A 3D Haloplumbate Framework Constructed From Unprecedented Lindqvist-like Highly Coordinated [Pb6 Br25 ]13- Nanoclusters with Temperature-Dependent Emission

Xinxiong Li; T Thu Ha Do; A Granados Del Águila; Yinjuan Huang; Wangqiao Chen; Qihua Xiong; Qichun Zhang

doi:10.1002/asia.201801292

A 3D Haloplumbate Framework Constructed From Unprecedented Lindqvist-like Highly Coordinated [Pb₆ Br₂₅ ]^13- Nanoclusters with Temperature-Dependent Emission

Chem Asian J. 2018 Nov 2;13(21):3185-3189. doi: 10.1002/asia.201801292. Epub 2018 Oct 1.

Authors

Xinxiong Li¹, T Thu Ha Do², A Granados Del Águila², Yinjuan Huang¹, Wangqiao Chen¹, Qihua Xiong², Qichun Zhang¹

Affiliations

¹ School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore.
² Division of Physics and Applied Physics, School of Physical and Mathematics Science, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore.

PMID: 30199149
DOI: 10.1002/asia.201801292

Abstract

Searching novel haloplumbate building units to construct three-dimensional (3D) frameworks is very important and highly desirable because such materials would possess new physical properties and potential applications. Here, by employing tetrakis(N-imidazolemethylene)methane(TIMM) as a structure-directing agent, the first 3D haloplumbate framework constructed from unprecedented Lindqvist-like highly coordinated [Pb₆ Br₂₅ ]^13- nanoclusters has been successfully prepared under hydrothermal condition, where all Pb²⁺ centres in [Pb₆ Br₂₅ ]^13- nanoclusters adopt seven-/eight-coordinated configurations. The as-obtained material is a wide-gap semiconductor (≈3.1 eV) and can be stable up to 320 °C. More importantly, this material has been demonstrated to show temperature-dependent emission. Our results could provide a new strategy to explore novel metal-halide open-framework materials.

Keywords: Lindqvist-like; haloplumbates; highly coordinated; nanoclusters; photoluminescence; semiconductors.