A Cd(II)−Tb(III) nanocluster {[Cd 10 Tb 9 L 8 (OH) 16 (OAc) 23 (H 2 O) 3 ]-[Cd 10 Tb 9 L 8 (OH) 16 (OAc) 23 (H 2 O) 4 ]}•3H 2 O ( 1), which contains two crystallographically independent components, was constructed from a tridentate ligand (HL, 3-ethoxysalicylaldehyde). It exhibits rapid and reliable excitation wavelengthdependent luminescence response to 2,6-dipicolinic acid (DPA) [limit of detection = 0.23 nM], which is not influenced by aromatic carboxylates, amino acids, and ions. The test papers of 1 can be used to check DPA in solution. The equation I Ex272nm / I Ex329nm = 0.0109 × [DPA]2 + 0.106 × [DPA] + 2.39 of 1 for the luminescence response could be used to quantitatively measure the concentration of DPA in tap water. 1 displays rapid and stable luminescence response to DPA, with the sensing times shorter than 5 s and no changes for the lanthanide luminescence over 24 h.

Two Cd-Ln (Ln = Ho(III) and Eu(III)) complexes 1 and 2 were synthesized using two organic ligands. The square-like Cd6Eu2 nanocluster 2 exhibits luminescence response to DPA through the enhancement...

A tubelike Zn­(II)–Yb­(III) cluster, [Zn6Yb5L5(HL)­(NO3)4(DMF)6(EtOH)4(H2O)4] (1; DMF = N,N-dimethylformamide and EtOH = ethanol; molecular size 1.5 × 1.8 × 2.9 nm), was synthesized from a new long-chain Schiff base ligand. 1 exhibits a regulatable near-IR-luminescent response to nitrofuran antibiotics (NFAs) and fluoroquinolones with high sensitivity, which is not influenced by other antibiotics. The quenching constants of NFAs and fluoroquinolones range from 0.55 × 104 to 8.8 × 104 M–1, and the detection limits of 1 to them are from 4.2 × 10–4 to 2.6 × 10–5 M. It also shows a luminescent response to real antibiotic drugs containing NFAs and fluoroquinolones.

A 24-metal Cd(II)-Sm(III) nanocluster [Cd18Sm6L9(OAc)36] (CSN) was constructed from a new flexible Schiff base ligand. It can be used as a probe to detect 2,6-dichloro-4-nitroaniline (DCN, LODs: 0.67 μM –...