The lowest excited triplet states of lanthanide bisphthalocyanine complexes studied by time resolved electron paramagnetic resonance

Seigo Yamauchi; Hideo Konami; Kimio Akiyama; Masahiro Hatano; Masamoto Iwaizumi

doi:10.1080/00268979400101291

The lowest excited triplet states of lanthanide bisphthalocyanine complexes studied by time resolved electron paramagnetic resonance

Seigo Yamauchi, Hideo Konami, Kimio Akiyama, Masahiro Hatano, Masamoto Iwaizumi

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18 Citations (Scopus)

Abstract

Interplanar interactions were analysed for metal bridged phthalocyanine dimers, [NBu₄][M(III)Pc₂](M = Y, Yb and Lu), by using zero field splitting (ZFS) parameters in the Tj states. The observed ZFS D and a triplet lifetime decreased remarkably due to dimerization. From a comparison of D between the monomer and the dimer the interplanar interactions are divided into two types: Exciton and charge resonance. It is found that nearly 50% of the charge resonance contribution (b²) is involved in the T₁ state of LuPc^‒₂. The correlations between b², the triplet lifetime and the ionic radius of the central metal are discussed in terms of the charge resonance interaction.

Original language	English
Pages (from-to)	335-344
Number of pages	10
Journal	Molecular Physics
Volume	83
Issue number	2
DOIs	https://doi.org/10.1080/00268979400101291
Publication status	Published - 1994 Oct 10
Externally published	Yes

ASJC Scopus subject areas

Biophysics
Molecular Biology
Condensed Matter Physics
Physical and Theoretical Chemistry

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10.1080/00268979400101291

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title = "The lowest excited triplet states of lanthanide bisphthalocyanine complexes studied by time resolved electron paramagnetic resonance",

abstract = "Interplanar interactions were analysed for metal bridged phthalocyanine dimers, [NBu4][M(III)Pc2](M = Y, Yb and Lu), by using zero field splitting (ZFS) parameters in the Tj states. The observed ZFS D and a triplet lifetime decreased remarkably due to dimerization. From a comparison of D between the monomer and the dimer the interplanar interactions are divided into two types: Exciton and charge resonance. It is found that nearly 50% of the charge resonance contribution (b2) is involved in the T1 state of LuPc‒2. The correlations between b2, the triplet lifetime and the ionic radius of the central metal are discussed in terms of the charge resonance interaction.",

author = "Seigo Yamauchi and Hideo Konami and Kimio Akiyama and Masahiro Hatano and Masamoto Iwaizumi",

note = "Funding Information: This work was supported by Grants-in-Aid for Scientific Research in Priority Areas 'Molecular Magnetism' (Area NO. 288/05226205 and 05226206) and on Priority Areas 'New Development of Rare Earth Complexes' (No. 251 and 06241204), and for Scientific Research No. 03554014 from the Ministry of Education, Science and Culture, Japan.",

year = "1994",

month = oct,

day = "10",

doi = "10.1080/00268979400101291",

language = "English",

volume = "83",

pages = "335--344",

journal = "Molecular Physics",

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T1 - The lowest excited triplet states of lanthanide bisphthalocyanine complexes studied by time resolved electron paramagnetic resonance

AU - Yamauchi, Seigo

AU - Konami, Hideo

AU - Akiyama, Kimio

AU - Hatano, Masahiro

AU - Iwaizumi, Masamoto

N1 - Funding Information: This work was supported by Grants-in-Aid for Scientific Research in Priority Areas 'Molecular Magnetism' (Area NO. 288/05226205 and 05226206) and on Priority Areas 'New Development of Rare Earth Complexes' (No. 251 and 06241204), and for Scientific Research No. 03554014 from the Ministry of Education, Science and Culture, Japan.

PY - 1994/10/10

Y1 - 1994/10/10

N2 - Interplanar interactions were analysed for metal bridged phthalocyanine dimers, [NBu4][M(III)Pc2](M = Y, Yb and Lu), by using zero field splitting (ZFS) parameters in the Tj states. The observed ZFS D and a triplet lifetime decreased remarkably due to dimerization. From a comparison of D between the monomer and the dimer the interplanar interactions are divided into two types: Exciton and charge resonance. It is found that nearly 50% of the charge resonance contribution (b2) is involved in the T1 state of LuPc‒2. The correlations between b2, the triplet lifetime and the ionic radius of the central metal are discussed in terms of the charge resonance interaction.

AB - Interplanar interactions were analysed for metal bridged phthalocyanine dimers, [NBu4][M(III)Pc2](M = Y, Yb and Lu), by using zero field splitting (ZFS) parameters in the Tj states. The observed ZFS D and a triplet lifetime decreased remarkably due to dimerization. From a comparison of D between the monomer and the dimer the interplanar interactions are divided into two types: Exciton and charge resonance. It is found that nearly 50% of the charge resonance contribution (b2) is involved in the T1 state of LuPc‒2. The correlations between b2, the triplet lifetime and the ionic radius of the central metal are discussed in terms of the charge resonance interaction.

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JO - Molecular Physics

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IS - 2

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The lowest excited triplet states of lanthanide bisphthalocyanine complexes studied by time resolved electron paramagnetic resonance

Abstract

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