resumo
Employing coordination polymers (CPs) developing effective organic contaminants and heavy metal ions luminescent detection systems is an ongoing challenge. Three ternary Cd(II) CPs namely [Cd(MIP)(L)0.5(H2O)]n (1), [Cd2(TPA)2(L)(H2O)]n (2), and [Cd2(DCTP)2(L)(H2O)]n (3), (L = 1,6-bis(2-((1H-imidazol-1-yl)methyl)-1Hbenzo[d]imidazol-1-yl)hexane, H2MIP = 5-methylisophthalic acid, H2TPA = terephthalic acid, and H2DCTP = 2,5-dichloroterephthalic acid) containing new L ligands, were hydrothermally synthesized and characterized. 1 displays a (4,4)-connected 4,4L28 layer and further extended into the 3D supramolecular framework via ff-ff stacking interactions. 2 exhibits a (4,4,5)-connected trinodal network with the point symbol of {42.5.62.8} {42.52.72}{42.53.62.73}2. 3 takes on a (3,5,6)-connected framework with the point symbol {3.42.52.7} {3.82}2{33.44.5.62.82.92.10}2. 1 - 3 show highly good thermal stability, and highly acid-base tolerance. The limits of detection (LOD) of 1 - 3 were calculated as follows: for Cu2+, the LODs are 8.92 x 10-8, 5.74 x 10- 7, and 9.37 x 10-8 mol L-1, respectively; for Hg2+, the LOD values are 3.73 x 10-7, 5.22 x 10-7, and 8.45 x 10-7 mol L-1, respectively. Regarding levofloxacin (LEV), the LODs for 1 - 3 were found to be 5.11 x 10-8 mol L-1, 2.45 x 10-8 mol L-1, and 8.54 x 10-8 mol L-1, respectively. Finally, for acetylacetone (acac), the LODs of 1 - 3 are 5.53 x 10-6, 5.66 x 10-6, and 1.23 x 10-6 mol L-1, respectively. 1 - 3 represent the first examples of exceptional multi-responsive sensing platforms for the detecting of Cu2+, Hg2+, LEV, and acac with high sensitivity, outstanding anti-interference abilities, and low LODs. The possible sensing mechanisms were investigated in detail.
palavras-chave
SONOCHEMICAL SYNTHESIS; CRYSTAL-STRUCTURES; ZINC(II); IONS
categoria
Chemistry
autores
Fan, XF; Fu, LS; Cui, GH
nossos autores
Lianshe Fu
Investigador JúniorProjectos
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was developed within the scope of Hebei Natural Science Foundation (B2021209020) , the project CICECO-Aveiro Institute of Materials (Portugal) , IDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC) .