Study on a Rhenium(I) complex with oxadiazole-derived diamine ligand: Synthesis, characterization, photophysical property and luminescence response towards molecular oxygen

► An oxadiazole-derived diamine ligand and its Re(I) complex. ► Crystal structure, photophysical property and electronic nature are investigated. ► It owns a long excited state lifetime favoring oxygen sensing. ► It was doped into a polymer matrix to give composite nanofibers. ► A maximum sensitivity of 7.07 with short response time of 5 s is realized.