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 journalArticle

Abstract

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
Volume22
Issue number5
DOIs
Publication statusPublished - 2018 May 1

Fingerprint

Anions
Absorption spectra
Electrons
Photoexcitation
Reducing Agents
Photoelectrons
Absorption spectroscopy
phthalocyanine

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Koo, Yun Hee ; Yanagisawa, Ryo ; Cha, Won Young ; Furuyama, Taniyuki ; Kobayashi, Nagao ; Kim, Dongho. / Electron photoejection from dianion of an expanded phthalocyanine. In: Journal of Porphyrins and Phthalocyanines. 2018 ; Vol. 22, No. 5. pp. 437-442.
@article{ee9c589fde3f47bc85a4e7d603226de5,
title = "Electron photoejection from dianion of an expanded phthalocyanine",
abstract = "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.",
author = "Koo, {Yun Hee} and Ryo Yanagisawa and Cha, {Won Young} and Taniyuki Furuyama and Nagao Kobayashi and Dongho Kim",
year = "2018",
month = "5",
day = "1",
doi = "10.1142/S1088424618500359",
language = "English",
volume = "22",
pages = "437--442",
journal = "Journal of Porphyrins and Phthalocyanines",
issn = "1088-4246",
publisher = "Society of Porphyrins and Phthalocyanines (SPP)",
number = "5",

}

Electron photoejection from dianion of an expanded phthalocyanine. / Koo, Yun Hee; Yanagisawa, Ryo; Cha, Won Young; Furuyama, Taniyuki; Kobayashi, Nagao; Kim, Dongho.

In: Journal of Porphyrins and Phthalocyanines, Vol. 22, No. 5, 01.05.2018, p. 437-442.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron photoejection from dianion of an expanded phthalocyanine

AU - Koo, Yun Hee

AU - Yanagisawa, Ryo

AU - Cha, Won Young

AU - Furuyama, Taniyuki

AU - Kobayashi, Nagao

AU - Kim, Dongho

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85044475388&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044475388&partnerID=8YFLogxK

U2 - 10.1142/S1088424618500359

DO - 10.1142/S1088424618500359

M3 - Article

VL - 22

SP - 437

EP - 442

JO - Journal of Porphyrins and Phthalocyanines

JF - Journal of Porphyrins and Phthalocyanines

SN - 1088-4246

IS - 5

ER -