Copper(I)-iodide based coordination polymers: bifunctional properties related to thermochromism and PMMA-doped polymer film materials

摘要: Poly(methyl methacrylate) (PMMA) films doped with Cu(I)-based imidazole derivative coordination polymers [Cu3I3(bib)1.5]n (1) and [Cu4I4(bix)2]n (2) [bib = 1,4-bis(1-imidazolyl)benzene bix 1,4-bis(imidazol-1-ylmethyl)benzene] were synthesized their photophysical properties studied. 1 2 prepared by a solvothermal method structurally characterized single-crystal X-ray diffraction, IR spectroscopy, 1H NMR, PXRD thermal gravimetric analyses. Molecular structural analysis reveals that exhibits unique one-dimensional (1D) infinite triplex chain is built from [Cu4I4]n cluster which possesses an interesting two-dimensional (2D) (4,4)-connected sql (square lattice) network. Detailed characterization of the supramolecular organization revealed overall three-dimensional (3D) interlinked networks driven extensive π⋯π stacking interactions. Both display remarkable narrow band emission smaller full width at half-maximum (FWHM) (77 K, 34.63 60.07 nm; 298 121.95 126.83 nm) in solid state 77 leads to excellent monochromaticity. The combination such FWHM large red-shift 62 nm K endows more prominent thermochromism effect than 1, emissions strongly depending on temperature tunable yellow red changing K. Here, role controlling performance thermochromic luminescence highlighted. Meanwhile, demonstrate stronger longer lifetime concentrations 0.8% (τ 156.62 μs) 1.0% 92.28 poly(methyl (PMMA). Furthermore, development easy-to-prepare hybrid materials 1–PMMA 2–PMMA bright polymer film outstanding stability daily applications (321 °C 500 °C).