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Issue 2, 2014
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Two novel six-coordinated cadmium(II) and zinc(II) complexes from carbazate β-diketonate: crystal structures, enhanced two-photon absorption and biological imaging application

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Abstract

To explore the photophysical properties of coordination compounds with enhanced two-photon absorption, two novel six-coordinated metal complexes (ML2, M = Cd(II), Zn(II)) from carbazole β-diketone ligand (HL = 4,4,4-trifluoro-1-(9-butylcarbazole-3-yl)-1,3-butanedione) were prepared and fully characterized. Their crystal structures were determined by X-ray diffraction analysis. Both variable temperature 1H NMR spectra and MALDI-TOF mass spectrometry proved that the coordination compounds exhibit good stability in solution. The results of time-dependent density functional theory (TD-DFT) calculations indicated that the complexation of the ligands with metal ion extends the electronic delocalization in the coordination compounds, leading to enhanced two-photon absorption. The photophysical properties for the coordination compounds were identified relying on both experimentally and theoretically studies. Finally, confocal microscopy and two-photon microscopy fluorescent imaging of HepG2 cells labeled with the Zn(II) complexe revealed its potential applications as a biological fluorescent probe.

Graphical abstract: Two novel six-coordinated cadmium(ii) and zinc(ii) complexes from carbazate β-diketonate: crystal structures, enhanced two-photon absorption and biological imaging application

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Publication details

The article was received on 20 May 2013, accepted on 24 Sep 2013 and first published on 24 Sep 2013


Article type: Paper
DOI: 10.1039/C3DT51318A
Citation: Dalton Trans., 2014,43, 599-608
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    Two novel six-coordinated cadmium(II) and zinc(II) complexes from carbazate β-diketonate: crystal structures, enhanced two-photon absorption and biological imaging application

    C. Nie, Q. Zhang, H. Ding, B. Huang, X. Wang, X. Zhao, S. Li, H. Zhou, J. Wu and Y. Tian, Dalton Trans., 2014, 43, 599
    DOI: 10.1039/C3DT51318A

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