Untraviolet-Radiation-Induced Irreversible Single-Crystal-to-Single-Crystal Transformation and Spect

• 作 者: JingZhang;JingLi;YouSong;
• 机 构: State Key Laboratory of Coordination Chemistry,School of Chemistry and Chemical Engineering,Nanjing
• 出 处: 2018中西部地区无机化学化工学术研讨会
• 发表日期: 2018年期

　　Since the first Eu3+-β-diketonate complex was discovered by Weissmna in 1942 which emitted luminescence,lanthanide based fluorescent complexes have been intensively studied owing to their unique spectral properties,which is promising for application in a wide variety of areas.Recently,Europium and terbium β-diketonate complexes [Ln(tfnb)3(bpete)](Ln=Eu,Tb)were synthesized by our group,where tfnb-and bpete stand for 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione and and 1,2-bis(4-pyridyl)ethylene respectively.It was found that the crystal structures underwent a single-crystal-to-single-crystal transformation under UV irradiation,which is determined by single-crystal X-ray diffraction.Spectral properties were also studied,showing that Eu(tfnb)3(bpete)emitted enhanced luminescence after irradiation,while Tb(tfnb)3(bpete)did not emit luminescence either before irradiation or after.The mechanism for this was investigated,giving a deeper insight into the structural-spectral relationships of the lanthanide β-diketonate complexes.