Structure and photophysical properties of a series of new 1D d 10 Coinage Metal Organic Chalcogenolates (MOCs): [M(o-SPhCO2H)]n (M = Cu, Ag, Au)
Résumé
Thiosalicylic acid is hard-soft donor ligand, able to coordinate numerous metals [1]. A significant number of coordination compounds of d10 metals have been reported. However, crystallographic studies of polymeric species stayed very limited compared to their mono- and oligomeric counterparts. For example, preparation of polymeric [Au(oSCPhCO2H)]n has been reported [2], as well as polymeric compounds of silver thiosalicylate [3], but no crystallographic structure was reported. A number of Cu(II) thiosalicylates [4], a mixed-valence Cu(I)2Cu(II) complex [5] and no Cu(I) complexes have been described up to our knowledge. In most cases structural studies are precluded due to the strong affinity between sulfur and coinage metals, inducing a rapid precipitation of coordination polymers making single crystals hardly obtainable. In presented work, we report extensive pioneering structural study of three polymeric species of Cu(I), Au(I) and Ag(I). Structural study was performed by means of powder X-ray diffraction and PDF (pair distribution function) calculations. These coordination polymers have similar 1D structures. Based on this fact, we are able to discuss the influence of the structure and the nature of the metallic ion on photophysical properties of these materials. They emin in orange to NIR part of the spectrum. High quantum yields make them interesting for illumination and as NIR-emitters.
[1] T. Wehr-Candler et al. Coord. Chem. Rev. 2016, 313, 111.
[2] R.E. Bachman et al. Z. Naturforsch. 2009, 64B, 1491.
[3] K. Nomiya et al. J. Inorg. Biochem. 1995, 58, 255.
[4] See for example M.S. Abu-Bakr, Monatsh. Chem. 1997, 128, 563.
[5] R.C. Bott et al. Chem. Commun. 1998, 2403.