1. 2,2′-Bipyridine derivatives containing aza-crown ether: Structure, two-photon absorption and bioimaging.
- Author
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Xu, Dongling, Yu, Zhipeng, Yang, Mingdi, Zheng, Zheng, Zhu, Li, Zhang, Xiuzhen, Ye, Lina, Wu, Jieying, Tian, Yupeng, and Zhou, Hongping
- Subjects
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BIPYRIDINE derivatives , *CROWN ethers , *LIGHT absorption , *X-ray diffraction , *SOLVENTS , *FLUORESCENCE - Abstract
Abstract: Two novel 6-phenyl-2,2′-bipyridine derivatives based on aza-crown ether groups were synthesized and characterized, one of which was characterized by single crystal X-ray diffraction determination. Their linear photophysical properties were systematically investigated in various solvents. The nonlinear photophysical properties were investigated by two-photon induced fluorescence method. Both dyes exhibited large two-photon absorption cross-section (δ 2PA ). The cytotoxicity of the dyes was evaluated in HepG2 cell line to assess the potential application for biomedical imaging. Two-photon fluorescence microscopy (TPFM) imaging of two dyes in HepG2 cell line was demonstrated, which indicated that introduction of the hydrophilic aza-crown ether facilitates biological compatibility of dyes. [Copyright &y& Elsevier]
- Published
- 2014
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