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Two novel d 10 transition metal complexes based on 1 H ‐benzimidazole‐5,6‐dicarboxylic acid: Synthesis, structure and multifunctional luminescence detection
Author(s) -
Liu ChunHong,
Xing ShangHua,
Zhou Jun,
Bai FengYing,
Xing YongHeng
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5151
Subject(s) - chemistry , benzimidazole , dicarboxylic acid , luminescence , crystal structure , fluorescence , detection limit , hydrothermal synthesis , thermogravimetry , crystallography , metal ions in aqueous solution , inorganic chemistry , ion , hydrothermal circulation , polymer chemistry , organic chemistry , materials science , physics , optoelectronics , chromatography , quantum mechanics , seismology , geology
Two new coordination complexes based on benzimidazole dicarboxylic acid, Zn(Hbidc)⋅H 2 O ( 1 ) and Cd(Hbidc)(H 2 O) ( 2 ), have been synthesized under hydrothermal conditions. The complexes were characterized using elemental analysis, infrared and UV–visible spectroscopies, powder X‐ray diffraction, thermogravimetry and single‐crystal X‐ray diffraction. Structural analyses showed that the crystal structures of 1 and 2 are different, due to the various modes of linking of the benzimidazole dicarboxylic acid. Complex 1 has a two‐dimensional network structure and 2 has a three‐dimensional network structure. In addition, we studied the performance of the fluorescence response of two complexes. Results showed that the complexes can be used as chemical sensors for multifunctional testing, such as for UO 2 2+ , xanthine and Fe 3+ ions. Even if the concentration is very low, they could also be detected, showing that coordination complexes 1 and 2 have very high fluorescence sensitivity. The detection limit for UO 2 2+ is 5.42 nM ( 1 ) and 0.02 nM ( 2 ), that for xanthine is 1.37 nM ( 1 ) and 0.28 nM ( 2 ), and that for Fe 3+ ions is 0.76 nM ( 1 ) and 0.62 nM ( 2 ).