cg501808y_si_003.cif (2.12 MB)
Download fileAdditive Effects in the Formation of Fluorescent Zinc Metal–Organic Frameworks with 5‑Hydroxyisophthalate
dataset
posted on 2015-03-04, 00:00 authored by Matthew
D. Hill, Samir El-Hankari, Mauro Chiacchia, Graham J. Tizzard, Simon J. Coles, Darren Bradshaw, Jonathan A. Kitchen, Tony D. KeeneThree new metal–organic frameworks
(MOFs) are formed from
the reaction of zinc with 5-hydroxyisophthalic acid (H3-5-hip) with a range of additives in dimethylformamide (DMF). The
additives include water, pyridine, and [MenNH4–n]Cl (n =
0–4) 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][Zn2(5-hip)(H-5-hip)(H2O)]·3.25DMF
(1), α-[Me2NH2]2[Zn2(5-hip)2]·2DMF (2), and
[Me2NH2][Me4N]2[Zn4(5-hip)2(H-5-hip2.5)]·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 β-[Me2NH2]2[Zn2(5-hip)2]·2DMF (4).
