Synthesis of two-dimensional metal–organic networks from 1,10-phenanthroline-chelated cadmium complex and polycarboxylate
摘要:
The design of two 2D metal-organic frameworks using a 1, 10-phenanthroline-chelated cadmium complex as precursor and a bridging polycarboxylate as linker is described. The reaction of Cd(NO3)(2)center dot 4H(2)O with the chelating ligand 1,10-phenanthroline (phen) at room temperature gave [Cd(phen)(NO3)(2)] (1) in high yield. Treatment of the inorganic precursor 1 with the polycarboxylate bridge ligand, benzene-1,4-dicarboxylic acid (H2BDC) or benzene-1,2,4,5-tetracarboxylic acid (H(4)btec), under mild hydrothermal conditions led to the formation of two metal-organic networks {[Cd(BDC)(phen)]-DMF}(n) (2) and [Cd-2(btec)(phen)(2)](n) (3). Single-crystal X-ray diffraction analyses showed that both products have two-dimensional sheet architectures. Compound 2 was constructed via the use of [Cd-2(O2C-)(4)] unit and BDC linker, whereas compound 3 involved the use of [CdO4] core and btec bridge. The cadmium ions in compounds 2 and 3 are hepta- and hexa-coordinated, respectively. Thermogravimetric (TG) analyses showed that 2 and 3 are thermally stable (T-decom. > 360 degrees C). Photoluminescence studies revealed that compounds 1-3 displayed a strong fluorescent emission in the solid state at room temperature. (c) 2006 Elsevier B.V. All rights reserved.
Synthesis of two-dimensional metal–organic networks from 1,10-phenanthroline-chelated cadmium complex and polycarboxylate
摘要:
The design of two 2D metal-organic frameworks using a 1, 10-phenanthroline-chelated cadmium complex as precursor and a bridging polycarboxylate as linker is described. The reaction of Cd(NO3)(2)center dot 4H(2)O with the chelating ligand 1,10-phenanthroline (phen) at room temperature gave [Cd(phen)(NO3)(2)] (1) in high yield. Treatment of the inorganic precursor 1 with the polycarboxylate bridge ligand, benzene-1,4-dicarboxylic acid (H2BDC) or benzene-1,2,4,5-tetracarboxylic acid (H(4)btec), under mild hydrothermal conditions led to the formation of two metal-organic networks {[Cd(BDC)(phen)]-DMF}(n) (2) and [Cd-2(btec)(phen)(2)](n) (3). Single-crystal X-ray diffraction analyses showed that both products have two-dimensional sheet architectures. Compound 2 was constructed via the use of [Cd-2(O2C-)(4)] unit and BDC linker, whereas compound 3 involved the use of [CdO4] core and btec bridge. The cadmium ions in compounds 2 and 3 are hepta- and hexa-coordinated, respectively. Thermogravimetric (TG) analyses showed that 2 and 3 are thermally stable (T-decom. > 360 degrees C). Photoluminescence studies revealed that compounds 1-3 displayed a strong fluorescent emission in the solid state at room temperature. (c) 2006 Elsevier B.V. All rights reserved.