A series of aromatic aldehydes was examined as substrates for salivary aldehyde dehydrogenase (sALDH) and the recombinant ALDH3A1. Para-substituted benzaldehydes, cinnamicaldehyde and 2-naphthaldehydes were found to be excellent substrates, and kinetic parameters for both salivary and recombinant ALDH were nearly identical. It was demonstrated that for the fluorogenic naphthaldehydes the only produced
Aromatic plane effect study in pseudorotaxane construction between ‘Texas-sized’ molecular box and carboxylate anions
作者:Feng Tang、Rui Cao、Han-Yuan Gong
DOI:10.1016/j.tetlet.2014.12.111
日期:2015.2
This study focused on the aromatic plane effect of the binding modes between 'Texas-sized' molecular box and carboxylate anion species. The molecular box, namely cyclo[2](2,6-di(1H-imidazol-1-yl)pyridine)-[2](1,4-dimethylenebenzene) (1(4+); studied as the PF6- salt), easily constructs interpenetrated structures (i.e., pseudorotaxanes) with carboxylate anions via the introduction of aromatic rings. As revealed by H-1 NMR titration, two-dimensional nuclear Overhauser effect spectroscopy (NOESY), UV-Vis spectroscopic study, and electrospray ionization mass spectrometry (ESI-MS), the determination effect of aromatic plane in the binding modes between 1(4+) and carboxylate anions was studied in detail. This research reveals the important role of aromatic plane substitute groups on anions for building anion-induced interpenetrated self-assembly structures. (C) 2015 Published by Elsevier Ltd.