Synthesis, Crystal Structures and Luminescent Properties of Zn(II)/Cd(II) Metal–Organic Frameworks Constructed by 1,4-Benzenedicarboxylic Acid and 4,4′-(2,5-Difluoro-1,4-phenylene)dipyridine

Two new 3D fluorescence metal–organic frameworks, namely [Zn 2 ( p -bdc) 4 (dfdp) 2 ] n ( 1 ) and [Cd 2 ( p -bdc) 4 (dfdp) 4 ] n ( 2 ) ( p -H 2 bdc = 1,4-benzenedicarboxylic acid; dfdp = 4,4′-(2,5-difluoro-1,4-phenylene)dipyridine) have been synthesized under solvothermal conditions and structurally...

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Published in:Journal of inorganic and organometallic polymers and materials 2020-11, Vol.30 (11), p.4289-4296
Main Authors: Yang, Yi, Qi, Xiu-Xiu, Chen, Hao-Ran, Wang, Xi-Yao, Yang, Xiao-Lin, Tu, Yu-Yu, Zhou, Tiantian, Jiang, Tianyu, Wang, Fei, Chen, Ziying, Ju, Yi-Chun
Format: Article
Language:English
Subjects:
Cadmium
Chemistry
Chemistry and Materials Science
Construction
Coordination numbers
Crystal structure
Fluorescence
Infrared analysis
Infrared spectra
Inorganic Chemistry
Luminescence
Metal-organic frameworks
Optical properties
Organic Chemistry
Polymer Sciences
Single crystals
Solid state
Synthesis
X ray powder diffraction
Zinc
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Summary:Two new 3D fluorescence metal–organic frameworks, namely [Zn 2 ( p -bdc) 4 (dfdp) 2 ] n ( 1 ) and [Cd 2 ( p -bdc) 4 (dfdp) 4 ] n ( 2 ) ( p -H 2 bdc = 1,4-benzenedicarboxylic acid; dfdp = 4,4′-(2,5-difluoro-1,4-phenylene)dipyridine) have been synthesized under solvothermal conditions and structurally characterized by elemental analysis, infrared spectra, TG, UV–Vis spectra, fluorescence spectra, single crystal and powder X-ray diffraction. Compound 1 shows a 3D framework constructed by infinite [Zn 2 ( p -bdc) 4 ] n layer as nodes and the dfdp ligands as connected linkers. Compound 2 reveals a different structure from compound 1 which can be mainly attributed to different coordination numbers of dfdp linkers. Compared with compound 2 , UV–vis spectrum of compound 1 is 25 nm red-shifted. Both compounds show strong solid-state luminescence at about 400 nm. Of particular interest is that the quantum yield of compound 1 is 11.73. Graphic Abstract Two novel 3D fluorescence metal–organic frameworks [Zn 2 ( p -bdc) 4 (dfdp) 2 ] n ( 1 ) and [Cd 2 ( p -bdc) 4 (dfdp) 4 ] n ( 2 ) have been synthesized and structurally characterized. Compound 1 show strong solid-state purple luminescence with 11.73 quantum yield (QY).
ISSN:1574-1443
1574-1451
DOI:10.1007/s10904-020-01627-1