Photophysical properties of C 84 major isomers

Eric C. Booth; Sergei M. Bachilo; Mito Kanai; T. John S. Dennis; R. Bruce Weisman

doi:10.1021/jp071447y

Photophysical properties of C ₈₄ major isomers

Eric C. Booth, Sergei M. Bachilo, Mito Kanai, T. John S. Dennis, R. Bruce Weisman^*

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Photophysical properties of C ₈₄ isomers have been measured separately and compared. Intrinsic triplet state lifetimes at room temperature are found to differ dramatically: 4.5 μs, for the D _2d(II) isomer, 125 μs for C _s(a), and 640 μs for D ₂(IV). The triplet lifetime of D ₂(IV) C ₈₄ represents the second longest found to date among fullerenes. Measurements between 77 and 320 K reveal that the triplet decay kinetics of D _2d(II) is largely temperature- independent, whereas thermally activated channels dominate triplet decay in the D ₂(IV) isomer. Oxygen-quenching studies suggest that the T ₁ energy of D _2d(II) lies near 7600 cm ^-1 but that of D ₂(IV) exceeds 8000 cm ^-1. These results highlight the importance of isomeric separation in exploring the rich photophysics of higher fullerenes.

Original language	English
Pages (from-to)	17720-17724
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	48
DOIs	https://doi.org/10.1021/jp071447y
Publication status	Published - 6 Dec 2007
Externally published	Yes

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title = "Photophysical properties of C 84 major isomers",

abstract = "Photophysical properties of C 84 isomers have been measured separately and compared. Intrinsic triplet state lifetimes at room temperature are found to differ dramatically: 4.5 μs, for the D 2d(II) isomer, 125 μs for C s(a), and 640 μs for D 2(IV). The triplet lifetime of D 2(IV) C 84 represents the second longest found to date among fullerenes. Measurements between 77 and 320 K reveal that the triplet decay kinetics of D 2d(II) is largely temperature- independent, whereas thermally activated channels dominate triplet decay in the D 2(IV) isomer. Oxygen-quenching studies suggest that the T 1 energy of D 2d(II) lies near 7600 cm -1 but that of D 2(IV) exceeds 8000 cm -1. These results highlight the importance of isomeric separation in exploring the rich photophysics of higher fullerenes.",

author = "Booth, {Eric C.} and Bachilo, {Sergei M.} and Mito Kanai and Dennis, {T. John S.} and Weisman, {R. Bruce}",

year = "2007",

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journal = "Journal of Physical Chemistry C",

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TY - JOUR

T1 - Photophysical properties of C 84 major isomers

AU - Booth, Eric C.

AU - Bachilo, Sergei M.

AU - Kanai, Mito

AU - Dennis, T. John S.

AU - Weisman, R. Bruce

PY - 2007/12/6

Y1 - 2007/12/6

N2 - Photophysical properties of C 84 isomers have been measured separately and compared. Intrinsic triplet state lifetimes at room temperature are found to differ dramatically: 4.5 μs, for the D 2d(II) isomer, 125 μs for C s(a), and 640 μs for D 2(IV). The triplet lifetime of D 2(IV) C 84 represents the second longest found to date among fullerenes. Measurements between 77 and 320 K reveal that the triplet decay kinetics of D 2d(II) is largely temperature- independent, whereas thermally activated channels dominate triplet decay in the D 2(IV) isomer. Oxygen-quenching studies suggest that the T 1 energy of D 2d(II) lies near 7600 cm -1 but that of D 2(IV) exceeds 8000 cm -1. These results highlight the importance of isomeric separation in exploring the rich photophysics of higher fullerenes.

AB - Photophysical properties of C 84 isomers have been measured separately and compared. Intrinsic triplet state lifetimes at room temperature are found to differ dramatically: 4.5 μs, for the D 2d(II) isomer, 125 μs for C s(a), and 640 μs for D 2(IV). The triplet lifetime of D 2(IV) C 84 represents the second longest found to date among fullerenes. Measurements between 77 and 320 K reveal that the triplet decay kinetics of D 2d(II) is largely temperature- independent, whereas thermally activated channels dominate triplet decay in the D 2(IV) isomer. Oxygen-quenching studies suggest that the T 1 energy of D 2d(II) lies near 7600 cm -1 but that of D 2(IV) exceeds 8000 cm -1. These results highlight the importance of isomeric separation in exploring the rich photophysics of higher fullerenes.

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U2 - 10.1021/jp071447y

DO - 10.1021/jp071447y

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VL - 111

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 48

ER -

Photophysical properties of C ₈₄ major isomers

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