Resolving the radical cation formation from the lowest-excited singlet (S-1) state of terthiophene in a TiO2-SiO2 hybrid polymer matrix

M Helbig; A Ruseckas; MML Grage; E Birckner; S Rentsch; null Sundstrom

Resolving the radical cation formation from the lowest-excited singlet (S-1) state of terthiophene in a TiO2-SiO2 hybrid polymer matrix

M Helbig, A Ruseckas, MML Grage, E Birckner, S Rentsch, Sundstrom

School of Physics and Astronomy

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

Abstract

Photoexcitation dynamics of terthiophene (3T) molecules incorporated in an organic-inorganic matrix containing titanium in the network are investigated by polarized transient absorption with femtosecond time resolution. We observed the decay of excited-state absorption of neutral 3T and simultaneous rise of 3T(-)(+.) radical cation absorption. The observed kinetics of electron transfer are independent of excess vibrational energy in the S-1 state, and can be described by a biexponential function with time constants of similar to 1 ps (for similar to 62% of the excited 3T molecules) and similar to 8 ps (for similar to 33%). The angle between the S-1

Original language	English
Pages (from-to)	587-594
Number of pages	8
Journal	Chemical Physics Letters
Volume	302
Issue number	5-6
Publication status	Published - 26 Mar 1999

Keywords

LIGHT-EMITTING-DIODES
THIOPHENE OLIGOMERS
PHOTOCHEMICAL GENERATION
CONJUGATED POLYMERS
CHARGE SEPARATION
ELECTRON-TRANSFER
OLIGOTHIOPHENES
SPECTROSCOPY
ABSORPTION
ULTRAFAST

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title = "Resolving the radical cation formation from the lowest-excited singlet (S-1) state of terthiophene in a TiO2-SiO2 hybrid polymer matrix",

abstract = "Photoexcitation dynamics of terthiophene (3T) molecules incorporated in an organic-inorganic matrix containing titanium in the network are investigated by polarized transient absorption with femtosecond time resolution. We observed the decay of excited-state absorption of neutral 3T and simultaneous rise of 3T(-)(+.) radical cation absorption. The observed kinetics of electron transfer are independent of excess vibrational energy in the S-1 state, and can be described by a biexponential function with time constants of similar to 1 ps (for similar to 62% of the excited 3T molecules) and similar to 8 ps (for similar to 33%). The angle between the S-1",

keywords = "LIGHT-EMITTING-DIODES, THIOPHENE OLIGOMERS, PHOTOCHEMICAL GENERATION, CONJUGATED POLYMERS, CHARGE SEPARATION, ELECTRON-TRANSFER, OLIGOTHIOPHENES, SPECTROSCOPY, ABSORPTION, ULTRAFAST",

author = "M Helbig and A Ruseckas and MML Grage and E Birckner and S Rentsch and Sundstrom",

year = "1999",

month = mar,

day = "26",

language = "English",

volume = "302",

pages = "587--594",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier Science BV",

number = "5-6",

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TY - JOUR

T1 - Resolving the radical cation formation from the lowest-excited singlet (S-1) state of terthiophene in a TiO2-SiO2 hybrid polymer matrix

AU - Helbig, M

AU - Ruseckas, A

AU - Grage, MML

AU - Birckner, E

AU - Rentsch, S

AU - Sundstrom, null

PY - 1999/3/26

Y1 - 1999/3/26

N2 - Photoexcitation dynamics of terthiophene (3T) molecules incorporated in an organic-inorganic matrix containing titanium in the network are investigated by polarized transient absorption with femtosecond time resolution. We observed the decay of excited-state absorption of neutral 3T and simultaneous rise of 3T(-)(+.) radical cation absorption. The observed kinetics of electron transfer are independent of excess vibrational energy in the S-1 state, and can be described by a biexponential function with time constants of similar to 1 ps (for similar to 62% of the excited 3T molecules) and similar to 8 ps (for similar to 33%). The angle between the S-1

AB - Photoexcitation dynamics of terthiophene (3T) molecules incorporated in an organic-inorganic matrix containing titanium in the network are investigated by polarized transient absorption with femtosecond time resolution. We observed the decay of excited-state absorption of neutral 3T and simultaneous rise of 3T(-)(+.) radical cation absorption. The observed kinetics of electron transfer are independent of excess vibrational energy in the S-1 state, and can be described by a biexponential function with time constants of similar to 1 ps (for similar to 62% of the excited 3T molecules) and similar to 8 ps (for similar to 33%). The angle between the S-1

KW - LIGHT-EMITTING-DIODES

KW - THIOPHENE OLIGOMERS

KW - PHOTOCHEMICAL GENERATION

KW - CONJUGATED POLYMERS

KW - CHARGE SEPARATION

KW - ELECTRON-TRANSFER

KW - OLIGOTHIOPHENES

KW - SPECTROSCOPY

KW - ABSORPTION

KW - ULTRAFAST

M3 - Article

SN - 0009-2614

VL - 302

SP - 587

EP - 594

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 5-6

ER -

Resolving the radical cation formation from the lowest-excited singlet (S-1) state of terthiophene in a TiO2-SiO2 hybrid polymer matrix

Abstract

Keywords

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