Proton-14N double resonance study of the structural phase transitions in the perovskite type layer compound (CH3NH3)2CdCl4

The crystal structure of γ-bis(ethylammonium) tetrachloromanganate(II) at 126 K and its phase transition

“…Up to now mainly the methyl compounds and their phase transitions have been studied in detail (Chapuis, Arend & Kind, 1975;Chapuis, Kind & Arend, 1976;Seliger, Blinc, Kind & Arend, 1976;Heger, Mullen & Knorr, 1975. We started our investigations on the ethyl and propyl compounds with M = Mn in order to show the influence of the alkyl chain length on the phase transition.…”

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

“…Three complementary double resonance techniques were applied to search for three 14 N NQR frequencies for each nucleus. The first method was the 1 H-14 N cross relaxation spectroscopy (Blinc et al, 1972;Seliger et al, 1976) then the solid-effect technique (Seliger and Žagar, 2008a,b) and finally the two-frequency irradiation technique (Seliger and Žagar, 2012;Seliger et al, 1994a,b) A more detailed description of the experimental techniques can be found in our earlier papers (e.g. allopurinol (Latosiń ska et al, 2014c) or caffeine (Latosiń ska et al, 2014b)).…”

Crystallization of an amorphous solid studied by nuclear quadrupole double resonance

“…On the other hand the sensitivity of NQDR is high so it can be used to observe broad NQR lines. In the present study we have used the NQDR techniques using cross relaxation [21][22][23], multiple frequency sweeps and two-frequency irradiation [24,25]. The NQDR spectrometer and the experimental procedures are described in details in two previous papers [26,27].…”