abstract
It is challenging to explore novel-structure lanthanide coordination polymers (Ln-CPs) for sensing environmental pollutants. Herein, we designed and synthesized an organic bridging linker 3-(carboxymethoxy)-1-(carboxymethyl) pyrazole-4-carboxylic acid (H3ccpc), and then successfully prepared and characterized a novel Ln-CP, namely [Tb2(ccpc)2(H2O)6]center dot 1.5H2O (ccpcTb). Structural analysis indicates that ccpcTb exhibits a two-dimensional structure, in which Tb ions are in an eight-coordinated environment. The photoluminescence performance of ccpcTb was discussed in detail. The ccpcTb displays bright green luminescence and behaves as a multi-responsive luminescent sensor toward Fe3+ ions, Cr2O72- ions and 2,4,6-trinitrophenol with high selectivity and low detection limits. Furthermore, the possible luminescence sensing mechanisms have been addressed in detail. The luminescence quenching mechanism of sensing Fe3+ and Cr2O72- is attributed to the energy competitive absorption, while that of sensing TNP is due to the synergistic effect of energy competitive absorption and photo-induced electron transfer. A novel terbium coordination polymer based on pyrazole carboxylic acid was designed and synthesized. Its applications as a luminescent chemosensor toward Fe3+, Cr2O72- and 2,4,6-trinitrophenol have been explored in detail.
keywords
METAL-ORGANIC FRAMEWORKS; TUNABLE LIGHT-EMISSION; HYDROTHERMAL SYNTHESIS; SELECTIVE DETECTION; CRYSTAL-STRUCTURES; SENSORS; LIGAND; CR2O72; ACID; FE3+
subject category
Chemistry
authors
Wang, X; He, SS; Chen, J; Wei, JM; Chen, CY; Shi, WY; Wu, DY; Fu, LS; Yang, TH
our authors
Lianshe Fu
Assistant ResearcherProjects
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)
acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 51973173), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (23KJA430007), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX23_1648) and the Changzhou Sci & Tech Program (CZ20210029). 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). We would also like to thank for its support the Analytical and Testing Center at Jiangsu University of Technology.