A new copper(I) coordination polymer from 2,6-bis(1H-benzotriazol-1-ylmethyl)pyridine: Synthesis,characterization, and use as additive in transparent submicron UV filters |
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Authors: | Nelson Nuñez-Dallos Natalia Lopez-Barbosa Alvaro Muñoz-Castro Desmond Mac-Leod Carey Assunta De Nisi Magda Monari |
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Affiliation: | 1. Department of Chemistry, Universidad de los Andes, Bogotá, Colombia;2. Department of Electrical and Electronics Engineering, Universidad de los Andes, CMUA, Bogotá, Colombia;3. Facultad de Ingeniería, Centro de Química Inorgánica y Materiales Moleculares, Instituto de Ciencias Químicas Aplicadas, Universidad Autonoma de Chile, Santiago, Chile;4. Doctorado de Fisicoquímica Molecular, Relativistic Molecular Physics (ReMoPh) Group, Universidad Andres Bello, Santiago, Chile;5. Dipartimento di Chimica G. Ciamician, Università di Bologna, Bologna, Italy |
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Abstract: | The use of a new copper(I) coordination polymer (CP) as additive in transparent composite films of 190 nm of thickness for ultraviolet (UV) shielding is presented. The luminescent 1-D Cu(I) CP was easily synthesized through a self-assembly process between Cu(I) iodide and 2,6-bis(1H-benzotriazol-1-ylmethyl)pyridine (L). The CP, [Cu2(μ ? I)2(μ ? L)2]n, was structurally characterized by infrared, UV–visible diffuse reflectance and photoluminescence spectroscopy, elemental and thermogravimetric analyses, single-crystal and powder X-ray diffraction, and relativistic density functional theory calculations. The CP was dispersed and immobilized into a polymeric matrix in the presence of Sudan I, yielding a composite material that exhibits a reduction of 49% of the UV transmittance at 350 nm. Thus, the use of a new Cu(I) CP in polymeric composite films appears as a novel approach toward ultrathin and transparent UV shielding films, which have potential applications as protection layers of paints and coatings that tend to degrade when exposed to UV radiation. |
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Keywords: | Copper(I) coordination polymer crystal structure luminescence polymeric composites ultraviolet filters |
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