Lattice relaxation in linear polyenes

Z. Shuai; J. L. Bredas

Lattice relaxation in linear polyenes

Z. Shuai^*, J. L. Bredas

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present a multi-phonon approach to analyze the lattice relaxation in the first B_u excited state of linear polyenes, from trans-butadiene to polyacetylene. Photo-absorption experiments carried out on a series of linear polyenes, β-carotene, polyenals/polyenones, and polyacetylene are discussed. The Huang-Rhys factor S and the relaxation energy are calculated for polyenes with various lengths. A major result is that we find that the S value first tends to decrease with increasing chain length but after some critical length the evolution completely modifies and S starts increasing. We therefore caution that extrapolations based on observations on short polyenes might be invalid for the polymer.

Original language	English (US)
Pages (from-to)	4479-4484
Number of pages	6
Journal	Synthetic Metals
Volume	57
Issue number	2 -3 pt 6
State	Published - Jan 1 1993
Externally published	Yes
Event	Proceedings of the International Conferece on Science and Technology of Synthetic Metals - Goteborg, Swed Duration: Aug 12 1992 → Aug 18 1992

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Cite this

@article{9578ecac286a4db7bd2fb431c407d4a3,

title = "Lattice relaxation in linear polyenes",

abstract = "We present a multi-phonon approach to analyze the lattice relaxation in the first Bu excited state of linear polyenes, from trans-butadiene to polyacetylene. Photo-absorption experiments carried out on a series of linear polyenes, β-carotene, polyenals/polyenones, and polyacetylene are discussed. The Huang-Rhys factor S and the relaxation energy are calculated for polyenes with various lengths. A major result is that we find that the S value first tends to decrease with increasing chain length but after some critical length the evolution completely modifies and S starts increasing. We therefore caution that extrapolations based on observations on short polyenes might be invalid for the polymer.",

author = "Z. Shuai and Bredas, {J. L.}",

year = "1993",

month = jan,

day = "1",

language = "English (US)",

volume = "57",

pages = "4479--4484",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier",

number = "2 -3 pt 6",

note = "Proceedings of the International Conferece on Science and Technology of Synthetic Metals ; Conference date: 12-08-1992 Through 18-08-1992",

}

TY - JOUR

T1 - Lattice relaxation in linear polyenes

AU - Shuai, Z.

AU - Bredas, J. L.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - We present a multi-phonon approach to analyze the lattice relaxation in the first Bu excited state of linear polyenes, from trans-butadiene to polyacetylene. Photo-absorption experiments carried out on a series of linear polyenes, β-carotene, polyenals/polyenones, and polyacetylene are discussed. The Huang-Rhys factor S and the relaxation energy are calculated for polyenes with various lengths. A major result is that we find that the S value first tends to decrease with increasing chain length but after some critical length the evolution completely modifies and S starts increasing. We therefore caution that extrapolations based on observations on short polyenes might be invalid for the polymer.

AB - We present a multi-phonon approach to analyze the lattice relaxation in the first Bu excited state of linear polyenes, from trans-butadiene to polyacetylene. Photo-absorption experiments carried out on a series of linear polyenes, β-carotene, polyenals/polyenones, and polyacetylene are discussed. The Huang-Rhys factor S and the relaxation energy are calculated for polyenes with various lengths. A major result is that we find that the S value first tends to decrease with increasing chain length but after some critical length the evolution completely modifies and S starts increasing. We therefore caution that extrapolations based on observations on short polyenes might be invalid for the polymer.

UR - http://www.scopus.com/inward/record.url?scp=0027578995&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0027578995

SN - 0379-6779

VL - 57

SP - 4479

EP - 4484

JO - Synthetic Metals

JF - Synthetic Metals

IS - 2 -3 pt 6

T2 - Proceedings of the International Conferece on Science and Technology of Synthetic Metals

Y2 - 12 August 1992 through 18 August 1992

ER -

Lattice relaxation in linear polyenes

Abstract

ASJC Scopus subject areas

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