Tripodal imidazole frameworks: Reversible vapour sorption both with and without significant structural changes
作者:Charlotte E. Willans、Sara French、Kirsty M. Anderson、Leonard J. Barbour、Jan-André Gertenbach、Gareth O. Lloyd、Robert J. Dyer、Peter C. Junk、Jonathan W. Steed
DOI:10.1039/c0dt01011a
日期:——
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.
A catenated imidazole-based coordination polymer exhibiting significant CO2 sorption at low pressure
作者:Charlotte E. Willans、Sara French、Leonard J. Barbour、Jan-André Gertenbach、Peter C. Junk、Gareth O. Lloyd、Jonathan W. Steed
DOI:10.1039/b911265k
日期:——
A robust, porous, catenated coordination polymer based on a neutral, flexible imidazole-derived tripodal ligand (a ‘tripodal imidazole framework’, TIF) reversibly absorbs vapours and gases, particularly CO2.
A small tris(imidazolium) cage forms an N-heterocyclic carbene complex with silver(i)
作者:Charlotte E. Willans、Kirsty M. Anderson、Peter C. Junk、Leonard J. Barbour、Jonathan W. Steed
DOI:10.1039/b708692j
日期:——
A small, sterically rigid tris(imidazolium) cyclophane reacts with Ag2O to give an Ag(I) carbene complex in which one of the imidazolium moieties remains protonated.