1.

Improved 14N NQR detection of trinitrotoluene using polarization transfer from protons to 14N

We showed that the combination of proton-nitrogen energy level crossing and the transfer of polarization from protons to nitrogen nuclei, which takes place during the level crossing, enhances the sensitivity of 14N NQR spectroscopy.

COBISS.SI-ID: 21141799

2.

14N NQR in the tetrazole family

14N NQR frequencies and spin-lattice relaxation time were measured in 5-AT and 5-ATM between 77K and 300K. Assignment of the frequencies to atomic positions was made and the results are analysed in relation to the molecular chemical bonds and possible H-bonds.

COBISS.SI-ID: 15286873

3.

Electron density distribution in cladribine – Studied by NQR and DFT calculations

Cladribine was studed experimantaly by 35Cl NQR and 14 N NMR-NQR double resonance and theoratically by the DFT. The effects of tautomeris, regioisomerism, conformations and molecular aggregations were found and related to intermolecular H-bond formation and the quadrupole parameters.

COBISS.SI-ID: 2175332

4.

Application of 14N NQR to the study of piroxicam polymorphism

It was shown that the 14N NQR successfully discriminate between different forms of piroxicam. 14N NQR spectroscopy demonstrated that it is successful in complemental studies of solid forms of pharmaceutical substances.

COBISS.SI-ID: 2825841

5.

Capacitor-based detection of nuclear magnetization : Nuclear quadrupole resonance of surfaces.

We demonstrated a successful use of a parallel plate capacitor as a probe in a NQR experiment, where the sample is located between the two capacitor plates and not in coil od a tank circuit as usually.

COBISS.SI-ID: 24453927