The first discrete tetranuclear silver(I) complex containing 4-substituted (m-phenol)-1,2,4-triazole: Synthesis, structure and fluorescence

A novel triazole-bridging polynuclear silver(I) complex, [Ag4(ptr)6](NO3)4 · 4H2O (1), was synthesized with (m-phenol)-1,2,4-triazole (ptr), which is the first discrete tetranuclear complex containing 4-substituted triazoles. The compound features blue fluorescence with a broad emission at 432 nm excited at 363 nm, possibly originating from the π–π∗ transition of the triazole ring.