resumo
Effective detection of quinolone antibiotic residues has garnered significant concern due to their potential health risks and adverse effects on animal and human health. Herein, two robust zinc(II) coordination polymers (CPs), {[Zn2(L)(DCTP)2]& sdot;H2O}n (1) and {[Zn2(L)(MIP)2]}n (2) (L = bis(1-(pyridin-4-ylmethyl)-benzimidazol-2ylmethyl)ether, H2DCTP = 2,5-dichloroterephthalic acid, H2MIP = 5-methylisophthalic acid), were prepared by solvothermal reaction. 1 features a (3,4,4)-connected framework, and 2 exhibits a (3,4)-connected network. These two CPs as turn-on fluorescence sensors could display effective detecting abilities for five quinolone antibiotics (pefloxacin (PEF), enrofloxacin (ENR), ciprofloxacin (CIP), levofloxacin (LEV), and norfloxacin (NOR)) with naked-eye recognition. The concentration ranges of different analytes sensed by 1 and 2 with good linearity response were 0 - 4.75 and 0 - 6.50 mu mol & sdot;L- 1 for PEF, 0 - 14.00 and 0 - 11.00 mu mol & sdot;L- 1 for ENR, 0 - 10.75 and 0 - 17.50 mu mol & sdot;L- 1 for CIP, 0 - 5.75 and 0 - 11.00 mu mol & sdot;L- 1 for LEV, and 0 - 5.25 and 0 - 94.00 mu mol & sdot;L- 1 for NOR, respectively. Notably, the limits of detection for LEV were exceptionally low, at 2.47 x 10-9 mol & sdot;L- 1 for 1 and 1.22 x 10- 8 mol & sdot;L- 1 for 2. Moreover, CPs have strong recyclable ability, excellent selectivity, and antiinterference ability. The fluorescence sensing mechanism of 1 and 2 was investigated in detail.
palavras-chave
METAL-ORGANIC FRAMEWORK; SELECTIVE DETECTION; WATER; FE3+; MOFS; MECHANISM
categoria
Chemistry
autores
Gao, ZH; Fu, LS; Dong, GY; Qin, CL
nossos autores
Lianshe Fu
Investigador JúniorProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
The work was financially supported by the project of the Graduate Student Innovation Fund of North China University of Science and Technology and the Funded by Science Research Project of Hebei Education Department (QN2022043) . This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC) .