Time-resolved resonance Raman spectra of octaethylporphinato copper(II) in the lowest excited triplet state

✍ Scribed by Motoko Asano-Someda; Katsuhiro Aoyagi; Teizo Kitagawa

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 491 KB
• Volume: 257
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00578-7

✦ Synopsis

Time-resolved resonance Raman spectra were observed with the pump/probe technique using two 7 ns pulsed lasers for octaethylporphinato Cu(II) [(OEP)Cu] and its isotopomers (OEP-meso-d 4 and OEP-lSN) in the lowest excited triplet state. Raman bands were assigned on the basis of depolarization ratios and isotope shifts. Then v 2, v 3 and v 4 modes of the macrocycle in the T l state were shifted to lower frequencies by 7, 37 and 57 cm-1, respectively, compared with those of the ground state, but the peripheral ethyl internal modes were shifted little. The porphyrin skeletal modes exhibited significant broadening in the T I state but the ethyl modes did not.