Crystal structure, optical properties and electrochemiluminescence of Cu(I), Ag(I) and Au(I) complexes that contain the cyanoacetic acid triphenylamine ligand. (17th June 2015)

• Record Type: Journal Article
• Authors: Li, Dandan; Sun, Xianshun; Shao, Nanqi; Zhang, Guocui; Li, Shengli; Zhou, Hongping; Wu, Jieying; Tian, Yupeng
• Is Part Of: Polyhedron. Volume 93(2015)
• Page Start: 17
• Page End: 22
• Publication Date: 2015-06-17
• Subjects: Free ligand -- Metal complexes -- Crystal structure -- Optical properties -- Electrochemiluminescence; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2015.03.027
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: 1 –3 exhibited a highly enhanced stable ECL emission compared toL . Especially, the ECL intensity of1 is approximately 30 times greater than that ofL . This implies that the introduction of heavy metals strengthens the spin–orbit coupling effect, improves the luminous efficiency of the materials and then enhances the ECL emission. Abstract: A series of novel metal complexes, [Cu2 (dppm)2 (OOCL)]2 [NO3 ]2 (1 ), [Ag2 (dppm)2 (OOCL)2 ] (2 ) and [Au2 (dppm)2 (OOCL)2 ] (3 ) (dppm = bis(diphenylphosphino)methane, L = 2-cyano-3-(4-(diphenylamino) phenyl)acrylic acid) were prepared and structurally characterized by X-ray crystallography. Their optical properties were investigated by absorption and fluorescence spectra. The fluorescence spectra of the complexes showed red shifts relative to that ofL, which exhibited the same tendency as the absorption spectra. In addition, the ability of1 –3 to generate electrochemiluminescence (ECL) were assessed in acetonitrile solutions, they exhibited a highly enhanced stable ECL emission compared to the free ligand (L ). Especially, the ECL intensity of1 was approximately 30 times greater than that ofL .