... of the resultant compounds is elucidated on the basis of IR, 1 H- and 13 C-NMR spectroscopy, mass spectrometry and ... Open Access. Article: Organically Modified Silica with Pyrazole-3- carbaldehyde as a New Sorbent for Solid-Liquid Extraction of ... Molecules 2014, 19(1), 247-262 ...