NIR luminescence for the detection of metal ions and nitro explosives based on a grape-like nine-nuclear Nd(iii) nanocluster†,10.1039/C8QI01166D

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NIR luminescence for the detection of metal ions and nitro explosives based on a grape-like nine-nuclear Nd(iii) nanocluster†

Hongfen Chen,Xiaoping Yang,Dongmei Jiang,Desmond Schipper,Richard A. Jones

Inorganic Chemistry Frontiers Pub Date : 01/14/2019 00:00:00 , DOI:10.1039/C8QI01166D

Abstract

Two 9-metal lanthanide nanoclusters [Ln₉L¹(L²)₂(OAc)₁₅(OH)₈(H₂O)₂(DMF)] (Ln = Nd (1) and Gd (2)) were synthesized using a long Schiff base ligand with a Ph-O-Ph-O-Ph backbone (H₂L¹) and a short tridentate aromatic ligand (H₂L²). 1 and 2 show grape-like structures with sizes of about 11 × 17 × 22 Å. In 1, the chromogenic ligands can sensitize the NIR luminescence of Nd³⁺ ions. Interestingly, 1 exhibits luminescence response to both metal ions and nitro explosives, and shows high sensitivity to Cd²⁺, Zn²⁺, Cu²⁺ and Co²⁺ ions and explosive HMX at the ppm level.