Two novel fluorescent calix[4]arene derivatives with benzoazole units in 1,3-alternate conformation for selective recognition to Fe^(3+) and Cr^(3+)

Two novel fluorescent calix[4]arene derivatives la and lb with benzoxazole or benzothiazole units in 1,3-alternate conformation have been synthesized and characterized by IR, ^1H NMR, ^13C NMR and MS. Their complexation properties to different heavy and transition metal ions have been studied by UV-vis spectroscopy and fluorescence spectrometer. Compounds 1a and 1b show selective recognition to Fe^3＋ and Cr^3＋.

Novel synthesis of N-substituted-calix[4]azacrown derivatives

A novel series of calix[4]azacrown derivatives with the reaction between calix[4]azacrown and the different fluorophore derivatives,which may be useful fluorescent receptors,have been synthesized and structurally characterized by IR,~1H NMR,^（13）C NMR and MS.From their analysis data,it was found those compounds adopted a cone conformation.

Synthesis and characterization of a novel series of unsymmetrical porphyrins

A novel series of unsymmetrical porphyrins with aldehyde group at the terminal of the linkage which connected to meso-phenyl through acylamide bond have been synthesized and structurally characterized by IR, (1)H NMR, MS, UV–vis, fluorescence.

Synthesis and Spectroscopic Investigation of Azoporphyrins

The synthesis of a series of new covalently-connected azoporphyrin derivatives is described and the photochemical properties of the new compounds are discussed. The two chromophores of these derivatives exhibit their absorption spectroscopic properties respectively. In the fluorescence emission spectra, intermolecular fluorescence quenching is detected.

The facile synthesis of 5-formylporphyrin

A facile synthetic route of 5-formylporphyrin（2） has been developed.Using pyrrole and pivaldehyde as the starting materials,2 was obtained through several facile reactions.The synthetic route is easy to perform and can be scaled up,which gives the compound a better application perspective.