AUTHOR=Chen Hongfen , Yang Xiaoping , Jiang Weizhong , Jiang Dongmei , Shi Dongliang , Yuan Bichen , Wang Fei , Zhang Lijie , Huang Shaoming 

TITLE=Anion Dependent Self-Assembly of Polynuclear Cd-Ln Schiff Base Nanoclusters: NIR Luminescent Sensing of Nitro Explosives

JOURNAL=Frontiers in Chemistry

VOLUME=7

YEAR=2019

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2019.00139

DOI=10.3389/fchem.2019.00139

ISSN=2296-2646

ABSTRACT=<p>Two types of polynuclear Cd-Ln complexes [CdLnL(NO<sub>3</sub>)Cl<sub>2</sub>(DMF)<sub>2</sub>] [Ln = La (<bold>1</bold>) and Nd (<bold>2</bold>)] and [Ln<sub>2</sub>CdL<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>(DMF)<sub>2</sub>](OH)<sub>2</sub> [Ln = La (<bold>3</bold>) and Nd (<bold>4</bold>)] were constructed using a new Schiff base ligand which has a long backbone with two phenyl groups. The Schiff base ligands show a “twist” configuration in <bold>1</bold>–<bold>4</bold>. The crystal structures show that the molecular dimensions of <bold>3</bold> and <bold>4</bold> are about 6 × 10 × 15 Å. The Cd-Nd complexes <bold>2</bold> and <bold>4</bold> exhibit the typical NIR luminescence of Nd<sup>3+</sup>. Interestingly, <bold>4</bold> shows the luminescent sensing of nitro explosives and exhibits a high sensitivity to 2-nitrophenol at the ppm level.</p>