Low-lying two-photon excitations in poly(p-phenylene vinylene) and its derivatives

F. Guo; Z. Y. Shih

doi:10.1016/S0009-2614(03)00152-0

Low-lying two-photon excitations in poly(p-phenylene vinylene) and its derivatives

F. Guo, Z. Y. Shih

Department of Physics

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

We study the low-lying two-photon excited states in nonlinear optical processes in poly(p-phenylene vinylene) (PPV) and its derivatives. We find that, within the Pariser-Parr-Pople (PPP) model, the mA_g state in (unsubstituted) PPV is exactly the lowest two-photon excited state (i.e., the 2¹A_g⁺ state). Due to the breaking of charge-conjugation symmetry, the 2A_g in substituted PPVs, originating from the 1¹A_g^-, is weakly two-photon allowed, while the mA_g has its origin from the 2¹A_g⁺, hence giving a strong peak in the two-photon absorption spectra.

Original language	English
Pages (from-to)	572-577
Number of pages	6
Journal	Chemical Physics Letters
Volume	370
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(03)00152-0
Publication status	Published - 2003 Mar 14

Fingerprint

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Cite this

Guo, F., & Shih, Z. Y. (2003). Low-lying two-photon excitations in poly(p-phenylene vinylene) and its derivatives. Chemical Physics Letters, 370(3-4), 572-577. https://doi.org/10.1016/S0009-2614(03)00152-0

@article{77b9f45d73c441edb441c124a3ba267a,

title = "Low-lying two-photon excitations in poly(p-phenylene vinylene) and its derivatives",

abstract = "We study the low-lying two-photon excited states in nonlinear optical processes in poly(p-phenylene vinylene) (PPV) and its derivatives. We find that, within the Pariser-Parr-Pople (PPP) model, the mAg state in (unsubstituted) PPV is exactly the lowest two-photon excited state (i.e., the 21Ag+ state). Due to the breaking of charge-conjugation symmetry, the 2Ag in substituted PPVs, originating from the 11Ag-, is weakly two-photon allowed, while the mAg has its origin from the 21Ag+, hence giving a strong peak in the two-photon absorption spectra.",

author = "F. Guo and Shih, {Z. Y.}",

year = "2003",

month = "3",

day = "14",

doi = "10.1016/S0009-2614(03)00152-0",

language = "English",

volume = "370",

pages = "572--577",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Low-lying two-photon excitations in poly(p-phenylene vinylene) and its derivatives

AU - Guo, F.

AU - Shih, Z. Y.

PY - 2003/3/14

Y1 - 2003/3/14

N2 - We study the low-lying two-photon excited states in nonlinear optical processes in poly(p-phenylene vinylene) (PPV) and its derivatives. We find that, within the Pariser-Parr-Pople (PPP) model, the mAg state in (unsubstituted) PPV is exactly the lowest two-photon excited state (i.e., the 21Ag+ state). Due to the breaking of charge-conjugation symmetry, the 2Ag in substituted PPVs, originating from the 11Ag-, is weakly two-photon allowed, while the mAg has its origin from the 21Ag+, hence giving a strong peak in the two-photon absorption spectra.

AB - We study the low-lying two-photon excited states in nonlinear optical processes in poly(p-phenylene vinylene) (PPV) and its derivatives. We find that, within the Pariser-Parr-Pople (PPP) model, the mAg state in (unsubstituted) PPV is exactly the lowest two-photon excited state (i.e., the 21Ag+ state). Due to the breaking of charge-conjugation symmetry, the 2Ag in substituted PPVs, originating from the 11Ag-, is weakly two-photon allowed, while the mAg has its origin from the 21Ag+, hence giving a strong peak in the two-photon absorption spectra.

UR - http://www.scopus.com/inward/record.url?scp=0037436354&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037436354&partnerID=8YFLogxK

U2 - 10.1016/S0009-2614(03)00152-0

DO - 10.1016/S0009-2614(03)00152-0

M3 - Article

AN - SCOPUS:0037436354

VL - 370

SP - 572

EP - 577

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 3-4

ER -

Access to Document

10.1016/S0009-2614(03)00152-0