A new route to constructing rhenium(I)-based 8-hydroxyquinolate complexes: Synthesis, structures and luminescent properties

Three Re(I)-based complexes [fac-Re(CO)(3)(hyq)(pim)] (1, Hhyq = 8-hydroxyquinoline; pim = 2-phenylimidazole), [fac-Re(CO)(3)(hyq)(im)] (2, im = imidazole), [fac-Re(CO)(3)(hyq)(hyp)] (3, hyp = 4-hydroxypyridine) were synthesized by reacting Re2CO10 with 8-hydroxyquinoline, and three different monodentate N-donor species, respectively, under hydrothermal conditions. They were characterized by single-crystal X-ray diffraction and powder X-ray diffraction analyses, H-1 NMR, Mass, and infra-red spectra. The UV visible and solid-state photo-luminescent properties were investigated for complexes 1-3 and they showed modest emission intensities. We envisage that these compounds can be further developed for future opto-electronic applications. (C) 2018 Elsevier B.V. All rights reserved.