Azocalixarenes: Synthesis, Characterization, Complexation, Extraction, Absorption Properties and Thermal Behaviours

Comparative Study of Influences of Gamma Rays on Calix[4]Arene and 25,27-di(4-Nitrobenzyl)-26,28-Dihydroxycalix[4]Arene: EPR Study

“…One type of radical was produced in calix [4]arene labeled calix [4]arene(1), two types of radicals were produced in 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix [4]arene labeled calix [4]arene (2). The EPR spectra were recorded in the temperature range of 273-400 K. The numbers and the intensity values of the lines in the spectra of calix [4]arene(1) and calix [4]arene (2) did not change with the increasing temperature (273-400 K).…”

“…The EPR spectra were recorded in the temperature range of 273-400 K. The numbers and the intensity values of the lines in the spectra of calix [4]arene(1) and calix [4]arene (2) did not change with the increasing temperature (273-400 K). It was also observed that the color of the irradiated calix [4]arene (2) has changed from white to yellow at room temperature, but the color of the irradiated calix [4]arene(1) did not change. According to the results obtained from analysis of the spectra, it can be said that calix [4]arene derivatives are less resistant to irradiation.…”

“…These compounds, appropriately designed, have exhibited a large variety of functions, such as selective complexing agents for metal ions and catalysts [2]. Calixarenes are macrocycles with a high degree of preorganization.…”

Characterization of polypyrrole/azocalix[4]arene salts: Electrical properties and thermal stability

“…Azocalixarenes, which are generated by the insertion of nitrogen atoms into the p-position unit of the calixarene structure, have several isomers based on the position of the nitrogen atoms and the ring size. 7 Recently, the inclusion of cage molecules into electroconducting polymers, ECPs, has opened new perspectives of application for the construction of ionic sensors. It is noted that sulfonated calixarenes can be immobilized in conducting polymers like PPy as dopants during electropolymerization.…”

“…The first weight loss at 154 C exhibits to volatile DMF (synthesis solvent) released from the lattice compound. 7 The last two steps at 303 and 503 C attributes to decomposed azo groups in azocalix [4]arene structure.…”