Tunable luminescence of cyclometallated platinum(II) derivatives based on novel pyrimidine-contained tridentate Pt(NˆCˆN)Cl complexes. (June 2017) - Li, Xianying
Abstract: Two novel tridentate Pt(NˆCˆN)Cl complexes, 1a and2a, with an electron-deficient pyrimidine-contained NˆCˆN tridentate ligand, were synthesized and characterized. Single crystal X-ray diffraction of1a revealed a cyclometallated square-planar geometry. In the single crystal, 1a adopted a head-to-head dimeric form with the shortest Pt⋯Pt distance of 4.22 Å and π–π stacking affording one-dimensional nanostructure along a -axial direction. Interestingly, in contrast to1a, Pt⋯Pt interaction of2a, with a flexible alkyl chain substituent, could be induced by facile solution processable self-assembly, allowing for modulation of luminescence from visible to near-IR (NIR) region. Graphical abstract: