The Effect of Hg(II) on the Optical Characteristics of Cycloiridated 2-Phenylbenzothiazole Complexes with Chelating Ligands Containing Sulfur Donor Atoms

• Published in: Optics and spectroscopy Vol. 120; no. 3; pp. 390 - 394
• Main Authors: Katlenok, E. A., Balashev, K. P.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.03.2016
• Subjects: Condensed-Matter Spectroscopy; Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Dalton Trans; Diethyldithiocarbamate; Iridium; Hypsochromic Shift; Phosphore
• ISSN: 0030-400X; 1562-6911
• DOI: 10.1134/S0030400X16030140

The [Ir(bt) 2 (S^S)], [Ir(bt) 2 (S^N)], and [Ir(bt) 2 (CH 3 CN) 2 ]PF 6 complexes, where (bt) − is a deprotonated form of 2-phenylbenzothiazole and (S^S) − and (S^N) − are diethyldithiocarbamate, O -ethyldithiocarbonate, 2-mercaptobenzothiazolate, 2-mercaptobenzoxazolate, and 2-mercaptopyridinate ions, and the effect of Hg(II), Cu(II), Cd(II), and Zn(II) cations on the optical characteristics of these complexes are studied by electron absorption spectroscopy and emission spectroscopy. A hypsochromic shift of the absorption and phosphorescence bands of complexes in substituting the (S^S) − and (S^N) − chelating ligands with acetonitrile ligands is attributed to a lower energy of d Ir orbitals compared with the mixed d Ir / p (S) orbitals. It is shown that the presence of Hg(II) cations results in a hypsochromic shift of the absorption and phosphorescence bands of complexes [Ir(bt) 2 (S^S)] and [Ir(bt) 2 (S^N)] because of an effective reaction of substitution of chelating ligands to acetonitrile ligands.