supported by the Nationa1 Natural Science Foundation of China(Grant Nos.20072041 and 20133020);the State Kcy Basis Research and Development Plans(Grant No.G1998010100).
The photophysical properties of ortho-Cl, meta-Cl and para-Cl substituted tetraphenylporphy-rin-histidine and their zinc (Ⅱ) complexes have been studied by means of steady-state absorption and fluo-rescence spectrosc...