Luminescent Thermochromism of 2D Coordination Polymers Based on Copper(I) Halides with 4-Hydroxythiophenol
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- 作者：Dr. Javier Troyano ; Dr. Josefina Perles ; Dr. Pilar Amo-Ochoa ; Dr. Jose Ignacio Martí ; nez ; Prof. Maria Concepció ; n Gimeno ; Dr. Vanesa Ferná ; ndez-Moreira ; Dr. Fé ; lix Zamora and Prof. Salomé ; Delgado
- 刊名：Chemistry - A European Journal
- 出版年：2016
- 出版时间：December 12, 2016
- 年：2016
- 卷：22
- 期：50
- 页码：18027-18035
- 全文大小：3876K
- ISSN：1521-3765
文摘
Solvothermal 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.