中国物理B ›› 2018, Vol. 27 ›› Issue (2): 23302-023302.doi: 10.1088/1674-1056/27/2/023302

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Responsive mechanism and molecular design of di-2-picolylamine-based two-photon fluorescent probes for zinc ions

Mei-Yu Zhu(朱美玉), Ke Zhao(赵珂), Jun Song(宋军), Chuan-Kui Wang(王传奎)   

  1. School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
  • 收稿日期:2017-09-07 修回日期:2017-10-23 出版日期:2018-02-05 发布日期:2018-02-05
  • 通讯作者: Ke Zhao E-mail:zhaoke@sdnu.edu.cn
  • 基金资助:
    Project supported by the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2014AM026), the National Natural Science Foundation of China (Grant Nos. 11374195 and 11404193), and the Taishan Scholar Project of Shandong Province, China.

Responsive mechanism and molecular design of di-2-picolylamine-based two-photon fluorescent probes for zinc ions

Mei-Yu Zhu(朱美玉), Ke Zhao(赵珂), Jun Song(宋军), Chuan-Kui Wang(王传奎)   

  1. School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
  • Received:2017-09-07 Revised:2017-10-23 Online:2018-02-05 Published:2018-02-05
  • Contact: Ke Zhao E-mail:zhaoke@sdnu.edu.cn
  • About author:33.20.-t; 42.65.-k; 82.30.Fi
  • Supported by:
    Project supported by the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2014AM026), the National Natural Science Foundation of China (Grant Nos. 11374195 and 11404193), and the Taishan Scholar Project of Shandong Province, China.

摘要: The properties of one-photon absorption (OPA), emission and two-photon absorption (TPA) of a di-2-picolylamine-based zinc ion sensor are investigated by employing the density functional theory in combination with response functions. The responsive mechanism is explored. It is found that the calculated OPA and TPA properties are quite consistent with experimental data. Because the intra-molecular charge transfer (ICT) increases upon zinc ion binding, the TPA intensity is enhanced dramatically. According to the model sensor, we design a series of zinc ion probes which differ by conjugation center, acceptor and donor moieties. The properties of OPA, emission and TPA of the designed molecules are calculated at the same computational level. Our results demonstrate that the OPA and emission wavelengths of the designed probes have large red-shifts after zinc ions have been bound. Comparing with the model sensor, the TPA intensities of the designed probes are enhanced significantly and the absorption positions are red-shifted to longer wavelength range. Furthermore, the TPA intensity can be improved greatly upon zinc ion binding due to the increased ICT mechanism. These compounds are potential excellent candidates for two-photon fluorescent zinc ion probes.

关键词: two-photon absorption, fluorescent probe, zinc ion, intra-molecular charge transfer

Abstract: The properties of one-photon absorption (OPA), emission and two-photon absorption (TPA) of a di-2-picolylamine-based zinc ion sensor are investigated by employing the density functional theory in combination with response functions. The responsive mechanism is explored. It is found that the calculated OPA and TPA properties are quite consistent with experimental data. Because the intra-molecular charge transfer (ICT) increases upon zinc ion binding, the TPA intensity is enhanced dramatically. According to the model sensor, we design a series of zinc ion probes which differ by conjugation center, acceptor and donor moieties. The properties of OPA, emission and TPA of the designed molecules are calculated at the same computational level. Our results demonstrate that the OPA and emission wavelengths of the designed probes have large red-shifts after zinc ions have been bound. Comparing with the model sensor, the TPA intensities of the designed probes are enhanced significantly and the absorption positions are red-shifted to longer wavelength range. Furthermore, the TPA intensity can be improved greatly upon zinc ion binding due to the increased ICT mechanism. These compounds are potential excellent candidates for two-photon fluorescent zinc ion probes.

Key words: two-photon absorption, fluorescent probe, zinc ion, intra-molecular charge transfer

中图分类号:  (Molecular spectra)

  • 33.20.-t
42.65.-k (Nonlinear optics) 82.30.Fi (Ion-molecule, ion-ion, and charge-transfer reactions)