A pillared-layered copper(i) halide-based metal-organic framework exhibiting dual emission, and piezochromic and thermochromic properties with a large temperature-dependent emission red-shiftElectronic 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 DOI: 10.1039/c7ra11950j

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. A pillared-layered copper( i ) halide-based metal-organic framework [Cu 6 I 6 Br 2 C 16 H 32 N 4 ] exhibiting dual emission, and piezochromic and thermochromic properties with a large temperature-dependent emission red-shift is reported.