稀土卤化物/离子液体软发光材料的合成及其发光性能研究
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摘要
利用[Bmim][Br]为溶剂,合成了新型稀土发光软材料Ce∶[Bmim][LaBr_4]/[Bmim][Br]([Bmim][Br]=1-丁基-3-甲基咪唑溴),探讨了温度、原料配比等因素对稀土配合物Ce∶[Bmim][LaBr_4]合成的影响。室温下测量了Ce∶[Bmim][LaBr_4]/[Bmim][Br]的光致发光光谱、光致发射衰减时间、X射线激发发射光谱等,结果表明:在320 nm紫外光激发下,350～450 nm的区间内有两个发射峰,发射峰的峰值分别位于377 nm和406 nm,其光致发射衰减时间为10 ns和31 ns,并且X射线激发下,具有较宽的发射光谱。
A new rare earth luminescent soft material Ce ∶ [Bmim][LaBr_4]/[Bmim][Br]( [Bmim][Br] = 1-butyl-3-methylimidazolium bromide) was synthesized using [Bmim][Br] as solvent. The effects of temperature,raw material ratio and other factors on the synthesis of rare earth complex Ce∶[Bmim][LaBr_4] were discussed. The photoluminescence spectrum,photoluminescence decay time and X-ray excitation emission spectrum of Ce ∶ [Bmim][LaBr_4]/[Bmim][Br] were measured at room temperature. The results show that when it excited by 320 nm ultraviolet light,there are two emission peaks in the range of 350-450 nm,which positions are located at 377 nm and 406 nm,respectively. The photoluminescence decay times are 10 ns and 31 ns,and the X-ray excitation has a broad emission spectrum.
A new rare earth luminescent soft material Ce ∶ [Bmim][LaBr_4]/[Bmim][Br]( [Bmim][Br] = 1-butyl-3-methylimidazolium bromide) was synthesized using [Bmim][Br] as solvent. The effects of temperature,raw material ratio and other factors on the synthesis of rare earth complex Ce∶[Bmim][LaBr_4] were discussed. The photoluminescence spectrum,photoluminescence decay time and X-ray excitation emission spectrum of Ce ∶ [Bmim][LaBr_4]/[Bmim][Br] were measured at room temperature. The results show that when it excited by 320 nm ultraviolet light,there are two emission peaks in the range of 350-450 nm,which positions are located at 377 nm and 406 nm,respectively. The photoluminescence decay times are 10 ns and 31 ns,and the X-ray excitation has a broad emission spectrum.
引文
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[3]徐兰兰,孙丛婷,薛冬峰.稀土闪烁晶体研究进展[J].中国科学:技术科学,2016,46(7):657.
[4]丁言国,包汉波,李正国,等.La Br3∶Ce晶体生长及物理特性的研究[J].硅酸盐通报,2014,33(3):476-481.
[5]王海丽,陈建荣,李辉,等.La Br3∶Ce闪烁晶体的生长及性能研究[J].人工晶体学报,2018,44(6):1192-1196.
[6]任国浩,杨帆.卤化物闪烁晶体的研究历史和现状[J].中国科学:技术科学,2017(11):43-58.
[7]李焕荣,王天任.基于稀土配合物和离子液体的新型稀土发光材料研究进展[J].发光学报,2018(4):425-439.
[8]Tang S,Babai A,Mudring A V.Europium-based Ionic Liquids as Luminescent Soft Materials[J].Angewandte Chemie International Edition,2008,47(40):7631-7634.
[9]Yi S,Wang J,Chen X.Enhanced Energy Transfer Efficiency and Stability of Europiumβ-diketonate Complex in Ionic Liquid-based Lyotropic Liquid Crystals[J].Physical Chemistry Chemical Physics,2015,17(31):20322-20330.
[10]Li H R,Liu P,Shao H F,et al.Green Synthesis of Luminescent Soft Materials Derived from Task-specific Ionic Liquid for Solubilizing Lanthanide Oxides and Organic Ligand[J].Journal of Materials Chemistry,2009,19,5533-5540.
[11]Li H,Shao H,Wang Y,et al.Soft Material with Intense Photoluminescence Obtained by Dissolving Eu2O3and Organic Ligand into a Taskspecific Ionic Liquid[J].Chemical Communications,2008,41(41):5209-5211.
[12]Wasserscheid P,Keim W.Ionic Liquids-New"Solutions"for Transition Metal Catalysis[J].Angewandte Chemie International Edition,2000,39(21):3772-3789.
[13]张文秀,陈永杰,李行,等.微波法合成1-丁基-3-甲基咪唑溴盐[J].沈阳化工大学学报,2012,26(1):9-12.
[14]Peter Nockemann,Eva Beurer,Kris Driesen.et al.Photostability of a Highly Luminescent Europiumβ-diketonate Complex in Imidazolium Ionic Liquids[J].Chem.Commun.2005,4354-4356.
[15]任国浩,裴钰,吴云涛,等.铈离子掺杂浓度对氯化镧(La Cl3∶Ce)闪烁晶体发光性能的影响[J].物理学报,2014,63(3):392-397.
[16]Chaminade J P,Viraphong O,Guillen F,et al.Crystal Growth and Optical Properties of New Neutron Detectors Ce3+∶Li6R(BO3)3,(R=Gd,Y)[J].IEEE Transactions on Nuclear Science,2001,48(4):1158-1161.
[17]Bizarri G,Haas J T M D,Dorenbos P,et al.First Time Measurement of Gamma-ray Excited La Br3∶5%Ce3+,and La Cl3∶10%Ce3+Temperature Dependent Properties[J].Physica Status Solidi,2010,203(5):R41-R43.