Polarized reflectivity spectra of stretch-oriented poly(p-phenylene-vinylene)

D. Comoretto; G. Dellepiane; D. Moses; J. Cornil; D. A. Dos Santos; J. L. Brédas

doi:10.1016/S0009-2614(98)00319-4

Polarized reflectivity spectra of stretch-oriented poly(p-phenylene-vinylene)

D. Comoretto
, G. Dellepiane
, D. Moses
, J. Cornil
, D. A. Dos Santos
, J. L. Brédas

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

31 Scopus citations

Abstract

We report polarized, near-normal incidence, absolute reflectivity spectra of highly stretch-oriented unsubstituted poly(p-phenylene-vinylene). The data show a well-resolved vibronic progression in the lowest optical transition, a high dichroic ratio and weak signals due to conjugated segments with reduced effective conjugation length. On the high-energy side of the spectra, other transitions mainly related to excited states involving localized levels are detected. The low-temperature spectra confirm these assignments. The polarization properties of the reflectivity spectra are discussed in relation to correlated quantum-chemical calculations.

Original language	English (US)
Pages (from-to)	1-7
Number of pages	7
Journal	Chemical Physics Letters
Volume	289
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(98)00319-4
State	Published - Jun 5 1998
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(98)00319-4

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@article{e0d71f506cd94381ac9e3b790909188d,

title = "Polarized reflectivity spectra of stretch-oriented poly(p-phenylene-vinylene)",

abstract = "We report polarized, near-normal incidence, absolute reflectivity spectra of highly stretch-oriented unsubstituted poly(p-phenylene-vinylene). The data show a well-resolved vibronic progression in the lowest optical transition, a high dichroic ratio and weak signals due to conjugated segments with reduced effective conjugation length. On the high-energy side of the spectra, other transitions mainly related to excited states involving localized levels are detected. The low-temperature spectra confirm these assignments. The polarization properties of the reflectivity spectra are discussed in relation to correlated quantum-chemical calculations.",

author = "D. Comoretto and G. Dellepiane and D. Moses and J. Cornil and \{Dos Santos\}, \{D. A.\} and Br{\'e}das, \{J. L.\}",

note = "Funding Information: We thank Dr. T. Ohnishi and Dr. T. Noguchi for providing us with the PPV samples. The work in Genova is supported by the Italian Ministry of University and of Scientific and Technological Research (MURST), and by the National Research Council (CNR), Italy. We thank the Optical Spectroscopy Laboratory of the INFM unit at the Department of Physics `A. Volta', University of Pavia, for the instrumental facilities used in the present work. The work in Mons is partly supported by the `P{\^o}le d'Attraction Interuniversitaire en Chimie Supramol{\'e}culaire et Catalyse Supramol{\'e}culaire (PAI 4/11)', the Belgian National Fund for Scientific Research FNRS/FRFC and an IBM Academic Joint Study. JC is Charg{\'e} de Recherches of the FNRS.",

year = "1998",

month = jun,

day = "5",

doi = "10.1016/S0009-2614(98)00319-4",

language = "English (US)",

volume = "289",

pages = "1--7",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Polarized reflectivity spectra of stretch-oriented poly(p-phenylene-vinylene)

AU - Comoretto, D.

AU - Dellepiane, G.

AU - Moses, D.

AU - Cornil, J.

AU - Dos Santos, D. A.

AU - Brédas, J. L.

N1 - Funding Information: We thank Dr. T. Ohnishi and Dr. T. Noguchi for providing us with the PPV samples. The work in Genova is supported by the Italian Ministry of University and of Scientific and Technological Research (MURST), and by the National Research Council (CNR), Italy. We thank the Optical Spectroscopy Laboratory of the INFM unit at the Department of Physics `A. Volta', University of Pavia, for the instrumental facilities used in the present work. The work in Mons is partly supported by the `Pôle d'Attraction Interuniversitaire en Chimie Supramoléculaire et Catalyse Supramoléculaire (PAI 4/11)', the Belgian National Fund for Scientific Research FNRS/FRFC and an IBM Academic Joint Study. JC is Chargé de Recherches of the FNRS.

PY - 1998/6/5

Y1 - 1998/6/5

N2 - We report polarized, near-normal incidence, absolute reflectivity spectra of highly stretch-oriented unsubstituted poly(p-phenylene-vinylene). The data show a well-resolved vibronic progression in the lowest optical transition, a high dichroic ratio and weak signals due to conjugated segments with reduced effective conjugation length. On the high-energy side of the spectra, other transitions mainly related to excited states involving localized levels are detected. The low-temperature spectra confirm these assignments. The polarization properties of the reflectivity spectra are discussed in relation to correlated quantum-chemical calculations.

AB - We report polarized, near-normal incidence, absolute reflectivity spectra of highly stretch-oriented unsubstituted poly(p-phenylene-vinylene). The data show a well-resolved vibronic progression in the lowest optical transition, a high dichroic ratio and weak signals due to conjugated segments with reduced effective conjugation length. On the high-energy side of the spectra, other transitions mainly related to excited states involving localized levels are detected. The low-temperature spectra confirm these assignments. The polarization properties of the reflectivity spectra are discussed in relation to correlated quantum-chemical calculations.

UR - https://www.scopus.com/pages/publications/0002646865

UR - https://www.scopus.com/pages/publications/0002646865#tab=citedBy

U2 - 10.1016/S0009-2614(98)00319-4

DO - 10.1016/S0009-2614(98)00319-4

M3 - Article

AN - SCOPUS:0002646865

SN - 0009-2614

VL - 289

SP - 1

EP - 7

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

Polarized reflectivity spectra of stretch-oriented poly(p-phenylene-vinylene)

Abstract

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