Experimental determination of ionization potentials of tetraphenylporphine and metallotetraphenylporphines

✍ Scribed by Yoshihiro Nakato; Koichi Abe; Hiroshi Tsubomura

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 313 KB
• Volume: 39
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(76)80095-4

✦ Synopsis

Gas-phase ioniation potentials of tetraphenylporphine and some metallotetraphenylporphines have been determined by the method of photocurrent measurements in nonpolar solvents reported previously [ 11. The values obtained range from 5.9 to 6.3 eV, depending on the central metal ion, correlating weti with the reported polarographic oxidation potenti&. It hns been concluded that photoelectron ejection from these complexes in isooctane occurs from the porphyrin a-system in all QSCS inciudiq Co(li) tetraphanylporphine, in which the electron is thou&t to be removed from the meta in polar solvents.