Estimation of ? value in proton NMR relaxation times of dibenzo diaza 18-crown-6 ether derivative in solution
[ X ]
Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Spin-lattice (T-1) and spin-spin (T-2) relaxation times of seven peaks in dibenzo diaza 18-crown-6 ether derivative were measured at 300K with a Bruker 400 MHz NMR spectrometer. An equation was derived for correlation time tau from the ratio of the (1/T-1)/2(1/ T-2) using relaxation formulas pertaining to dipolar interactions. The correlation time was calculated from the equation for each peak using experimental data for (1/T-1)/2(1/T-2) ratio. The estimated tau values ranged from 0.7 ns to 2 ns. The similarity of T values of the peaks belonging to the different parts of the molecule suggested that overall molecular tumbling may be responsible for relaxation mechanism of all the groups. (c) 2006 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
[No Keyword]
Kaynak
Chemical Physics Letters
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
427
Sayı
4-6
