[The study of induced circular dichroism of phenylalanine bridged metal bis-porphyrin].
L- and D-phenylalanine bridged zinc bis-porphyrin with the connecting chain at ortho and para position of two phenyl rings [o,o-C2-Phe-C2-(TPP)2Zn2 and p,p-C2-Phe-C2-(TPP)2Zn2] have been synthesized and characterized. o,o-C2-Phe-C2-(TPP)2Zn2 exhibited strong induced circular dichroism (ICD). While p,p-C2-Phe-C2-(TPP)2Zn2 exhibited no significant ICD. The ICD of present complexes were mainly determined by the pi-pi interaction and chiral excition coupling between two porphyrin moieties of the molecules. Our results also indicated that the existence of chiral center in a porphyrin molecule does not mean it would surely exhibit ICD.
Liu
H
H
Department of Applied Chemistry, South China University of Technology, 510640 Guangzhou.
Ying
X
X
Hu
X
X
Liu
Y
Y
Huang
J
J
Huang
J
J
Ji
L
L
Yao
Z
Z
Zhang
J
J
D002614:Chelating Agents; D002942:Circular Dichroism / Q000379:methods; D008665:Metalloporphyrins / Q000032:analysis / Q000737:chemistry*; D015394:Molecular Structure; D010649:Phenylalanine / Q000032:analysis / Q000737:chemistry*; D013237:Stereoisomerism
D002614:Chelating Agents; D008665:Metalloporphyrins; C017802:zinc hematoporphyrin; D010649:Phenylalanine