A series of tripodal imidazole frameworks (TIFs) are reported based on a tripodal, cavity-containing tris(imidazole) derivative. In the case of [Co3Cl6(1)2]·n(solvent) (TIF-1) which possesses a doubly interpenetrated framework structure, the material exhibits rigid, permanent porosity and selectively absorbs CO2. The non-interpenetrated [Co(1)2(H2O)2]Cl2·4H2O (TIF-2) also absorbs gases and vapours fully reversibly exhibiting a reversible phase change in the process and considerable conditioning and hysteresis. The very highly hydrated [Co(1)2]Cl2·22H2O (TIF-3) irreversibly dehydrates to the layered structure [Co(1)2]Cl2·H2O (TIF-4). A nickel analogue [Ni(1)2]Cl2·22H2O (TIF-5) closely related to TIF-3 is also reported along with two isostructural, non-porous materials [MCl2(1)] (M = Mn, TIF-6; M = Cd, TIF-7) based on d5 and d10Mn(II) and Cd(II). Some of the materials may be prepared by mechanochemical as well as solution based methods. We liken TIF-1 to a gas cylinder, TIF-2 to a sponge and TIF-3 to a fragile soda can that is crushed on emptying to give TIF-4.
本研究报道了一系列基于含空腔三(
咪唑)衍
生物的三重
咪唑框架(TIF)。在具有双互穿框架结构的[Co3Cl6(1)2]-n(溶剂)(TIF-1)中,材料表现出刚性、永久性多孔性,并能选择性地吸收
二氧化碳。非互穿的[Co(1)2(
H2O)2]Cl2-4 (TIF-2)也能完全可逆地吸收气体和蒸汽,在此过程中表现出可逆的相变以及相当大的调节性和滞后性。高度
水合的[Co(1)2]Cl2-22 (TIF-3)不可逆地脱
水成层状结构[Co(1)2]Cl2- (TIF-4)。与 TIF-3 密切相关的
镍类似物[Ni(1)2]Cl2-22 (TIF-5)以及两种基于 d5 和 d10Mn(II) 和 Cd(II) 的同结构无孔材料[MCl2(1)](M = Mn,TIF-6;M = Cd,TIF-7)也有报道。其中一些材料可通过机械
化学和溶液法制备。我们将 TIF-1 比作气瓶,TIF-2 比作海绵,TIF-3 比作易碎的苏打罐,在倒空时将其压碎就得到了 TIF-4。