文摘
To investigate the influence of organic molecules with reactive functional groups as templates on the structures of the resulting MOFs, four novel complexes based on the pyridyl carboxylic acid ligand 5-(pyridin-4-yl)isophthalic acid (H2pyip), namely, [Mn3(pyip)2(HCOO)2(H2O)2]n (1), {[Co(pyip)(H2O)]路H2O}n (2), {[Mn2(pyip)2(H2O)4]路5H2O}n (3), and [Co(pyip)(EtOH)(H2O)]n (4), have been synthesized under solvothermal conditions. In the presence of 4,4鈥?bipyridyl as the template, 3D coordination framework 1 with the Schl盲fli symbol of (4路6路7) (42路5路65路73路82路9路11) was obtained. Using cyanoacetic acid as the template, we obtained 2D double-layered structure 2 with the Schl盲fli symbol of (43) (46路66路83). 3 and 4 are prepared in the absence of a templating agent. 3 features an infinite 2D network with a 1D water chain penetrating the 1D channel and further results in a 3D supramolecule through hydrogen-bond interactions. 4 contains two independent 2D networks that are further connected to a 2D double-layered supramolecular framework by hydrogen bonds. The template-assisted method is a potential approach for obtaining specific intriguing complexes that might be difficult to access by routine synthetic methods. Magnetic investigations revealed that both 1 and 2 exhibit weak antiferromagnetic interactions mediated by pyip2鈥?/sup>.