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Smart composite films of nanometric thickness based on copper–iodine coordination polymers. Toward sensors

AuthorsConesa-Egea, Javier; Nogal, Noemí; Martínez, José I. ; Fernández-Moreira, Vanesa ; Rodríguez-Mendoza, Ulises R.; González-Platas, Javier; Gómez-García, Carlos J.; Delgado, Salomé; Zamora, Félix; Amo-Ochoa, Pilar
Issue Date2018
PublisherRoyal Society of Chemistry (UK)
CitationChemical Science 9(41): 8000-8010 (2018)
AbstractOne-pot reactions between CuI and methyl or methyl 2-amino-isonicotinate give rise to the formation of two coordination polymers (CPs) based on double zig-zag Cu2I2 chains. The presence of a NH2 group in the isonicotinate ligand produces different supramolecular interactions affecting the Cu-Cu distances and symmetry of the Cu2I2 chains. These structural variations significantly modulate their physical properties. Thus, both CPs are semiconductors and also show reversible thermo/mechanoluminescence. X-ray diffraction studies carried out under different temperature and pressure conditions in combination with theoretical calculations have been used to rationalize the multi-stimuli-responsive properties. Importantly, a bottom-up procedure based on fast precipitation leads to nanofibers of both CPs. The dimensions of these nanofibres enable the preparation of thermo/mechanochromic film composites with polyvinylidene difluoride. These films are tens of nanometers in thickness while being centimeters in length, representing smaller thicknesses so far reported for thin-film composites. This nanomaterial integration of CPs could represent a source of alternative nanomaterials for opto-electronic device fabrication.
Publisher version (URL)https://doi.org/10.1039/C8SC03085E
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