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Issue 24, 2012
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Luminescent ultrathin film of anionic styrylbiphenyl derivative–layered double hydroxide and its reversible sensing for heavy metal ions

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Abstract

Ordered ultrathin films (UTFs) with blue luminescence based on a styrylbiphenyl derivative (BTBS) and Mg–Al-layered double hydroxide (LDH) nanosheets have been constructed employing the layer-by-layer assembly technique. UV-visible absorption and fluorescence spectroscopy showed a stepwise and regular growth of the films upon increasing the number of deposition cycles. XRD, AFM and SEM indicated that the films possess a periodic layered structure with a period of ca. 1.5 nm, and uniform surface morphology. The film thickness can be precisely controlled in the range ca. 15–53 nm. The BTBS–LDH UTFs exhibit improved UV-light resistance capability compared with the pristine BTBS and show well-defined polarized photoemission, with anisotropy of ca. 0.24. The UTFs show a fast, selective and reversible luminescent response to aqueous solutions containing different heavy metal ions, with the most significant luminescent quenching occurring for the Hg2+ solution, shedding light on the fact that these films can serve as a new type of selective solid luminescent metal-ion sensor.

Graphical abstract: Luminescent ultrathin film of anionic styrylbiphenyl derivative–layered double hydroxide and its reversible sensing for heavy metal ions

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Publication details

The article was received on 05 Feb 2012, accepted on 20 Mar 2012 and first published on 20 Mar 2012


Article type: Paper
DOI: 10.1039/C2CP40350A
Citation: Phys. Chem. Chem. Phys., 2012,14, 8591-8598
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    Luminescent ultrathin film of anionic styrylbiphenyl derivative–layered double hydroxide and its reversible sensing for heavy metal ions

    D. Yan, J. Lu, M. Wei, S. Li, D. G. Evans and X. Duan, Phys. Chem. Chem. Phys., 2012, 14, 8591
    DOI: 10.1039/C2CP40350A

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