchlorate (LiClO4) by a 400 MHz NMR spectrometer. The association constants (K a) of the complexes were determined on the basis of the evaluation of these measurements using the Benesi-Hildebrand method that we have modified. These association constants were consistent with those obtained from 1H NMR titration technique. As a result, it can be speculated that binding constants could be measured using T 1 relaxation time when chemical shifts are very small or cannot be observed. |
| Databáze: | OpenAIRE |
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