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Design of luminescent complexes with different CuI cores based on pyridyl phenoxarsines. | LitMetric
A series of luminescent CuI clusters with stair-step, cubane, and octahedral geometries supported by a novel type of cyclic As,N-ligand, pyridyl-containing 10-phenoxarsines, were synthesized and characterized by NMR spectroscopy, mass spectrometry, elemental analysis, and single-crystal X-ray diffraction analysis. An unusual arrangement of As,N-bidentate and μ-iodo ligands was found in the octahedral cluster. The structural diversity of the Cu(I) complexes is reflected in their photophysical properties: the phosphorescence spectra of the compounds display emission in a broad spectral range of 495-597 nm. The complex with the CuIL stoichiometry bearing a stair-step CuI core demonstrates temperature-dependent dual emission. The luminescence properties of all complexes were rationalized by DFT calculations.
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