title: A series of stilbazolium salts with A-π-A model and their third-order nonlinear optical response in the near-IR region.
abstract: A series of water-soluble stilbazolium salts with A-π-A (A: Acceptor) model have been synthesized and fully characterized. The results obtained from absorption spectra and TD-DFT computational studies show that there is a relative strong intramolecular charge transfer (ICT) transition from pyridine unit to pyridine cation of the stilbazolium salts. Furthermore, it is found that the three stilbazolium salts (T1, T2, T3) show the strong two-photon absorption (2PA) response in the near-infrared (IR) region by Z-scan technique using femtosecond laser. And the stilbazolium salt T3 shows the largest two-photon absorption cross-section and third-order nonlinear optical (NLO) coefficient χ(3)at 730nm, indicating the different terminal substituent group of the pyridinium plays a vital role in third-order NLO behavior.
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Yiwen
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Jian
authors.initials: J
authors.lastname: Su
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Shengyi
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Hongping
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
authors.forename: Shengli
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China. Electronic address: jywu1957@163.com.
authors.forename: Jieying
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China. Electronic address: yptian@ahu.edu.cn.
authors.forename: Yupeng
authors.initials: Y
authors.lastname: Tian
keywords: A-π-A model; Near infrared; Third-order NLO properties; Water-soluble stilbazolium salts