Quadrupole relaxation enhancement and polarisation transfer in DMSO solution of [Bi(NO3)(3)(H2O)(3)]*18-crown-6 in solid state

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Kruk D., Masiewicz E., Umut E., Schloegl M., Fischer R., Scharfetter H.

MOLECULAR PHYSICS, cilt.117, sa.7-8, ss.944-951, 2019 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 117 Sayı: 7-8
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1080/00268976.2018.1552798
  • Dergi Adı: MOLECULAR PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.944-951
  • Anahtar Kelimeler: NMR, relaxation, quadrupole peaks, polarization transfer, NUCLEAR-SPIN RELAXATION, H-1-N-14 CROSS-RELAXATION, SLOW-MOTION THEORY, LATTICE-RELAXATION, CONTRAST AGENTS, FIELD, DISPERSION, COMPLEXES, STEP
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

H-1 spin-lattice relaxation studies have been performed for pure [Bi(NO3)(3)(H2O)(3)]*18-crown-6 in powder and its solution in dimethyl sulfoxide (DMSO). The experiments have been carried out in the frequency range of 10kHz-30MHz and the temperature range of 240-277K; at 277K the solution is already frozen. The H-1 relaxation of pure [Bi(NO3)(3)(H2O)(3)]*18-crown-6 has been interpreted in terms of three dynamical processes. Quadrupole Relaxation Enhancement effects have been observed in the frozen DMSO solution of [Bi(NO3)(3)(H2O)(3)]*18-crown-6. The specific mechanisms of the H-1 spin-lattice relaxation enhancement have been discussed distinguishing between effects caused by time independent (residual) and fluctuating H-1-Bi-209 dipole-dipole interactions.