Two 42-metal lanthanide nanorings [Ln42L14(OH)28(OAc)84] (Ln = Nd (1), La (2)) were constructed, and the Nd42 cluster exhibits NIR luminescent sensing of metal cations and nitro explosives.

A 1-D coordination polymer [Sm(HL)2(NO3)]n was constructed using a new flexible Schiff base ligand that has a long-chain (CH2)10 backbone, and it shows dual-emissive response to metal ions, especially to Co2+ at the ppm level.

of main observation and conclusion One six-metal Zn(II)-Yb(III) complex [Zn 2 Yb 4 L 2 (OAc) 10 (OH) 2 (CH 3 OH) 2 ] (1) was constructed from Schiff base ligand bis(3-methoxysalicylidene)ethylene-1,2-phenylenediamine (H 2 L). 1 shows a nanoscale rectangular structure with dimensions of approximately 0.8 nm × 1.1 nm × 2.8 nm. Excited by ligand-centered absorption bands, 1 shows typical near-infrared emission of Yb 3+ ion. Interestingly, 1 exhibits lanthanide luminescent response towards metal ions, especially to Cd 2+ at ppm level.

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