Regulatable Detection of Antibiotics Based on a Near-IR-Luminescent Tubelike Zn(II)–Yb(III) Nanocluster

Abstract

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 new two-dimensional cadmium(II) coordination polymer based on the asymmetric dicarboxylic acid homophthalic acid: synthesis, structure and properties

“…The linear correlations (R 2 is 0.984) between the quenching efficiency and the amount of NFT can be fitted by the S-V equation at low concentrations, resulting in the superior luminescence quenching constant K SV of 3.78 Â 10 4 M À1 for (I) (Fig. 8), which is higher than the values for some relevant fluorescence sensors reported in recent years (Chen et al, 2022;Li et al, 2022;Wang et al, 2020) and therefore indicates that (I) can serve as a promising luminescent sensor for the quantitative recognition of NFT in H 2 O. To assess the response selectivity toward NFT, the sensing behavior of (I) was investigated in the presence of other competing antibiotics with a concentration of 10 À2 M. As shown in Fig.…”

Silver Clusters Coprotected by Different Diphosphine and Thiol Ligands

“…Luminescent properties play an important role in the application of metal clusters, which can promote the application of clusters in fluorescent probes and biological imaging. − The solid-state emission of 1 was measured, showing red emission at 658 nm under the light excitation at 445 nm (Figure ). When dissolved in CH 2 Cl 2 , 1 shows a red shift in emission compared to the solid-state and displays a emission centered at 670 nm (λ ex = 400 nm).…”

Sensing and photocatalytic properties of a new 3D Co(ii) coordination polymer based on 1,1′-di(p-carboxybenzyl)-2,2′-biimidazole

“…Therefore, the photoinduced electron transfer (PET) from 1 to NFT might account for the fluorescence quenching effect of NFT of 1. 38 Thus, it can be deduced that the luminescence quenching of 1 for sensing NFT can be attributed to the process of FRET and PET. 39,40…”