Electron photoejection from dianion of an expanded phthalocyanine

Yun Hee Koo, Ryo Yanagisawa, Won Young Cha, Taniyuki Furuyama, Nagao Kobayashi, Dongho Kim

Research output: Contribution to journalArticlepeer-review


Photoelectron ejection from the dianion of pentabenzotriazasmaragdyrin (PBTAS) which is an expanded phthalocyanine, is observed using femtosecond transient absorption spectroscopy. The PBTAS dianion was produced by chemical reduction using excess cobaltocene as a reductant, which was confirmed by their steady-state absorption spectrum as compared to the absorption spectrum obtained by electrochemical reduction, and characterized by magnetic circular dichroism (MCD). Upon photoexcitation of the PBTASdianion, the generation of a radical anion was confirmed by the characteristic absorption peaks that are observed at 950 and 1000 nm. The radical anion was relaxed to form a dianion with a time constant of 0.7 ps.

Original languageEnglish
Pages (from-to)437-442
Number of pages6
JournalJournal of Porphyrins and Phthalocyanines
Issue number5
Publication statusPublished - 2018 May 1

Bibliographical note

Publisher Copyright:
© 2018 World Scientific Publishing Company.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)


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