Enhanced two-photon absorption and ultrafast dynamics of a new multibranched chromophore with a dibenzothiophene core

Yongli Yan; Bo Li; Kangjun Liu; Zhiwei Dong; Xiaomei Wang; Shixiong Qian

doi:10.1021/jp067783g

Enhanced two-photon absorption and ultrafast dynamics of a new multibranched chromophore with a dibenzothiophene core

Yongli Yan, Bo Li, Kangjun Liu, Zhiwei Dong, Xiaomei Wang, Shixiong Qian

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

39 Scopus citations

Abstract

A series of novel compounds with dibenzothiophene core branched structures have been synthesized, and their two-photon absorption (TPA) properties were investigated. Two-photon fluorescence (TPF) and z-scan techniques were carried out, and a significant enhancement in the TPA cross section was observed for ST-G2, which possesses the largest generation number among the studied samples. By using different solvents, the largest nonlinear optical (NLO) response was observed in the most polar solvent. Ultrafast pump-probe experiments were performed to probe the excited state dynamics in the branched molecules, and the obtained results further confirmed the TPA enhancement mechanism. Time-resolved fluorescence (TRFL) and TRFL anisotropy measurements reveal that there is an ultrafast charge localization to the intramolecular charge transfer (ICT) state followed by relaxation with a lifetime longer than 1 ns.

Original language	English
Pages (from-to)	4188-4194
Number of pages	7
Journal	Journal of Physical Chemistry A
Volume	111
Issue number	20
DOIs	https://doi.org/10.1021/jp067783g
State	Published - 24 May 2007
Externally published	Yes

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title = "Enhanced two-photon absorption and ultrafast dynamics of a new multibranched chromophore with a dibenzothiophene core",

abstract = "A series of novel compounds with dibenzothiophene core branched structures have been synthesized, and their two-photon absorption (TPA) properties were investigated. Two-photon fluorescence (TPF) and z-scan techniques were carried out, and a significant enhancement in the TPA cross section was observed for ST-G2, which possesses the largest generation number among the studied samples. By using different solvents, the largest nonlinear optical (NLO) response was observed in the most polar solvent. Ultrafast pump-probe experiments were performed to probe the excited state dynamics in the branched molecules, and the obtained results further confirmed the TPA enhancement mechanism. Time-resolved fluorescence (TRFL) and TRFL anisotropy measurements reveal that there is an ultrafast charge localization to the intramolecular charge transfer (ICT) state followed by relaxation with a lifetime longer than 1 ns.",

author = "Yongli Yan and Bo Li and Kangjun Liu and Zhiwei Dong and Xiaomei Wang and Shixiong Qian",

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T1 - Enhanced two-photon absorption and ultrafast dynamics of a new multibranched chromophore with a dibenzothiophene core

AU - Yan, Yongli

AU - Li, Bo

AU - Liu, Kangjun

AU - Dong, Zhiwei

AU - Wang, Xiaomei

AU - Qian, Shixiong

PY - 2007/5/24

Y1 - 2007/5/24

N2 - A series of novel compounds with dibenzothiophene core branched structures have been synthesized, and their two-photon absorption (TPA) properties were investigated. Two-photon fluorescence (TPF) and z-scan techniques were carried out, and a significant enhancement in the TPA cross section was observed for ST-G2, which possesses the largest generation number among the studied samples. By using different solvents, the largest nonlinear optical (NLO) response was observed in the most polar solvent. Ultrafast pump-probe experiments were performed to probe the excited state dynamics in the branched molecules, and the obtained results further confirmed the TPA enhancement mechanism. Time-resolved fluorescence (TRFL) and TRFL anisotropy measurements reveal that there is an ultrafast charge localization to the intramolecular charge transfer (ICT) state followed by relaxation with a lifetime longer than 1 ns.

AB - A series of novel compounds with dibenzothiophene core branched structures have been synthesized, and their two-photon absorption (TPA) properties were investigated. Two-photon fluorescence (TPF) and z-scan techniques were carried out, and a significant enhancement in the TPA cross section was observed for ST-G2, which possesses the largest generation number among the studied samples. By using different solvents, the largest nonlinear optical (NLO) response was observed in the most polar solvent. Ultrafast pump-probe experiments were performed to probe the excited state dynamics in the branched molecules, and the obtained results further confirmed the TPA enhancement mechanism. Time-resolved fluorescence (TRFL) and TRFL anisotropy measurements reveal that there is an ultrafast charge localization to the intramolecular charge transfer (ICT) state followed by relaxation with a lifetime longer than 1 ns.

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DO - 10.1021/jp067783g

M3 - 文章

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JO - Journal of Physical Chemistry A

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ER -

Enhanced two-photon absorption and ultrafast dynamics of a new multibranched chromophore with a dibenzothiophene core

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