Hyperfine Interactions

, Volume 231, Issue 1–3, pp 1–4 | Cite as

14 N NQR spectrum of sildenafil citrate



The 14N nuclear quadrupole resonance (NQR) spectrum of sildenafil citrate tablets has been recorded allowing the quadrupole coupling constants and asymmetry parameters of all six unique nitrogen atoms in its structure to be determined. A density function calculation gives results that are largely in agreement with the experimental values.


NQR 14Double resonance Sildenafil citrate 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Chemistry DepartmentUniversity of the West IndiesSt. AugustineTrinidad and Tobago

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