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Syntheses, Structures and Luminescent Properties of Metal Halide Complexes Containing 2,3‐Diphenylquinoxaline
Author(s) -
Yeh ChunWei,
Ray Umasankar,
Chen JhyDer
Publication year - 2009
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200900175
Subject(s) - chemistry , crystallography , halide , dimer , stacking , ligand (biochemistry) , molecule , metal halides , metal , luminescence , coordination geometry , stereochemistry , inorganic chemistry , hydrogen bond , biochemistry , physics , receptor , optoelectronics , organic chemistry
The reaction of CuI with 2,3‐diphenylquinoxaline ( L ) in 1:1 mole proportion in CH 3 CN/THF afforded the dinuclear complex [CuI( L )] 2 , 1 , whereas the reactions of MX 2 (M = Cu; Hg) with L in 1:2 mole proportion in CH 3 OH gave the mononuclear complexes CuX 2 ( L ) 2 (X = Cl, 2 ; Br, 3 ) and HgX 2 ( L ) 2 (X = Cl, 4 ; Br, 5 ). Formulations of all the complexes were determined on the basis of X‐ray crystallography, elemental, IR‐ and emission spectroscopy. X‐ray examination revealed that complex 1 forms the μ,μ‐iodobridged dimer with distorted trigonal planar geometry through coordination of L ligand by one nitrogen atom to the Cu(I) center. The metal centers of complexes 2 and 3 form distorted square planar geometry while those of complexes 4 and 5 form linear geometry. The molecules of these complexes are interlinked through C‐H—π and/or π‐π stacking and anion—π interactions that form the packed structure. All the complexes exhibit emissions which may be tentatively assigned as intraligand (IL) π r̊ π* transitions.