title: Synthesis, crystal structures, and two-photon absorption of a series of cyanoacetic acid triphenylamine derivatives.
abstract: A specific series of chromophores (CN1, CN2, CN3, and CN4) have been synthesized, in which contained a triphenylamine moiety as the electron donor (D), a cyanoacetic acid moiety as the electron acceptor (A), vinylene or phenylethyne as the π-bridge, and ethyoxyl groups as auxiliary electron donor (D') to construct the D-π-A or D'-D-π-A molecular configuration. Photophysical properties of them were systematically investigated. These results show that the chromophores display a solvatochromism (blue shift) and large Stokes shifts for their absorption bands with increasing polarity of the solvent. Furthermore, the chromophore CN4 shows the strongest intensity of two-photon excited fluorescence and largest two-photon absorption cross section (2783 GM) in the near infrared region. Finally, the connections between the structures and properties are systematically investigated relying on the information from linear and nonlinear optical properties, crytsal structures and quantum chemical calculation.
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China; Department of Chemistry, Fuyang Normal College, Fuyang 236036, PR China.
authors.forename: Fuying
authors.initials: F
authors.lastname: Hao
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China.
authors.forename: Shengli
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China.
authors.forename: Shengyi
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China.
authors.forename: Hongping
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China.
authors.forename: Jieying
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Anhui University, Hefei 230601, PR China. Electronic address: yptian@ahu.edu.cn.
authors.forename: Yupeng
authors.initials: Y
authors.lastname: Tian
keywords: Computational techniques; Crystal structure; Optical properties; Organic compounds