CFA-2 and CFA-3 (Coordination Framework Augsburg University-2 and -3); novel MOFs assembled from trinuclear Cu(i)/Ag(i) secondary building units and 3,3′,5,5′-tetraphenyl-bipyrazolate ligands
作者:Maciej Grzywa、Christof Geßner、Dmytro Denysenko、Björn Bredenkötter、Fabienne Gschwind、Katharina M. Fromm、Wojciech Nitek、Elias Klemm、Dirk Volkmer
DOI:10.1039/c3dt32302a
日期:——
The syntheses of H2-phbpz, [Cu2(phbpz)]·2DEF·MeOH (CFA-2) and [Ag2(phbpz)] (CFA-3) (H2-phbpz = 3,3â²,5,5â²-tetraphenyl-1H,1â²H-4,4â²-bipyrazole) compounds and their crystal structures are described. The Cu(I) containing metalâorganic framework CFA-2 crystallizes in the tetragonal crystal system, within space group I41/a (no. 88) and the following unit cell parameters: a = 30.835(14), c = 29.306(7) Ã
, V = 27â865(19) Ã
3. CFA-2 features a flexible 3-D three-connected two-fold interpenetrated porous structure constructed of triangular Cu(I) subunits. Upon exposure to different kinds of liquids (MeOH, EtOH, DMF, DEF) CFA-2 shows pronounced breathing effects. CFA-3 crystallizes in the monoclinic crystal system, within space group P21/c (no. 14) and the following unit cell parameters: a = 16.3399(3), b = 32.7506(4), c = 16.2624(3) Ã
, β = 107.382(2)°, V = 8305.3(2) Ã
3. In contrast to the former compound, CFA-3 features a layered 2-D three-connected structure constructed from triangular Ag(I) subunits. Both compounds are characterized by elemental and thermogravimetric analyses, single crystal structure analysis and X-ray powder diffraction, FTIR- and fluorescence spectroscopy. Preliminary results on oxygen activation in CFA-2 are presented and potential improvements in terms of framework robustness and catalytic efficiency are discussed.
介绍了H2-phbpz、[Cu2(phbpz)]Â-2DEFÂ-MeOH(CFA-2)和[Ag2(phbpz)](CFA-3)(H2-phbpz = 3,3â²,5,5â²-四苯基-1H,1â²H-4,4â²-联唑)化合物的合成及其晶体结构。含Cu(I)的金属无机框架CFA-2在四方晶系中结晶,其空间群为I41/a(编号88),单胞参数如下:a = 30.835(14), c = 29.306(7) Ã, V = 27â865(19) à 3。CFA-2具有由三角形Cu(I)亚基构成的灵活的三维三连接两折叠互穿多孔结构。在暴露于不同的液体(MeOH、EtOH、DMF、DEF)时,CFA-2 表现出明显的呼吸效应。CFA-3 结晶于单斜晶系,空间群为 P21/c(编号 14),单胞参数如下:a = 16.3399(3),b = 32.7506(4),c = 16.2624(3) Ã,δ = 107.382(2)°, V = 8305.3(2) à 3。与前一种化合物不同,CFA-3 具有由三角形 Ag(I) 亚基构建的层状 2-D 三连接结构。这两种化合物都通过元素分析、热重分析、单晶结构分析、X 射线粉末衍射、傅立叶变换红外光谱和荧光光谱进行了表征。介绍了 CFA-2 中氧活化的初步结果,并讨论了在框架稳健性和催化效率方面的潜在改进。