Eu3+,Tb3+混配配合物的激光诱导荧光

利用激光诱导荧光技术研究了两种三价稀土金属离子的β－二酮与有机配体混配络合物中金属离子的寿命及其能级结构，得到了Ｅｕ＾３＋的能级常数。     

Physics-based detection of man-made elastic objects buried in high-density-clutter areas of saturated sediments

At low-to-mid frequencies (1-15 kHz), sound penetrates better into lossy saturated sediments such as sandy seabeds than at the higher frequencies typical of many sonar systems. At the lower frequencies the signature of a man-made object, such as an oil can or a mine, is characterized by relatively strong elastic components that may help in detecting the object when partially or totally buried in high-density-clutter areas. Using simulations, we studied the low frequency elastic response of representative elastic objects such as spherical and cylindrical shells. This was done by selecting the strongest elastic waves supported and predicting how their characteristics (i.e., dispersion and attenuation) change as the bottom type or the object’s burial depth varies. Based on this study, experimental results of physics-based detection of man-made buried objects are shown. At-sea data were selected from the measurements conducted during the GOATS’98 trial in a cluttered, sandy seabed area in coastal waters.     

Tb~（3＋），Ce~（3＋）离子在Al_6Si_2O_（13）中的光致发光

采用溶胶－凝胶法合成了以Ａｌ６Ｓｉ２Ｏ１３为基质，掺杂Ｔｂ３＋，Ｃｅ３＋的发光材料．经ＸＲＤ结构分析表明，晶体结构属于正交晶系，其晶胞参数为ａ＝０．７５９５ｎｍ，ｂ＝０．７７５６ｎｍ，ｃ＝０．２８８２ｎｍ．测定了发光材料的激发和发射光谱，研究了从溶胶向凝胶及凝胶向发光体的转变过程．通过实验确定了材料的最佳组成．     

光纤中的磁性光学效应

以自制具有强法拉弟效应的磁敏光纤研究光沿光纤传输过程中的法拉弟旋光效应，得到旋光系数，衰减系数，性能指数等指标，基于Ｍａｘｗｅｌｌ方程并考虑到光纤中的各向异性，引入张量介电常数，建立了耦合波方程及圆柱坐标中的Ｈｅｌｍｈｏｌｔｚ方程，解出光纤中传输的波为成对出现的孪生耦合波，耦合波内相位常数不同，形成光在光纤中传输时的旋光特性。     

Y1.9SiO5:Tb3+0.1发光材料的制备及其发光性能研究

采用溶胶-凝胶法制备Y1.9SiO5:Tb3+0.1发光材料,并在250～1000℃不同温度下进行煅烧.通过对此样品在不同温度下激发光谱、发射光谱、红外光谱以及X衍射图谱进行研究,发射谱中625nm、587nm、545nm、442nm处显示了Tb的5D4-7Fj(j=3,4,5,6)的特征跃迁,491nm处显示了5D3-7F6的特征跃迁.红外和X衍射图都显示500℃是样品从无定形到晶形的温度变化点,800℃时晶体稳定且晶形最好.无定形态时样品的荧光强度随温度升高而降低,而晶态时其荧光强度随温度变化趋势正好相反.说明无定形态时,Tb3+主要处于无反演中心格位;而在晶态结构中,Tb3+主要处于反演中心格位.     

配位场中f^8组态f—f跃迁荧光光谱与荧光中心点对称性的关系

根据Judd-Ofelt原理和配位场理论,运用群论方法计算了在32点群中f~8电子组态的f-f电偶极跃迁从第一激发态到基态(~5D_4→~7F_J)可能的跃迁总数和电偶极跃迁允许的总数,计算结果为用荧光光谱法研究Tb(Ⅲ)离子的配位场点对称性提供了系统的参考数据。     

Luminescent Eu(III) and Tb(III) Complexes: Developing Lanthanide Luminescent-Based Devices

This mini review gives some highlights of the work recently carried out in our research group in Dublin on the developments of lanthanide luminescent devices, where the future goal is to produce devices that can operate as sensors. A few examples demonstrate our design principles for targeting both anion and cations that are of biological or pharmaceutical relevance, where the recognition occurs in aqueous competitive media. We also discuss the possibility of developing mixed f-d metal complexes and conjugates that can be employed as novel supramolecular architectures.     

The Study on the Interaction between Tm~(3 ) and Tb~(3 ) Rare Earth Ions in YVO_4 Crystal

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｔｈｅｌａｓｉｎｇｐｅｒｆｏｒｍａｎｃｅｓｏｆｒａｒｅ ｅａｒｔｈｉｏｎＴｍ3 ｄｏｐｅｄｌａｓｅｒｃｒｙｓｔａｌｓａｔ～ 2 .3 μｍａｎｄ～1 .9μｍｗａｖｅｌｅｎｇｔｈ ,ｃｏｒｒｅｓｐｏｎｄｉｎｇｔｏ3Ｈ4→3Ｈ5 ａｎｄ3Ｆ4→ 3Ｈ6 ｔｒａｎｓｉｔｉｏｎｓｗｅｒｅｓｔｕｄｉｅｄｂｙＪ .Ａ .Ｃａｉｒｄ[1] ａｎｄＬ .Ｆ .Ｊｏｈｎｓｏｎ[2 ] .ＲｅｃｅｎｔｌｙＦ .Ｓ .Ｅｒｍｅｎｅｕｘ[3] ｓｕｇｇｅｓｔｅｄｔｈｅｌａｓｉｎｇｐｏｓｓｉｂｉｌｉｔｉｅｓｏｆＴｍ3 ｄｏｐｅｄｌａｓｅｒｃ…     

基于稀土复合纳米粒子的新型荧光共振能量移体系的建立及研究

采用简便的超声合成方法,成功的制备了稀土复合纳米粒子Tb/acety acetone(acac)/Polyacrylamide(PAM).该复合纳米粒子具有较高的稳定性,良好的分散性.基于该稀土复合纳米粒子为供体,罗丹明B为受体,建立了一种新型高效的荧光共振能量转移(FRET)体系.实验结果表明该供体-受体对之间具有较高的能量转移效率.