| Metal-organic framework(MOF) coordination polymers have receivedwidespread attention for their potential applications in catalysis, separation, gasstorage, optics, electrics and magnetics etc. Traditionally, the self-assembly isadopted to achieve purposeful synthesis through selecting the transition metalcations and organic ligands with multi-coordinate atoms in water or organicsolvents. The variety of metods has a significant influence on the synthesis ofnew coordination polymers, such as novel topologies and functional materials.Here we selected the transition metal copper cations and trimesic acid ligands tobuild Metal-organic frameworks in ionic liquids. In this paper, two metal-organiccoordination polymers were achieved: Cu2O4(BTC)Cl and Cu3(BTC)2. Inaddition, we also reported the synthesis of Cu3(BTC)2 under hydrothermalconditions.Firstly, A ionothermal reaction of Cu(NO3)2·2.5H2O, trimesic acid yielded anovel metal-organic coordination polymer Cu2O4(BTC)Cl by using an eutecticmixtures of urea and Choline chloride as sovlent. The samples synthesized werecharacterized by the XRD, FT-IR, SEM, and TG-DTA. The experiment results showed that Cu2O4(BTC)Cl was synthesized when the chemical compositionswere Cu(NO3)2·2.5H2O; trimesic acid:urea:Choline chloride=1.8:1:16.67:7.16:3.260 and crystallization temperature and time were 373 K and 3days. X-ray single crystal structure determination reveals a two-dimensionalcovalent multi-layer structure. Its single crystal structure belongs to monocliniccrystal system, space group P121/c1(14), with cell parameters a=20.19(3)(?),b=7.413(9)(?), c=20.13(3)(?),β=91.50°, V=3011.79(732)(?)3。Secondly, A ionothermal reaction of Cu(NO3)2·2.5H2O, trimesic acidyielded a metal-organic coordination polymerCu3(BTC)2 by using an eutecticmixtures of 1, 3-dimethylurea and Choline chloride as sovlent. The samplessynthesized were characterized by the XRD, FT-IR, SEM and TG-DTA. Theexperiment results proved that Cu3(BTC)2 was obtained when the chemicalcompositions were Cu(NO3)2·2.5H2O:trimesic acid:urea:Cholinechloride=1.8:1:16.67:7.16:3.260 and crystallization temperature and timewere 373 K and 3 days. Moreover, the experiment results showed thatCu3(BTC)2. could be synthesized in deep organic eutectics maxtures ofimidazolone and Choline chloride, deep organic eutectics maxtures of1,3-dimethylurea and tetraethylammonium chloride or in an ionic liquid of1-ethyl-3-methyl-imidazole bromide, but the products with high relativecrystallinity, good crystal morphology and large crystal size were synthesized inthe mixtures of 1, 3-dimethylurea and Choline chloride.Finally, A hydrothermal reaction of Cu(NO3)2·2.5H2O, trimesic acid, andethanol and H2O yielded a metal-organic coordination polymer, Cu3(BTC)2. Thesamples synthesized were characterized by the XRD, SEM and FT-IR. Theexperiment results proved that the feasible synthesis conditions for Cu3(BTC)2were the copper nitrate/trimesic acid molar ratio of 0.6～3.0, the ethanol/water molar ratio of 0.440～0.146, 100℃and crystallization time of 3d. The hydrogenstorage properties of Cu3(BTC)2 were studied. It was proved that the hydrogenstorage of Cu3(BTC)2 could be 2.10Wt.% at 77K in the pressure of 1.41MPa,which was 0.50wt.% more than that of typical aluminosilicate zeolites, being akind of hydrogen adsorption materials of great worth.
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