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

One-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 Cu 2 I 2 chains. The presence of a NH 2 group in the isonicotinate ligand produces different supramolecular interactions affecting the Cu-Cu...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2018-11, Vol.9 (41), p.8-81
Main Authors: Conesa-Egea, Javier, Nogal, Noemí, Martínez, José Ignacio, Fernández-Moreira, Vanesa, Rodríguez-Mendoza, Ulises R, González-Platas, Javier, Gómez-García, Carlos J, Delgado, Salomé, Zamora, Félix, Amo-Ochoa, Pilar
Format: Article
Language:English
Subjects:
Composite materials
Coordination polymers
Copper
Crystallography
Emission spectra
Iodine
Mechanoluminescence
Nanofibers
Nanomaterials
Optoelectronic devices
Physical properties
Polymers
Polyvinylidene fluorides
Thickness
Thin films
X ray spectra
X-ray diffraction
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Summary:One-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 Cu 2 I 2 chains. The presence of a NH 2 group in the isonicotinate ligand produces different supramolecular interactions affecting the Cu-Cu distances and symmetry of the Cu 2 I 2 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. Multistimuli-responsive composite films with nanometric thickness based on Cu( i )-I coordination polymers.
ISSN:2041-6520
2041-6539
DOI:10.1039/c8sc03085e