Strong magneto chiral effects in absorption of phenylalanine bridged chiral zinc bis porphyrin O,O C 2 Phe C 2 (TPP) 2Zn 2 were demonstrated through the comparison of natural circular dichroism and magnetic circular dichroism spectra of enantiomers. Magneto chiral circular dichroism spectra expressed as difference between the absorption coefficients of the left circularly polarized and right circularly polarized light are given. The observed intensive magneto chiral effect was suggested to be related with the chiral exciton coupling between two zinc porphyrin chromophores of the enantiomers. [WT5HZ]
Homogeneous solution of poor soluble aza bridged bis phenanthroline macrocyclic compound(H 2HAPP) was obtained by adding K 2CO 3 to its trifluoroacetate in CH 3OH CH 2Cl 2[ V (CH 3OH)∶ V (CH 2Cl 2)= 1∶1] solution. Coordination reaction between H 2HAPP and metal ion Zn(Ⅱ) in CH 3OH CH 2Cl 2[ V (CH 3OH)∶ V (CH 2Cl 2)=1∶1] solvent was studied by UV Vis spectroscopic method, which indicated 1∶1 complexing between H 2HAPP and Zn(II) ion occurred easily in such a homogeneous system at room temperature. And the formation of ZnHAPP complex was further confirmed by FAB MS and 1H NMR spectra.
