Synthesis and fluorescence properties of 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazol derivatives and their terbium complexes.
Eight novel 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazol derivatives have been designed and synthesized, and their corresponding Tb(3+) complexes were also prepared successfully. The fluorescence properties and fluorescence quantum yields of the target complexes were investigated, the results showed that the ligands were an efficient sensitizer for Tb(3+) luminescence, and the target complexes exhibited characteristic fluorescence emissions of Tb(3+) ion. The fluorescence intensity of the complex substituted by chlorine was stronger than that of other complexes. The substituents' nature has a great effect upon the electrochemical properties of the target complexes. The results showed that the introduction of the electron-withdrawing groups tended to decrease the oxidation potential and highest occupied molecular orbital energy levels of the target Tb(3+) complexes; however, introduction of the electron-donating groups can increase the corresponding complexes' oxidation potential and highest occupied molecular orbital energy levels.
School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
Wu
W
Zhang
Yuchao
Y
Chai
Kangyun
K
Li
Yanwen
Y
Chen
Dong
D
Yan
Dongcai
D
Guo
D060326:Chemistry Techniques, Synthetic; D002713:Chlorine / Q000737:chemistry; D055664:Electrochemical Techniques; D005453:Fluorescence; D015394:Molecular Structure; D012995:Solubility; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013329:Structure-Activity Relationship; D013725:Terbium / Q000737:chemistry*; D013830:Thiadiazoles / Q000138:chemical synthesis / Q000737:chemistry*
D013830:Thiadiazoles; D013725:Terbium; D002713:Chlorine
1,2,4-Triazoles; electrochemical properties; fluorescence properties; synthesis; terbium complex