JEDRSKA KVADRUPOLNA
RESONANCA 14N
Osnovno
stanje jedra 14N ima spin 1 in je zato trikrat degenerirano.
Sklopitev električnega kvadrupolnega momenta jedra z lokalnim nehomogenim
električnim poljem odpravi degeneracijo. Frekvence prehoda med
energijskimi nivoji imenujemo kvadrupolne resonančne frekvence. V primeru
jedra s spinom 1 jih označimo kot ,
in
Odvisne so od dveh parametrov:
kvadrupolne sklopitvene konstante e2qQ/h in asimetrijskega parametra
gradienta električnega polja, ki ga označimo z
. Kvadrupolne resonančne frekvence, ki so v primeru 14N
večinoma nižje od 4 MHz, so povezane s porazdelitvijo električnega
naboja (predvsem elektronov) v okolici opazovanega jedra, strukturo molekul in
kristalov ter kemijskimi vezmi. So tudi dober indikator strukturnih sprememb na
primer pri faznih prehodih, kristalnih polimorfih itd.
Kratka
teorija jedrske kvadrupolne resonance:
J. Seliger, Nuclear quadrupole resonance: theory,
Poglavje v knjigi »Encyclopedia of Spectroscopy and Spectrometry«, Ed. J. C.
Lindon, G. E. Tranter and J. L. Holmes, Academic Press, San Diego etc., 2000,
p. 1672-1680
Objavljena
dela:
1. R. Blinc, M. Mali, R. Osredkar, A. Prelesnik, J.
Seliger,I. Zupančič, L. Ehrenberg,
14N NQR spectroscopy of some
amino acids and nucleic bases via double
resonance in
the laboratory frame, J. Chem. Phys 57, 5087-5093 (1972)
2. R. Blinc, M. Mali, R. Osredkar, J. Seliger, L.
Ehrenberg, 14N quadrupole
resonance in
polyglycine, Chem. Phys. Letters 28, 158-159 (1974)
3. R. Blinc, M. Mali, R. Osredkar, J. Seliger, Nitrogen and chlorine NQR in
paraelectric
and ferroelectric tris-sarcosine calcium chloride, J. Chem. Phys.
63,
35-37 (1975)
4. J. Seliger, R. Osredkar, M. Mali, R. Blinc, 14N
quadrupole resonance of some
liquid
crystalline compounds in the solid, J.Chem. Phys. 65, 2887-2891 (1976)
5. J. Seliger, R. Blinc, H. Arend, R. Kind, Proton-14N
double resonance study of the
structural
phase transitions in the perovskite type layer compound
(CH3NH3)2CdCl4,
Z. Phys. B 25, 189-195 (1976)
6. J. Seliger, R. Osredkar, V. Žagar, R. Blinc,
Orientational order in biaxial liquid
crystals, Phys.
Rev. Letters 38, 411-415 (1977)
7. E. Hadjoudis, F. Milia, J. Seliger, R. Blinc, 14N
quadrupole coupling in some
thermochromic
and photochromic N-salicylideneanilines, Solid State Commun. 21,
541-543 (1977)
8. J. Seliger, V. Žagar, R. Blinc, 14N
nuclear-quadrupole-resonance study of
orientational
ordering in the smectic phases of achiral TBBA and chiral TBACA,
Phys. Rev. A 17,
1149-1155 (1978)
9. E. Hadjoudis, F. Milia, J. Seliger, R. Blinc, Temperature
dependence of the 14N
quadrupole
resonance in some thermochromic and photochromic
N-salicylideneanilines, Phys. Stat. Sol. (a) 46, 239-244 (1978)
10. E. Hadjoudis, F. Milia, J. Seliger, R. Blinc, 14N
quadrupole coupling in
thermochromic
N-5-chlorosalicylideneaniline, Chem. Phys. Letters 56, 382-384
(1978)
11. R. Blinc, J. Seliger, M. Vilfan, V. Žagar,
Temperature dependence of
orientational
ordering in the smectic H and smectic VI phases of TBBA,
J. Chem. Phys. 70, 778-783 (1979)
12. E. Hadjoudis, F. Milia, J. Seliger, R. Blinc, V.
Žagar, 14N quadrupole coupling in
thermochromic
and photochromic N-salicylideneanilines, Chem. Phys. 47,
105-109 (1980)
13. M. Vilfan, R. Blinc, J. Seliger, V. Žagar, Molecular
orientational ordering in the
smectic C* and
H* phases of chiral TBACA, Ferroelectrics 24, 211-214 (1980)
14. M. Vilfan, J. Seliger, V. Žagar, R. Blinc, 14N
NQR and 1H
NMR study of the
smectic phase
of IBPBAC, Phys. Letters A 79, 186-188 (1980)
15. J. Seliger, V. Žagar, R. Blinc, H. Arend, G. Chapuis,
14N and 35Cl double
resonance
study of the phase transition in the intercalated bilayer compound
C10H21NH3Cl,
J. Chem. Phys. 78, 2661-2664 (1983)
16. S. Jurga, J. Seliger, R. Blinc, H. W. Spiess, 14N
and 35Cl double resonance study
of the
low-temperature phase transition in CH3NH3ClO4,
Phys. Letters A 116,
295-298 (1986)
17. J. Seliger, V. Žagar, R. Blinc, A. Novak, S. Rodin 17O
and 14N quadrupole
coupling and
the mechanism of the ferroelectric transition in diglycine nitrate,
Ferroelectrics
Letters 6, 93-102 (1986)
18. J. Seliger, V. Žagar, R. Blinc, F. Milia, S.
Giannacopoulos, R. Kind, Proton-14N
double resonance
study of the ferroelectric phase transition in (CH3NH3)HgCl3,
Solid State
Commun. 59, 877-879 (1986)
19. J. Seliger, V. Žagar, R. Blinc, R. Kind, H. Arend, F.
Milia, 14N and 35Cl nuclear
quadrupole
double resonance study of the structural phase transitions in
N-octylammoniumchloride, Z. Phys. B - Condensed Matter 67,
363-368 (1987)
20. J. Seliger, V. Žagar, R. Blinc, R. Kind, H. Arend, G.
Chapuis, K. J. Schenk,
F. Milia, 14N
and 35Cl nuclear quadrupole double resonance study of the phase
transitions in
N-decylammoniumchloride and N-hexylammoniumchloride,
Z. Phys. B - Condensed Matter 69,
379-384 (1987)
21. J. Seliger, V. Žagar, R. Blinc, H. Arend, P.
Gunter, 14N quadrupole
coupling in
COANP, Chem.
Phys. Letters 142, 334-335 (1987)
22. S. V. Rodin, J. Seliger, R. Blinc, V. Žagar, JKR 14N
i 17O v kristalle diglicinnitrata,
Fizika
Tverdogo Tela, 29, 1871-1873 (1987)
23. J. Seliger, V. Žagar, R. Blinc, 14N NQR
study of the structural phase transitions in
NH4NO3,
Z. Phys. B - Condensed Matter 77, 439-443 (1989)
24. J. Seliger, V. Žagar, R. Blinc, E. Hadjoudis, F.
Milia, 1H-14N and 1H-17O nuclear
quadrupole
resonance in thermochromic N-5-chlorosalicylideneaniline,
Chem. Phys. 142, 237-244 (1990)
25. R. Blinc, P. Kerkoč, J. Hulliger, R. Kind, P.
Gunter, J. Seliger, V. Žagar,
14N
quadrupole coupling in DAN and MBANP, Chem. Phys. Letters 167, 588-590
(1990)
26. R. Blinc, J. Seliger, V. Žagar, T. Apih, J. Dolinšek,
H. Warhanek, A. Fuith,
W. Schranz, 14N
nuclear-quadrupole-resonance study of the structural phase
transitions
in NH4SCN, Phys. Rev. B 42, 8125-8132 (1990)
27. E. Hadjoudis, F. Milia, J. Seliger, V. Žagar, R.
Blinc, 14N NQR investigation of
some thermochromic and photochromic
salicylideneanilines and related
compounds,
Chem. Phys. 156, 149-155 (1991)
28. J. Seliger, V. Žagar, 14N nuclear
quadrupole resonance study of the structural
phase
transition in phenothiazine, J. Phys.: Condens. Matter 6, 6027-6033
(1994)
29.
J. Seliger, V. Žagar, 1H NMR and 14N NQR study of the
ferroelectric phase
transition in (CH3)2NH2H2PO4,
Phys. Rev. B 57, 8160-8165 (1998)
30. J. Seliger, V. Žagar, NMR and NQR study of molecular
dynamics in a model
bilayer
compound C6H13NH3Cl, J. Chem. Phys. 108,
9783-9788 (1998)
31. J. N. Latosinska, J. Seliger, B. Nogaj, Electron
density distribution in 2-nitro-
5-methylimidazole derivatives studied by NMR-NQR double resonance,
Magn. Res.
Chem 37, 878-880 (1999)
32.
J. N. Latosinska, J. Seliger, V. Grechishkin, J. Spychala, Studies of the
electronic structureof 4-N-cytosine
derivatives by NMR-NQR double
resonance spectroscopy, Magn. Res. Chem 37,
881-884 (1999)
33. Blinc, J. Seliger, D. Arčon, P. Cevc, V. Žagar, 1H-14N
double resonance of
TNT from a
land mine, Phys. Stat. Solidi (a) 180, 541-545 (2000)
34. J. Seliger and V. Žagar, 14N nuclear quadrupole resonance in
solid
4,4′-azoxyanisole
and 4,4′-bis(heptyloxy)azoxybenzene, Chemical Physics
306,
309-314 (2004)
35. J. Seliger, V. Žagar, R. Blinc, F. Milia, Temperature dependence of 17O and
14N NQR frequencies in commercial TNT, Applied Magnetic Resonance 29,
541-548 (2005)
36. R. Blinc, J. Seliger, A.
Zidanšek, V. Žagar, F. Milia and H. Robert, 14N nuclear
quadrupole resonance of some sulfa drugs,
Solid State Nuclear Magnetic
Resonance 30, 61-68 (2006)
37. J. Seliger, V. Žagar, A. Zidanšek and R. Blinc, 14N
nuclear quadrupole
resonance of picolinic, nicotinic, isonicotinic and dinicotinic acids , Chemical
Physics 331, 131-136 (2006)
38.
T Asaji, J Seliger, V Žagar, M Sekiguchi, J Watanabe, K Gotoh, H Ishida,
S Vrtnik, J Dolinsek, Phase
transition and temperature dependent electronic
state of an organic ferroelectric,
phenazine-chloranilic acid (1:1), J. Phys.
Condens. Matter 19, 226203 (2007)
39. J. Seliger, V. Žagar, 14N
NQR study of nicotinamide and related compounds,
Magn. Reson. Chem. 46, 58-62
(2008)
40. J. Seliger, V.
Žagar, 14N NQR Study of Diphenylamine, Z. Naturforsch. 63a,
88 – 92 (2008)
41. J. Seliger, V. Žagar,
Measurement of the 14N nuclear quadrupole resonance
frequencies by the solid effect. J. Magn.
Reson. 193, 54-62 (2008)
42. J. Seliger, V. agar , T. Asaji , A. Konnai ,
Temperature dependence of
nonequivalent potential wells for
pyridinium ion reorientation in pyridinium
tetrachloroiodate(III), PyHICl4,
studied by 1H-14N nuclear quadrupole double
resonance, Magn. Reson. Chem. 46, 756-760
(2008)
43. J. Seliger, V. Žagar,
Sensitivity of nuclear-quadrupole double-resonance
detection of half-integer spin nuclei, J.
Magn. Reson. 194, 175-181 (2008)
doi:10.1016/j.jmr.2008.06.021
44. J. Seliger, V. Žagar, T.
Asaji, 14N nuclear quadrupole resonance and proton
spin-lattice relaxation study of phase
transition in pyridazine perchlorate, Solid
State Commun. 149, 546-549 (2009)
doi: 10.1016/j.ssc.2009.01.008
45. J. Seliger, V. Žagar, K. Gotoh, H. Ishida, A.
Konnai, D. Amino, T. Asaji,
Hydrogen bonding in
1,2-diazine–chloranilic acid (2:1) studied by a 14N
nuclear quadrupole coupling tensor and
multi-temperature X-ray diffraction
Phys. Chem. Chem. Phys. 11, 2281-2286 (2009) DOI:
10.1039/b818318j
46. J. Seliger, V. Žagar,
Double resonance experiments in low magnetic field.
Dynamic polarization of protons by 14N
and measurement of low NQR
frequencies, J. Magn. Reson. 199,
199-207 (2009)
doi:10.1016/j.jmr.2009.05.001
47. J.N. Latosińska , M. Latosińska, J. Seliger, V. Žagar, Z. Kazimierczuk,
Electron density distribution
in cladribine (2-chloro-2-deoxyadenosine) - a drug
against leukemia and multiple sclerosis –
studied by multinuclear nqr
spectroscopy and dft calculations, Chem. Phys. Letters 476,
293-302 (2009)
doi:10.1016/j.cplett.2009.06.038
48. J. N. Latosinska, J. Seliger, V. Žagar, D. V.
Burchardt, Hydrogen bonding and
stacking π-π Interactions in solid
6-thioguanine and 6-mercaptopurine
(antileukemia
and antineoplastic drugs) studied by NMR-NQR double
resonance
spectroscopy and density functional theory
J. Phys. Chem. A 113, 8781-8790 (2009) doi: 10.1021/jp904331z
49. J. Pirnat ,
J. Lužnik, V. Jazbinšek, V. Žagar, J. Seliger, T. M. Klapötke,
Z. Trontelj, 14N NQR in the tetrazole family, Chemical Physics 364, 98–104
(2009)
50. J.
N. Latosinska, M. Latosinska, J. Seliger, V. Žagar, J. K. Maurin,
A. Orzeszko,
Z. Kazimierczuk, Structural Study of Selected Polyhalogenated
Benzimidazoles (Protein Kinase CK2 Inhibitors) by Nuclear Quadrupole
Double
Resonance, X-ray, and Density Functional Theory, J. Phys. Chem. A
114, 563–575 (2010) doi:
10.1021/jp9075492
51. J. Seliger,
V. Žagar, T. Asaji, Y. Hasegawa, 14N NQR and proton NMR study
of ferroelectric phase transition and
proton exchange in organic ferroelectric
(H2-TPPZ)(Hca)2, Phys. Chem. Chem. Phys. 12, 3254-3259 (2010),
DOI:10.1039/ B925326B
52. T. Asaji, J. Seliger, V.
Žagar, H. Ishida, Correlation between proton transfer
and 35Cl NQR frequency as well as molecular geometry of
chloranilic acid in
co-crystals with some organic bases, Magn. Reson. Chem. 48,
531-536
(2010) DOI: 10.1002/mrc.2613
53. Z. Lavri, J. Pirnat, J. Lu
nik, J. Seliger, V.
agar, Z. Trontelj, S. Srčič,
Application of 14N NQR to the
study of piroxicam polymorphism, J. Pharm.
Sci. 99, 4857-4865
(2010) DOI:
10.1002/jps.22186
55. J. Seliger, V. Žagar, 14N NQR study of polymorphism and hydrogen bonding
in molecular complex isonicotinamide-oxalic acid (2:1), J. Phys. Chem. A
114, 12083-12087 (2010) DOI: 10.1021/jp105449w
56. T. Asaji, M. Hoshino, H.
Ishida, A. Konnai, Y. Shinoda, J. Seliger, V. Žagar,
Phase transition and proton exchange in 1,3-diazinium
hydrogen chloranilate
monohydrate,
Hyperfine Interactions 198, 85-91
(2010)
DOI: 10.1007/s10751-010-0205-4
57. J. Latosińska, M. Latosińska, M. Tomczak, J. Seliger, V. Žagar,
Supramolecular synthon pattern in solid clioquinol and cloxiquine (APIs of
antibacterial, antifungal, antiaging and antituberculosis drugs) studied by 35Cl
NQR, 1H-17O and 1H-14N NQDR and DFT/QTAIM, J. Mol. Model. 17, 1781-
1800 (2011) DOI: 10.1007/s00894-010-0876-4
58. J.N.Latosińska, J.Seliger, V.Žagar, D.V.Burchardt, A
comparative study of the
hydrogen-bonding patterns and prototropism
in solid 2-thiocytosine (potential
antileukemic
agent) and cytosine, as studied by 1H-14N NQDR and
QTAIM/ DFT, J. Mol. Model. 18, 11-26 (2012)
DOI: 10.1007/s00894-011-1021-8
59. J. Seliger, V. Žagar, T. Asaji, K. Gotoh, H. Ishida, 14N nuclear quadrupole
resonance study
of phase transitions and molecular dynamics in hydrogen
bonded organic antiferroelectrics 55DMBP-H2ca and 1,5-NPD-H2ca,
Phys. Chem. Chem. Phys. 13,
9165-9172 (2011) DOI: 10.1039/C0CP02873H
60. J. Lužnik, V. Jazbinšek, J. Pirnat, J. Seliger, Z. Trontelj, Zeeman shift – a tool
for assignment of 14N NQR
lines of nonequivalent 14N atoms in powder
samples , J. Magn. Reson. 212, 149
-153 (2011)
DOI:10.1016/j.jmr.2011.06.023
61. J. Seliger, Nuclear
quadrupole resonance study of hydrogen bonded solid
materials, Acta Chim. Slov. 58,
471-477 (2011)
62. J. Seliger, V. Žagar,
Phonon driven proton transfer in 3,5-pyridine
dicarboxylic acid studied by 2H,
14N and 17O NQR, J. Phys. Chem. A 115,
11652-11654 (2011) DOI: 10.1021/jp206897v
63. J. N.
Latosińska and M. Latosińska , J. Seliger and V. Žagar , J. K. Maurin
,
Z. Kazimierczuk, Nature of isomerism of solid
isothiourea salts, inhibitors of
Nitric oxide synthases, as studied by 1H–14N
nuclear quadrupole double
resonance, X-ray, and Density functional
theory/Quantum theory of atoms in
molecules, J. Phys.
Chem. A 116, 1445-1463 (2012)
DOI: 10.1021/jp210322p
64.
J.N. Latosińska, M. Latosińska,
J. Seliger, V. Žagar, An
innovative method
for the non-destructive identification of photodegradation products in solid
state. 1H-14N
NMR-NQR and DFT/QTAIM study of photodegradation of
nifedipine
(anti-hypertensive) to nitrosonifedipine (potental antioxidative),
Eur. J. Pharm. Sci. 47, 97-107
(2012)
DOI: http://dx.doi.org/10.1016/j.ejps.2012.05.001
65. J.
Seliger, V. Žagar, M. Latosińska,
J. N. Latosińska, Electron configuration
and hydrogen
bonding pattern in several thymine and uracil analogues
studied by 1H-14N
NQDR and DFT/QTAIM, J. Phys. Chem. B 116, 8793-8804
(2012) DOI: 10.1021/jp302659k
66.
J. Seliger, V. Žagar, Nuclear
quadrupole resonance characterization of
carbamazepine cocrystals, Solid State Nucl. Magn. Reson. 47-48,
47-52
(2012) http://dx.doi.org/10.1016/j.ssnmr.2012.09.001
67. J. Seliger, V. Žagar, New methods for detection
of 14N NQR frequencies,
Appl. Magn. Reson. 43, 469-484 (2012) DOI:
10.1007/s00723-011-0303-8
68. T. Asaji , Y. Ito , J. Seliger , V. Žagar
, A. Gradisek, T. Apih,
Phase transition
and
ring-puckering motion in a metal-organic perovskite
[(CH2)3NH2][Zn(HCOO)3], J. Phys. Chem. A 116, 12422-12428 (2012)
DOI: 10.1021/jp310132a
69.
J. Seliger, V. Žagar, T. Asaji,
NQR investigation and characterization of
cocrystals
and crystal polymorphs, Hyperfine Interactions 222, 1-13 (2013)
DOI: 10.1007/s10751-012-0665-9
70. J. Seliger, V. Žagar, Tautomerism
and possible polymorphism in solid
hydroxypyridines and pyridones
studied by 14N NQR, J. Phys. Chem. A 117,
1651-1658 (2013) DOI:
10.1021/jp3117038
71.
J. Seliger, V. Žagar, Hydrogen Bonds in Cocrystals and Salts of 2-Amino-4,6-
Dimethylpyrimidine
and Carboxylic Acids Studied by NQR, J. Phys. Chem. B
117, 6946-6956 (2013) DOI: 10.1021/jp403617e
72.
J. Seliger, V. Žagar, Crystallization of an amorphous
solid studied by nuclear
quadrupole
double resonance, Chem. Phys. 421, 44-48 (2013)
DOI: 10.1016/j.chemphys.2013.06.005
73. J. Seliger, V. Žagar,
Nuclear quadrupole resonance
study of hydrogen bonds
in solid
2-methylbenzimidazole and 5,6-dimethylbenzimidazole, J Phys.
Chem. C 117, 20193-20200 (2013) DOI: 10.1021/jp4071746
74. J.
Seliger, V. Žagar, Nuclear Quadrupole Resonance Investigation of
Hydrogen Bonding in Some Cocrystals of
2,3,5,6-Tetramethylpyrazine and
Carboxylic Acids, J. Phys. Chem. B 118,
996-1002 (2014)
DOI: 10.1021/jp412332p
75. J. Lužnik, J. Pirnat, V.
Jazbinšek, Z. Lavrič, V. Žagar, S. Srčič, J. Seliger,
Z. Trontelj, 14N Nuclear
Quadrupole Resonance Study of Polymorphism in
Famotidine, J. Pharm. Sci. 103,
2704-2709 (2014) DOI: 10.1002/jps.23956
76. J. Seliger, V. Žagar,
Hydrogen bonding and proton transfer in cocrystals of
4,4’-bipyridil and organic acids studied
by nuclear quadrupole resonance,
Phys. Chem. Chem. Phys. 16,
18141-18147 (2014)
DOI: 10.1039/C4CP02665A (prost dostop)
77.
J. N. Latosińska, M. Latosińska,
J. Seliger, V. Žagar, Z. Kazimierczuk,
An Insight Into Prototropism and Supramolecular
Motifs in Solid-State
Structure of
Allopurinol, Hypoxanthine, Xanthine and Uric Acid. A 1H-14N
NQDR Spectroscopy and Hybrid DFT/QTAIM
and Hirshfeld Surface-Based
Study J. Phys. Chem. B 118,
10837-10853 (2014) DOI: 10.1021/jp504871y
78. J. N. Latosińska, M.
Latosińska, G. Olejniczak, J. Seliger, V. Žagar, Topology
of the Interactions Pattern in
Pharmaceutically Relevant Polymorphs of
Methylxanthines (Caffeine, Theobromine
and Theophiline). Combined
Experimental (1H-14N
NQDR) and Computational (DFT and Hirshfeld –
Based) Study, J. Chem. Inf. Model. 54,
2570-2584 (2014)
DOI: 10.1021/ci5004224
79.
J. N. Latosińska, M. Latosińska,
J. Seliger, V. Žagar, D. V. Burchardt,
K. Derwich,
Unusual case of desmotropy. Combined spectroscopy (1H-14N
NQDR) and quantum chemistry (Periodic
hybrid DFT/QTAIM and Hirshfeld
surface-based) study
of solid dacarbazine (anti-neoplastic), Solid State Nucl.
Magn. Reson. 68-69, 13-24 (2015) doi:10.1016/j.ssnmr.2015.04.005
80. J. N. Latosińska, M.
Latosińska, M. Szafrański, J. Seliger, V. Žagar,
D. V. Burchardt, Impact of structural
differences in carcinopreventive agents
Indole-3-carbinol and 3,3’-
diindolylmethane on biological activity. An X-ray,
1H-14N NQDR, 13C
CP/MAS NMR, and Periodic Hybrid DFT Study
Eur. J. Pharm. Sci. 77,
141-153 (2015) doi:10.1016/j.ejps.2015.06.003
81. J.
Seliger, V. Žagar, T. Apih, A. Gregorovič, M. Latosińska, G.
Olejniczak,
J. N. Latosińska, Polymorphism and
Disorder in Natural Active Ingredients.
Topological Insights into of Two
Anhydrous Polymorphs of Caffeine:
Spectroscopic (1H-14N NMR-NQR/14N NQR)
and Solid-State Computational
Modelling (DFT/QTAIM/RDS) Study, Eur. J.
Pharm. Sci. 85, 18-30 (2016)
doi: 10.1016/j.ejps.2016.01.025
82. T. Apih, V. Žagar, J. Seliger, NMR
and NQR Study of Above-Room-
Temperature Molecular Ferroelectrics Diisopropylammonium Chloride and
Diisopropylammonium
Perchlorate, J. Phys. Chem. C 120,
6180-6189 (2016)
DOI: 10.1021/acs.jpcc.5b12116
83. T. Apih, A.
Gregorovič, V. Žagar, J. Seliger, Nuclear Quadrupole Resonance
Study of Proton and Deuteron Migration in
Short Strong Hydrogen Bonds
Formed in Molecular Complex
3,5-Dinitrobenzoic Acid–Nicotinic Acid and in
Deuterated 3,5-Pyridinedicarboxylic acid,
J. Phys. Chem. C 120, 9992-10000
(2016) DOI: 10.1021/acs.jpcc.6b02639
84. A. Gregorovič, T.
Apih, J. Seliger, 1H-14N Cross-Relaxation Spectrum
Analysis in Sildenafil and Sildenafil
Citrate, Solid State Nucl. Magn. Reson.
78, 16-23 (2016) doi:
10.1016/j.ssnmr.2016.05.003
85. J. N. Latosinska, M.
Latosinska, M. Szafranski, J. Seliger, V. Žagar,
Polymorphism and Thermal Stability of
Natural Active Ingredients. 3,3’-
Diindolylmethane (Chemopreventive and
Chemotherapeutic) Studied by a
Combined X-Ray, 1H – 14N
NMR-NQR, DSC and Solid-State DFT/3D
HS/QTAIM/RDS Computational Approach,
Cryst. Growth Des. 16,
4336-4348 (2016) DOI:
10.1021/acs.cgd.6b00456
86. A. Gregorovič, T.
Apih, V. Žagar, J. Seliger, 14N NQR Reveals Proton
Position in N-H...N Bonds: A Case Study
with Proton Sponges, Phys. Chem.
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