The reversible sorption-desorption of terminal coordinated water molecules and the guest molecules can switch slow magnetic relaxation in a classic lanthanide metal-organic framework system, Dy(BTC)(H2O)·DMF and Dy(BTC).

A copper(I) halide-based compound with a formula of [Cu4I3(DABCO)2]I3 (DABCO = N,N'-dimethyl-1,4-diazabicyclo[2.2.2]octane) has been prepared by solvothermal reactions. This compound has been characterized by single-crystal X-ray diffraction, elemental analysis, IR, TG, XPS and powder X-ray diffractions. Structure analyses reveal that this compound is constructed by unprecedented cationic cluster [Cu8I6](2+) and organic ligand DABCO and the channels of this compound are occupied by I2 and I(-). The guest I2 and I(-) can move freely in and out of the host-framework. UV/vis spectra confirm that the I2 molecules in the channels can release into some organic solvents and IR spectra confirm the I(-) was exchanged by SCN(-). In addition, the luminescent properties of this compound in the solid state have also been investigated.

A series of 3D interpenetrating metal-organic frameworks, namely, [Zn 3 (BPDC)

We report a new copper halide-based compound [Cu 6 I 6 Br 2 C 16 H 32 N 4 ] (1) with a 3D 2-fold interpenetrated framework structure. Upon excitation at 290 nm and 350 nm, compound 1 shows dual emission at ca. 500 nm and ca. 530 nm. As the temperature decreased from 300 K down to 6 K, the luminescent properties of compound 1 show large red shifts of 120 nm and 72 nm, respectively. † Electronic supplementary information (ESI) available: The bond lengths, IR spectra and TG curve. CCDC 967744 and 967745. For ESI and crystallographic data in CIF or other electronic format see