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Issue 20, 2019
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Identification and optical features of the Pb4Ln2O7 series (Ln = La, Gd, Sm, Nd); genuine 2D-van der Waals oxides

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Abstract

We report on the identification and survey of the Pb4Ln2O7 series (Ln = La, Gd, Sm and Nd) which turn out to be real van der Waals 2D oxides. In the neutral layers, strong covalent Pb–O bonds together with external stereoactive Pb2+ lone pairs, which act as sensitizers, lead to an ideal matrix for enhanced and tunable luminescence by lanthanide emitters, tested here for Sm3+ and Eu3+ doping. DFT calculations and preliminary ex-solution experiments validate the weak bonding between the layers separated by 3.5 Å and suggest a indirect to direct crossover realized by isolating the layers.

Graphical abstract: Identification and optical features of the Pb4Ln2O7 series (Ln = La, Gd, Sm, Nd); genuine 2D-van der Waals oxides

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Publication details

The article was received on 25 Sep 2018, accepted on 30 Jan 2019 and first published on 31 Jan 2019


Article type: Communication
DOI: 10.1039/C8CC07707J
Chem. Commun., 2019,55, 2944-2947

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    Identification and optical features of the Pb4Ln2O7 series (Ln = La, Gd, Sm, Nd); genuine 2D-van der Waals oxides

    M. Colmont, K. Lemoine, P. Roussel, H. Kabbour, J. Olchowka, N. Henry, H. Hagemann and O. Mentré, Chem. Commun., 2019, 55, 2944
    DOI: 10.1039/C8CC07707J

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