Framework isomers controlled by the speed of crystallization: different aggregation fashions of Zn(II) and 1,2,4-triazol-3-amine, distinct (3,4)-connected self-penetrating nets, and various pore shapes

In this work, we report two exceptional framework isomers, Zn(L)(bdc)(0.5)center dot 0.25H(2)O (1, HL = 1,2,4-triazol-3-amine, H(2)bdc = terephthalic acid) and Zn(L)(bdc)(0.5)center dot 0.17H(2)O (2), where their formation is controlled by different speeds of crystallization. Further structural studies reveal that this operation of controlling the speed of crystallization may play a profound role in determining the aggregation fashions of Zn(II) ions and L- ligands, resulting in the various layers, viz. a 4.8(2) net vs. a 4.6.12 net. Importantly, this work also presents two previously unobserved (3,4)-connected self-penetrating matrixes.