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Luminescent Chemisorption of Amines on Copper(I) Cyanide for Environmental Sensing Applications

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This study explores the chemisorption properties of amines on copper(I) cyanide, revealing its potential as a luminescent sensor for volatile organic compounds. Upon heating, copper(I) cyanide reacts with liquid amines to form polymeric compounds (CuCN)Ln, which can be chemiabsorbed onto bulk CuCN surfaces and removed under vacuum. The emitted luminescence under UV irradiation highlights the material's selectivity for similar amines. X-ray powder diffraction analyses provide insights into the structural changes associated with the chemiabsorbed products, shedding light on the reaction pathways involved.

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Luminescent Chemisorption of Amines on Copper(I) Cyanide for Environmental Sensing Applications

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  1. Luminescent Amine Chemisorption of Amines to Copper(I) Cyanide Robert D. Pike, Department of Chemistry, College of William & Mary Photoactive materials that are responsive to volatile organic compounds have the potential to act as environmental sensors. Copper(I) cyanide spontaneously reacts with heated liquid amines to form polymeric compounds, (CuCN)Ln. When exposed to liquid or vapor at ambient temp., (CuCN)Ln is chemisorbed onto the surface of bulk CuCN and can be removed under vacuum. Luminescence behavior has been noted for these materials (whether as surface layers or as pure compounds). Remarkable response selectivity toward similar amines has been noted. Emission of (CuCN)Ln samples under 254 nm irradiation. X-Ray powder diffraction of chemisorbed CuCN-pyridine product, comparing it to CuCN and authentic (CuCN)5(Py)4 X-ray structures of (CuCN)(2-methylpyridine), (CuCN)3(piperidine)4. Reaction pathways for CuCN + L, upper: irreversible reaction, lower: reversible chemisorption

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