High-performance liquid chromatography with electrospray ionisation mass spectrometry and diode array detection in the identification and quantification of the degradation products of calix[4]arene crown-6 under radiolysis

Radiolysis of alkyl substituted tridentate 2,6-bis(1,2,4-triazine-3-yl)pyridines: an experimental study with DFT validation

The radiolysis products of alkyl substituted tridentate 2,6-bis(1,2,4-triazine-3-yl)pyridines (BTPs) were studied by an experimental study with DFT validation.

Study of the nitration of di-n-octylcrown-6 calix[4]arene using LC–MS, NMR, and molecular modelling

The selective HNO3 nitration of di-n-octylcrown-6 calix[4]arene using different conditions, studied with LC–MS and NMR (1H and 13C) spectroscopic techniques, lead to the identification of most of the expected nitro derivative isomeric compounds. The formation of these isomers under acidic and radiolytic conditions is discussed with the help of molecular modelling.Key words: calix crown compounds, nitration of calixarenes, NMR of isomeric nitrocalixarenes, LC-ESI-MS.

On the synthesis of new amphiphilic entities by the succinic coupling of β-cyclodextrins to calixarenes

Novel molecules, composed of a β-cyclodextrin coupled via a succinic diamide linker to di-n-octyl-calix[4]arene monocrown-6 or to biscrown-6-calix[4]arene, were synthesized by two independent routes: from mono-6′-deoxy-6′-amino-β-cyclodextrin, and from tetraaminocalix[4]arene derivatives. Key words: β-cyclodextrin–calix[4]arene coupling, aminosuccinate-β-CD, aminosuccinate-calix[4]arene, octyloxy-calix[4]arene–monocrown-6, calix[4]arene–biscrown-6.