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A simple and fast route for the synthesis of metal-organic framework(MOF) particles was presented.Cu3(BTC)2(HKUST-1,BTC=1,3,5-benzenetricarboxylate),one of the most well-known MOFs,was synthesized at room temperature via coordination modulation method.By adding different modulators(monocarboxylic acids) into the reaction system,the morphologies of HKUST-1 crystals were tuned from nano spheres to micro octahedrons at room temperature without any complex equipment.X-Ray diffractions and gas sorption measurements revealed highly crystalline particles with large Brunauer-Emmett-Teller(BET) surface areas(1116-1273 m2/g) and total pore volumes(0.62-0.73 cm3/g).The significantly small particle sizes and high capacity of gas sorption are considered advantageous for envisaged application in practical industrial process.