124411-19-4Relevant academic research and scientific papers
Binding properties of p-(phenylazo)calixarenes for metal ions
Nomura,Taniguchi,Otsuji
, p. 3797 - 3801 (1993)
The binding properties of p-(phenylzao)calis[n]arenes (n=6 and n=4) for metal ions have been studied. The calixarenes show a highly selective binding ability toward Ag+, Hg+, and Hg2+. This property can be explained in terms of a metal ion-induced azo/hydrazone tautomerism. The Ag+ ion forms complexes with the azocalixarenes by binding with their hydrazone tautomers.
Autoaccelerative Diazo Coupling with Calixarene: Substituent Effects on the Unusual Co-operativity of the OH Groups
Shinkai, Seiji,Araki, Koji,Shibata, Jiro,Tsugawa, Daisuke,Manabe, Osamu
, p. 3333 - 3337 (2007/10/02)
Diazo coupling between calixarene and five substituted benzenediazonium ions in tetrahydrofuran at 5 deg C in the presence of pyridine afforded the tetrasubstituted calixarenes as main products and small amounts of mono-, di- and tri-substituted cal
Diazo-Coupling Reactions with Calixarene. pKa Determination with Chromophoric Azocalixarenes
Shinkai, Seiji,Araki, Koji,Shibata, Jiro,Tsugawa, Daisuke,Manabe, Osamu
, p. 931 - 934 (2007/10/02)
Six azocalixarenes were synthesized for the first time by diazo-coupling reactions with calixarene.The products showed unusual spectral properties including an azophenol - quinine-hydrazone tautomerism.Owing to the chromophoric nature, the four pKs
