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Synthesis, X‐ray Structures, and Photoluminescence of the Octahedral Cu 4 I 4 Cluster with Bulky Bidentate Bis(phosphanyl)amine Ligand
Author(s) -
AlMasri Harbi Tomah,
Almejled Akram Ali
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000058
Subject(s) - octahedron , crystallography , denticity , chemistry , ligand (biochemistry) , excited state , luminescence , photoluminescence , crystal structure , octahedral molecular geometry , materials science , biochemistry , physics , receptor , optoelectronics , nuclear physics
The reaction of C 10 H 7 ‐1‐N(PPh 2 ) 2 ( 1 ) with two equivalents of CuI in acetonitrile resulted in the formation of octahedron Cu 4 I 4 [ 1 ] 2 complex ( 2 ). The crystal structure of 2 showed it adopted a rare octahedral arrangement. The rectangular Cu 4 plane is μ 4 ‐capped by two of the iodides and is placed in axial positions above and below the Cu 4 ‐plane form an octahedron, whereas the other two iodides are bonded to two copper atoms in a μ 2 ‐fashion. The luminescence of complex 2 arises from a triplet halide‐to‐ligand charge transfer ( 3 XLCT) excited state and 3 CC (Cu 4 I 4 cluster‐centered) excited state are not involved in the luminescence by the rigid bidentate ligand 1 in spite of the short Cu I –Cu I bond length. Complex 2 was identified and characterized by multinuclear NMR ( 1 H, 13 C, 31 P NMR) and IR spectroscopy. Crystal structure determinations of 1 and 2 were carried out.