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Scientific article
English

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

Published inChemical Communications, vol. 55, no. 20, p. 2944-2947
Publication date2019
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.

Citation (ISO format)
COLMONT, Marie et al. Identification and optical features of the Pb<sub>4</sub>Ln<sub>2</sub>O<sub>7</sub> series (Ln = La, Gd, Sm, Nd); genuine 2D-van der Waals oxides. In: Chemical Communications, 2019, vol. 55, n° 20, p. 2944–2947. doi: 10.1039/C8CC07707J
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