Two luminescent transition-metal–organic frameworks with a predesigned ligand as highly sensitive and selective iron(III) sensors

Content Provider	Semantic Scholar
Author	Zhang, Jian Zhao, Lili Liu, Yinxia Li, Mingyue Meng, Xiangru
Copyright Year	2018
Abstract	To obtain new structural MOFs with the desired properties, a multifunctional organic ligand, 2-(4-cyanophenyl)-1H-imidazole-4,5-dicarboxylic acid (p-CNPhH3IDC) has been designed and prepared. The optimized geometry and natural bond orbital (NBO) charge distributions of the free p-CNPhH3IDC ligand have been calculated by the theoretical method. Its strong coordination ability was confirmed by experimental results. In addition, two new metal–organic frameworks [Cd(p-CNPhHIDC)(4,4′-bipy)0.5]n (1) and [Zn(p-CNPhHIDC)(4,4′-bipy)]n (2) (4,4′-bipy = 4,4′-bipyridine), have been hydro(solvo)thermally synthesized and structurally characterized by elemental analysis, infrared spectroscopy, powder X-ray diffraction and single crystal X-ray diffraction. Their chemical-stable, thermal and solid-state photoluminescent properties have been investigated. Luminescence studies reveal that both the complexes not only can highly selectively sense the Fe3+ ion through fluorescence quenching but also resist interference from other metals. More importantly, the response time is very fast. This suggests that the possible sensing mechanism is the competitive absorption of excitation energy.
Starting Page	6839
Ending Page	6847
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1039/C8NJ00656C
Volume Number	42
Alternate Webpage(s)	http://www.rsc.org/suppdata/c8/nj/c8nj00656c/c8nj00656c1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C8NJ00656C
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article