resumo
Four new ternary Cd(II) coordination polymers (CPs) based on rarely-used 2-(pyridin-2-yl)-1-(pyridin-3ylmethyl)-1H-benzo[d]imidazole (L) were synthesized via hydrothermal method, namely {[Cd(L)(H2DOBDC)]& BULL; H2O}n (1), {[Cd(L)(TP)]& BULL;2H2O}n (2), [Cd2(L)(DCTP)2(H2O)]n (3) and {[Cd2(L)(NDA)2]& BULL;H2O}n (4) (H4DOBDC = 2,5-dihydroxy terephthalic acids, H2TP = terephthalic acid, H2DCTP = 2,5-dichloroterephthalic acid and H2NDA = 1, 4-naphthalenedicarboxylic acid). 1 and 2 are 4-connected 2D sql layers, in which 2 is further expanded into a 3D supramolecular network by 7C -7C stacking interaction, while 3 and 4 exhibit threedimensional frameworks with unusual topology. 1 and 3/2 and 4 can act as dual-functional fluorescent sensors for the sensing of Hg2+/Co2+and chlortetracycline (CTC) with response times of 30 s for Hg2+/Co2+ and 20 s for CTC, respectively, in which 2 and 3 as promising fluorescence probes for analytes with detection limits of 1.44 and 0.91 & mu;moL/L, 3.34 and 0.66 & mu;moL/L, respectively. The fluorescence sensing mechanism was discussed in detail.
palavras-chave
METAL-ORGANIC FRAMEWORK; SELECTIVE DETECTION; FLUORESCENT-PROBE; HG2+; CR2O72; SENSOR; TNP
categoria
Chemistry; Crystallography
autores
Wang, XW; Fu, LS; Cui, GH
Grupos
Projectos
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
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 Project is supported by Hebei Natural Science Foundation (B2021209020). This work was 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).