Ion pairing in H2O and D2O solutions of lead nitrate, as determined with Pb-207 NMR spectroscopy

Alkan F., Small T., Bai S., Dominowski A., Dybowski C.

JOURNAL OF STRUCTURAL CHEMISTRY, cilt.57, sa.2, ss.369-375, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57 Sayı: 2
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1134/s0022476616020189
  • Dergi Adı: JOURNAL OF STRUCTURAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.369-375
  • Anahtar Kelimeler: lead nitrate, contact-ion pair, equilibrium, exchange, NMR spectroscopy, CHEMICAL-SHIFT, AQUEOUS-SOLUTIONS, THERMODYNAMICS, APPROXIMATION, SALTS, WATER, DISSOCIATION, RELAXATION, DEPENDENCE, HYDRATION
  • Abdullah Gül Üniversitesi Adresli: Hayır

Özet

The temperature and concentration dependences of Pb-207 NMR chemical shifts of Pb(NO3)(2) in D2O are reported. The results are analyzed in terms of exchange between a solvated lead ion and the Pb(NO3)(+) contact-ion pair. Predictions of the chemical shift difference between the aquated ion and contact-ion pair are carried out for the gas-phase entities and for the solvated species with a DFT calculation. Previously reported data on Pb-207 NMR chemical shifts of Pb(NO3)(2) in H2O are reevaluated. From the analysis, the enthalpy of dissociation of the contact-ion pair is found to be-42.3 +/- 1.0 kJ/mol.