A series of stilbazolium salts with A-π-A model and their third-order nonlinear optical response in the near-IR region

Yiwen Tang; Hui Liu; Hui Zhang; Dandan Li; Jian Su; Shengyi Zhang; Hongping Zhou; Shengli Li; Jieying Wu; Yupeng Tian

doi:10.1016/j.saa.2016.12.017

A series of stilbazolium salts with A-π-A model and their third-order nonlinear optical response in the near-IR region

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Mar 15:175:92-99. doi: 10.1016/j.saa.2016.12.017. Epub 2016 Dec 15.

Authors

Yiwen Tang¹, Hui Liu¹, Hui Zhang¹, Dandan Li¹, Jian Su¹, Shengyi Zhang¹, Hongping Zhou¹, Shengli Li¹, Jieying Wu², Yupeng Tian³

Affiliations

¹ Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China.
² Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, PR China. Electronic address: jywu1957@163.com.
³ 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.

PMID: 28024252
DOI: 10.1016/j.saa.2016.12.017

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.

Keywords: A-π-A model; Near infrared; Third-order NLO properties; Water-soluble stilbazolium salts.

Publication types

Review