| Owing to their unique surface and interface effects, small size effects, quantum size effects, macroscopic quantum tunneling effect, and other properties, nanomaterials have a wide range of special properties. Coordination polymer micro/nano-structured materials as a new type of nanomaterials, have received more and more attention. Results show that they have promising applications in homogeneous catalysis, gasstorage and separation, chemical sensing, nonlinear optics, durg delivery, medical and biological imaging. In this issue, rare earth coordination polymers with excellent properties were selected and their corresponding micro/nanomaterials were synthesized using hydro/solvo-thermal routes. Cerium-based coordination polymer unconversion microspheres, terbium-based flowerlike coordination polymer hollow microspheres and gadolinium-based upconversion/magnetic multifunctional nanoparticles have been successfully prepared and their properties were investigated and their applications were also explored. The as-prepared products were characterized by various measurement techniques. The possible formation mechanism and the optical properties of the products were bridfly discussed and summarized. Our experiments not only provide a theoretical basis and experimental route for the synthesis of other other coordination polymers, and further expand the synthesis of new content of the coordination polymers. The main contents of this paper are as follows:(1) Uniform cerium-based coordination polymer microspheres: preparation, their conversion and upconversion emissionUniform Yb3+ and Er3+ doped cerium-based coordination polymer(CP) microspheres have been successfully synthesized through a simple solvothermal route with 2,5-pyridinedicarboxylic acid(2,5-H2PDC) as the organic linker. Meanwhile, Ce O2: Yb3+, Er3+microspheres were obtained by annealing the CP microspheres at 600 oC for 4 h under ambient pressure. The upconversion luminescence of the precursors and the cooresponding oxides was studied and compared.(2) Hierarchically terbium-based coordination polymer flowlike hollow microspheres: preparation and ions recognition investigationHierarchically terbium(Tb)-based coordination polymer(CP) hollow microspheres were successfully synthesized via a facile surfactants-free mixed-solvothermal route, among which 4-methybenzoic acid(HMBC) was used as organic linker. Experimental results show that the morphology of the product can be controlled synthesis by controlling the reaction parameters(reaction temperature, reaction time, solvent composition). Based on the above experiments, a possibile growth mechanism was proposed. In addition, the sensing property of Tb-MBC-1 with 14 metal ions and 8 human essential amino acids was systematically investigated.(3) Rare earth-doped(RE=Yb3+, Er3+) gadolinium-based hollow nanospheres: synthesis and upconversion luminescent propertiesIn this work, rare earth-doped(RE=Yb3+, Er3+) gadolinium-based hollow nanospheres have been successfully synthesized via a facile mixsolvothermal routes with Gd3+ central metal ion and Yb3+ and Er3+ as dopant ions, and diethylenetriaminepentaacetic acid(H5DTPA) as aorganic carboxylic acid linker. Interestinly, with the addition of organic surfactant polyvinylpyrrolidone(PVP), the hollowing degree could be tuned.(4) Construction of lanthanide coordination polymer via mixed ligands approach: synthese, structures and luminescent propertiesA single crystal of Lanthanide complex, [Tb2(dfba)4(phen)2(acac)2](1) has been synthesized via a mixed ligands approach, which based on 3,5-difluorobenzoic acid(dfba), 1,10-Phenanthroline monohydrate(phen) and acetylacetone(acac) under hydrothermal conditions. It crystallizes in the monoclinic space group P-1, with a = 10.1203(2) ?, b = 12.5601(2) ?, c = 14.0590(2) ?, α =104.1000(10)°, β =107.6220(10)°,γ =14.0590(2)°,V = 1481.24(4) ?3 and Z = 1. The luminescence properties of powder sample 1 were investigated at room temperature. |
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