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

被引：1

作者：

Colmont, Marie ^{[1
]}

Lemoine, Kevin ^{[2
]}

Roussel, Pascal ^{[1
]}

Kabbour, Houria ^{[1
]}

Olchowka, Jacob ^{[1
,3
]}

Henry, Natacha ^{[1
]}

Hagemann, Hans ^{[3
]}

Mentre, Olivier ^{[1
]}

机构：

[1] Univ Lille, Cent Lille, Univ Artois, ENSCL,UMR 8181,Unite Catalyse & Chim Solide, F-59000 Lille, France

[2] Le Mans Univ, UMR 6283, CNRS, IMMM, Le Mans 9, France

[3] Univ Geneva, Dept Chim Phys, 30 Quai E Ansermet, CH-1211 Geneva 4, Switzerland

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 20期

关键词：

MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; LOCALIZATION; COMPOUND; CL;

D O I：

10.1039/c8cc07707j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the identification and survey of the Pb(4)Ln(2)O(7) 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 angstrom and suggest a indirect to direct crossover realized by isolating the layers.

引用

页码：2944 / 2947

页数：4

共 27 条

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