Additive Effects in the Formation of Fluorescent Zinc Metal Organic Frameworks with 5-Hydroxyisophthalate

作者：Hill Matthew D; El Hankari Samir; Chiacchia Mauro; Tizzard Graham J; Coles Simon J; Bradshaw Darren; Kitchen Jonathan A; Keene Tony D^*

来源：Crystal Growth & Design, 2015, 15(3): 1452-1459.

DOI：10.1021/cg501808y

Three new metalorganic frameworks (MOFs) are formed from the reaction of zinc with 5-hydroxyisophthalic acid (H-3-5-hip) with a range of additives in dimethylformamide (DMF). The additives include water, pyridine, and [MenNH4-n]Cl (n = 04) and, through hydrogen bonding, have a marked effect on the formation and phase of any resultant MOF, often in a narrow range of substoichiometric concentrations. The three MOFs, [Me2NH2][Zn-2(5-hip)(H-5-hip)(H2O)].3.25DMF (1), alpha-[Me2NH2](2)[Zn-2(5-hip)(2)].2DMF (2), and [Me2NH2][Me4N](2)[Zn-4(5-hip)(2)(H-5-hip(2.5))].3DMF (3), have solvent-accessible pores, and the flexibility of the MOFs allows relaxation from a porous state to minimize the void space on desolvation. Topological analysis of the frameworks reveals two previously unrecorded MOF topologies. Compounds 2 and 3 are fluorescent, while this property is absent in compound 1. We also present a revised structure for the closely related beta-[Me2NH2](2)[Zn-2(5-hip)(2)].2DMF (4).

• 出版日期2015-3