The Examination of a Variety of Different Ions Added to the Crown Ether Derivatives with High Field NMR Spectrometer
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Tarih
2017
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Maik Nauka/Interperiodica/Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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 H-1 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.
Açıklama
Anahtar Kelimeler
Nmr, Crown Ethers, Chemical Shifts, T-1 Relaxation Time, Binding Constants
Kaynak
Russian Journal of Physical Chemistry B
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
11
Sayı
3
