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Coordination coupling enhanced two-photon absorption of ZnS-based nanohybrid for two-photon microscopy imaging in HepG2

Abstract

Coordination coupling induced self-assembly of ZnS microparticles have been prepared facilely under the guidance of a -conjugated sulfur-terminal Zn(II) complex ZnS2L (L = N-hexyl-3-{2-[4-(2,2′:6′,2′′-terpyridin-4′-yl)-phenyl]ethenyl}-carbazole). The interactions between ZnS and ZnS2L components at the interface, which are analyzed by far-IR and XPS, result in a tunable single-photon excited fluorescence and enhancement in nonlinear optical response, two-photon absorption cross section and two-photon excited fluorescence included. Such coordination coupling enhancement is triggered from the coordination effect of terminal S atoms of ZnS2L and naked Zn2+ ions at the surface of ZnS particles, and thus displays unique two-photon excited fluorescence to facilitate promising two-photon microscopy imaging in HeGp2 cells upon NIR light illumination at 840 nm. The hybrid shows a stronger ability to enter the cell than free ZnS2L.

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Publication details

The article was received on 14 Nov 2016, accepted on 27 Apr 2017 and first published on 02 May 2017


Article type: Paper
DOI: 10.1039/C6NR08883J
Citation: Nanoscale, 2017, Accepted Manuscript
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    Coordination coupling enhanced two-photon absorption of ZnS-based nanohybrid for two-photon microscopy imaging in HepG2

    L. Kong, X. Tian, H. Wang, Y. Gao, Q. Zhang, J. Yang, H. Zhou, S. Zhang and Y. Tian, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C6NR08883J

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