Journal
DALTON TRANSACTIONS
Volume -, Issue 43, Pages 9440-9445Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b909015k
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Funding
- State Key Laboratory of Structure Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences (CAS)
- National Ministry of Science and Technology of China [2007CB815301]
- National Science Foundation of China [20733003, 20801055, 20673118]
- Science Foundation of CAS
- Fujian Province [KJCX2-YW-M05, 2007J0171]
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Two new zinc phosphonates, [(C5H14N2)(0.5)Zn-5(HO3PCH(OH)CO2)(O3PCH(OH)CO2)(3) center dot 2H(2)O] center dot 2H(2)O (1) and [(C4H12N2)Zn-2(O3PCH(OH)CO2)(2)] (2), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction along with powder XRD, elemental analysis (EA), IR, and thermogravimetric analysis (TGA). In compound 1, [ZnO6] octahedra and [ZnO5] square-pyramids are bridged by 2-hydroxyl(phosphono) acetate with tri-, tetra-, and pentadentate coordination modes, resulting in a 3D framework possessing 1D 24-atom channels. In compound 2, 2-hydroxyl(phosphono)acetate exhibits a new tridentate coordination mode to link [ZnO4] tetrahedrons into a 2D hybrid layer. Both 2-methylpiperazine and piperazine serve as structure-directing agents, which are encapsulated into frameworks through electrostatic interactions and hydrogen bonding. Solids 1 and 2 display purple and yellow-green emission, respectively. It is interesting that solid 1 can give off bright white, yellow and orange-red emission under different heat-treatment temperatures. Furthermore, the luminescent color of solid 1-250 can be reversibly tuned among yellow-green, purple-blue, bright white and blue-green by shifting the wavelength of excited light.
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