Biphenyl-strapped diphenylporphyrins: synthesis and spectroscopic characterization of a series of porphyrins with ether-linked straps. Preliminary CO binding properties of their iron(II) derivatives

The synthesis and spectroscopic characterization of a series of porphyrins with ether-linked straps are presented. The biphenyl straps used were linked via their 3,3'-positions by SCH2O groups to orthopositions of the phenyl rings of the 5,15-diphenylporphyrins. The conformational properties and the electronic spectral properties of the strapped porphyrins were examined using 1H NMR spectroscopy. Also, the synthesis, structures and properties of ferrous carbonyl adducts of these porphyrins are presented and discussed.