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Luminescent thermochromism of 2D coordination polymers based on copper(I) halides with 4-hydroxythiophenol

AutorTroyano, Javier; Perles, Josefina ; Amo-Ochoa, Pilar; Martínez, José I. ; Gimeno, M. Concepción ; Fernández-Moreira, Vanesa ; Zamora, Félix; Delgado, Salomé
Palabras clavemultifunctional materials
Coordination polymers
Luminescent materials
Stimuli-responsive materials
Thermochromic coordination polymers
Fecha de publicación2016
CitaciónChemistry - A European Journal 22(50): 18027-18035 (2016)
ResumenSolvothermal reactions between copper(I) halides and 4-mercaptophenol give rise to the formation of three coordination polymers with general formula [Cu3X(HT)2]n (X=Cl, 1; Br, 2; and I, 3). The structures of these coordination polymers have been determined by X-ray diffraction at both room- and low temperature (110 K), showing a general shortening in Cu−S, Cu−X and Cu−Cu bond lengths at low temperatures. 1 and 2 are isostructural, consisting of layers in which the halogen ligands act as μ3-bridges joining two Cu1 and one Cu2 atoms whereas in 3 the iodine ligands is as μ4-mode but the layers are quasi-isostructural with 1 or 2. These compounds show a reversible thermochromic luminescence, with strong orange emission for 1 and 2, but weaker for 3 at room temperature, whereas upon cooling at 77 K 1 and 2 show stronger yellow emission, and 3 displays stronger green emission. DFT calculations have been used to rationalize these observations. These results suggest a high potential for this novel and promising stimuli-responsive materials.
DescripciónPMCID: PMC5166966.
Versión del editorhttps://doi.org/10.1002/chem.201603675
Identificadoresdoi: 10.1002/chem.201603675
e-issn: 1521-3765
e-issn: 0947-6539
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