Preparation of zinc oxide nanoparticles from nanoporous metal–organic framework with one-dimensional channels occupied with guest water molecules
摘要:
A new nanoporous metal-organic framework Zn-2(NDC)(2)(DMF)(2)(H2O)(4) (1 center dot DMF center dot H2O) [H2NDC = 2,6-naphthalene dicarboxylic acid and DMF = N,N'-dimethylformamide], with guest water molecules has been synthesized and characterized. This MOF is made up of a stacked arrangement of four-connected layers. Stacked arrangement of layers results in formation of nanoporous channels. The thermal stabilities of 1 center dot DMF center dot H2O and 1 center dot DMF were studied by TGA (thermo gravimetric analyses). The host and the apohost frameworks of 1 center dot DMF center dot H2O, 1 center dot DMF and 1 were used for preparation of ZnO nanomaterials. With calcination of the host framework of 1 center dot DMF center dot H2O, ZnO nanoparticles can be fabricated. By the same process on the apohost frameworks of 1 center dot DMF and 1, agglomerated nanoparticles of ZnO were formed. (C) 2015 Elsevier B.V. All rights reserved.
Preparation of zinc oxide nanoparticles from nanoporous metal–organic framework with one-dimensional channels occupied with guest water molecules
摘要:
A new nanoporous metal-organic framework Zn-2(NDC)(2)(DMF)(2)(H2O)(4) (1 center dot DMF center dot H2O) [H2NDC = 2,6-naphthalene dicarboxylic acid and DMF = N,N'-dimethylformamide], with guest water molecules has been synthesized and characterized. This MOF is made up of a stacked arrangement of four-connected layers. Stacked arrangement of layers results in formation of nanoporous channels. The thermal stabilities of 1 center dot DMF center dot H2O and 1 center dot DMF were studied by TGA (thermo gravimetric analyses). The host and the apohost frameworks of 1 center dot DMF center dot H2O, 1 center dot DMF and 1 were used for preparation of ZnO nanomaterials. With calcination of the host framework of 1 center dot DMF center dot H2O, ZnO nanoparticles can be fabricated. By the same process on the apohost frameworks of 1 center dot DMF and 1, agglomerated nanoparticles of ZnO were formed. (C) 2015 Elsevier B.V. All rights reserved.
Saturation of Hydrogen Sorption in Zn Benzenedicarboxylate and Zn Naphthalenedicarboxylate
作者:Anne Dailly、John J. Vajo、Channing C. Ahn
DOI:10.1021/jp0563538
日期:2006.1.1
We report excess hydrogen saturation values from high-pressure isotherms of metal organic framework structures taken at 77 K. Zn benzendicarboxylate (IRMOF-1) and Zn naphthalendicarboxylate (IRMOF-8) linker structures show identical saturation values of 137 hydrogen molecules on a per unit cell basis, despite the higher sorption potential of IRMOF-8 of 6.1 kJ/mol over that of IRMOF-1 of 4.IkJ/mol. Charge transfer between linker and vertex, as well as surface area, appear to dominate the sorption behavior, over that of linker length in these two systems.