期刊
CRYSTENGCOMM
卷 17, 期 41, 页码 7878-7887出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ce01454a
关键词
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资金
- Natural Science Foundation of China [51272231, 21273101, 21271098]
- Foundation for Science & Technology Innovation Talents and Research Team in University of Henan [2014HASTIT014, 14IRTSTHN008]
- Tackle Key Problem of Science and Technology Project of Henan Province [142102310483]
- Ministry of Science and Technology of China (973 Project) [2014CB660804]
- Science program from University of Malaya [UM.C/625/1/HIR/247]
A family of six new homo-lanthanide coordination polymers incorporating a conjugated ligand of 2,5-di(2',4'-dicarboxylpheny)pyridine, namely, {[Ce(mu(3)-ddpp)]center dot 4H(2)O}(n) (1), {[Nd(mu(3)-ddpp)]center dot 2H(2)O}(n) (2), {[Sm(mu(6)-ddpp)]center dot H2O}center dot H2O}(n) (3), {[Eu(mu(6)-ddpp)]center dot H2O}(n) (4), {[Tb(mu(6)-ddpp)]center dot H2O}(n) (5), and {[Er(mu(6)-ddpp)]center dot H2O}(n) (6) (H(3)ddpp = 2,5-di(2',4'-dicarboxylpheny)pyridine acid), has been prepared successfully through solvothermal reactions. Polymers 1-6 exhibit various coordination environments and different multi-dimensions, but they are all assembled in a one dimensional (1-D) Ln-carboxylate chain. Polymer 1 only shows a 1-D ribbon chain, while polymer 2 exhibits a binodal (3, 8)-connected topology net. Heavy lanthanide polymers 4-6 possess 3D frameworks based on a rare (4, 8)-connected msw framework. Thermogravimetric and different thermal analysis measurements indicate that they all display high thermal stability. The luminescence emission spectra display characteristic f-f transition emissions of Ln(III) polymers in visible or near infrared (NIR) regions. The fluorescent ligand H(2)ddpp provides efficient energy transfer for the sensitization of Eu(III) and Tb(III) ions in the visible region, among which a Tb(III) polymer may be employed as a fluorescence ratiometric probe for the pollutant CrO42- anion.
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