A Two-coordinate Copper(I) Complex Constructed from Cyanuric Acid and 4,4′-Bipyridyl: Synthesis, Structure and Photoluminescence

Abstract

A two-coordinate copper(I) complex, Cu 2 (bipy)(H 2 L) 2 (1) (H 3 L＝cyanuric acid, bipy＝4,4'-bipyridyl), which exhibits strong photoluminescence, has been synthesized under hydrothermal conditions and structurally characterized by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P2 1 /n, with cell parameters: M r ＝539.42, a＝13.4806 (5)

Tuning luminescence via transition metal-directed strategy in coordination polymers

“…11 The emission wavelength (421 nm) of the free bpy ligand is far shorter than those of compounds 2-4 and therefore it has essentially little contribution to the luminescence of 2-4. 12 The emissions of compounds 5 and 6 exhibit blue-shifts with respect to the free bpy ligand. It should be pointed out that since Zn 2+ and Cd 2+ ions are difficult to oxidize or reduce due to the features of their electronic configurations, the emission bands of compounds 5 and 6 are neither metal-toligand charge transfer (MLCT) nor ligand-to-metal charge transfer (LMCT) in nature.…”

“…Obviously, the red shifts of the fluorescence are considered to mainly arise from the coordination of metal atom to ligand and the hydrogen interactions. [11][12][13][14][15] It is worth mentioning that 2 shows much weaker PL intensity and a narrow band compared with 3-6, which is most probably attributed to the effect of the metal centre when Co 2+ coordinated to the H 3 L ligand (Fig. S7 †).…”