Ligand Influence on the Photophysical Properties and Electronic Structures of Tungsten Iodide Clusters. Issue 45 (4th December 2017)

• Record Type: Journal Article
• Authors: Seyboldt, Alexander; Enseling, David; Jüstel, Thomas; Ivanović, Milutin; Peisert, Heiko; Chassé, Thomas; Meyer, H.‐Jürgen
• Is Part Of: European journal of inorganic chemistry. Issue 45(2017)
• Page Start: 5387
• Page End: 5394
• Publication Date: 2017-12-04
• Subjects: Tungsten -- Cluster compounds -- Luminescence -- Oxygen quenching -- Electronic structure; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201700910
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Compounds containing the [Mo6 I8 L6 ] 2– ion in which L is an inorganic or organic ligand show remarkable photophysical properties. Similar properties were observed for the corresponding compounds based on octahedral tungsten clusters. The properties of these photosensitizers are significantly impacted by the six outer iodide ligands of [W6 I8 I6 ] 2– . To analyze the role of the outer ligands, we prepared and structurally characterized octahedral tungsten cluster compounds with [W6 I8 I6 ] 2– and [M6 I8 L6 ] 2– ions (M = W, Mo; L = para ‐toluenesulfonate). The distinct photophysical properties of the clusters were analyzed with respect to their photoluminescence (i.e., phosphorescence) and luminescence quenching in the presence of molecular oxygen. The electronic structures were analyzed through photoelectron spectroscopy to expose differences in the electronic situations of the compounds. Abstract : Significant differences in the phosphorescence‐quenching behavior owing to molecular O2 and the electronic structures are shown by the all‐iodide cluster [W6 I14 ] 2– in comparison to those of the ligand‐substituted [W6 I8 L6 ] 2– and [Mo6 I8 L6 ] 2– clusters (exemplified by L = toluenesulfonate).