Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5160571 | Journal of Molecular Structure | 2017 | 18 Pages |
Abstract
Two new pillar-layered Ba(II)-based 3D frameworks and two new Ca(II)-based 3D supramolecular frameworks, [Ba2(dbtec)(H2O)2]n (1), [Ca2(dbtec)(H2O)8]n (2), {[Ba2(H2btec)·H2O]·0.5H2O}n (3) and [Ca(H2btec)·H2O]n (4) (H4dbtec = 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid; H4btec = benzene-1,2,4,5-tetracarboxylic acid), have been synthesized under similar reaction conditions and stoichiometry. Single crystal X-ray diffraction study reveals axial-orientation BrÂ·Â·Â·Ï supramolecular interactions exist in the crystal structure of 1, which keeps an 3D binodal network with the (32.412.510.62.72)(32.46.56.6)2 topology. Whereas in 2, intramolecular and intermolecular H-bonding interactions with the ligated water molecules promote the formation of 3D supramolecular frameworks network. For 3, a new 3D 3-nodal network occurs in the structure and some rare coordination modes for the H4btec are observed. There is a 2D double layer with the thickness of 7.60 Ã
in 4. In addition, besides the high thermal stability, the FTIR spectra, PXRD patterns and the photoluminescent of these compounds are also discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Shunfu Du, Chunqing Ji, Xuelian Xin, Mu Zhuang, Xuying Yu, Jitao Lu, Yukun Lu, Daofeng Sun,