Electron photoejection from dianion of an expanded phthalocyanine

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

doi:10.1142/S1088424618500359

Electron photoejection from dianion of an expanded phthalocyanine

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	437-442
Number of pages	6
Journal	Journal of Porphyrins and Phthalocyanines
Volume	22
Issue number	5
DOIs	https://doi.org/10.1142/S1088424618500359
Publication status	Published - 2018 May 1

Bibliographical note

Publisher Copyright:
© 2018 World Scientific Publishing Company.

All Science Journal Classification (ASJC) codes

Chemistry(all)

Access to Document

10.1142/S1088424618500359

Cite this

@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",

note = "Publisher Copyright: {\textcopyright} 2018 World Scientific Publishing Company.",

year = "2018",

month = may,

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",

}

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

AN - SCOPUS:85044475388

SN - 1088-4246

VL - 22

SP - 437

EP - 442

JO - Journal of Porphyrins and Phthalocyanines

JF - Journal of Porphyrins and Phthalocyanines

IS - 5

ER -

Electron photoejection from dianion of an expanded phthalocyanine

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this