906009-33-4Relevant academic research and scientific papers
Energy transfer pathways in the carbazole functionalized β-diketonate europium complexes
Nie, Daobo,Chen, Zhuqi,Bian, Zuqiang,Zhou, Jianqiang,Liu, Zhiwei,Chen, Fangfang,Zhao, Yongliang,Huang, Chunhui
, p. 1639 - 1646 (2007)
Two novel Eu3+ complexes Eu(CDBM)3·2H 2O and Eu(CCDBM)3·2H2O have been synthesized (CDBM = 1-(4-(9-carbazol)phenyl)-3-phenyl-1,3-propanedione, CCDBM = 1-((4-(9-carbazol)methyl)phenyl)-3-phenyl-1,3-propanedione). Eu(CDBM) 3·2H2O showed strong internal ligand charge transfer (ILCT) fluorescence and sensitized emission of Eu3+. Due to the charge transfer character, the fluorescence band of CDBM shifted from 403 nm in cyclohexane to 559 nm in acetonitrile. Photophysical studies demonstrated that no energy was migrated from the ILCT excited state of the ligands to Eu3+, and that Eu3+ was sensitized by the triplet state which was localized in the 1,3-diphenyl-1,3-propanedione (DBM) part. The quantum efficiencies of Eu3+ in the three complexes are in the order Eu(DBM)3·2H2O > Eu(CCDBM)3· 2H2O > Eu(CDBM)3·2H2O in both solution and the solid state. The energy transfer pathways in the three Eu 3+ complexes were discussed in detail. Based on the systematic photophysical studies, a new guideline for the organo-lanthanide light emitting materials has been proposed: ILCT should be avoided during molecular modification. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Promoting near-infrared emission of neodymium complexes by tuning the singlet and triplet energy levels of β-diketonates
Yang, Lifen,Gong, Zeliang,Nie, Daobo,Lou, Bin,Bian, Zuqiang,Guan, Min,Huang, Chunhui,Lee, Hyun Joo,Baik, Woo Phil
, p. 791 - 796 (2007/10/03)
A series of neodymium complexes with various modified β-diketonates and their corresponding gadolinium complexes have been synthesized and characterized. The singlet and triplet energy levels of the coordinated ligands were measured and compared. These co
