CAJ | 학술논문

合成了两种新的配合物｛[Eu3（bidc）4（phen）2（NO3）]·2H2O｝n（1）和[Tb2（bidc）3（H2O）2]（2）（bidc＝苯并咪唑二羧酸根，phen＝1，10‐邻菲啰啉）。配合物1是链状结构，含有三种不同的金属离子配位环境：Eu（1）O6 N2，Eu（2）O8和Eu（3）O6 N2。配合物2是二维网状结构，含有两种配位环境相似的金属离子：Tb （1）O8和Tb（2）O8。配合物1在581，593，615，654和702 nm处出现发射峰，为Eu3＋的5 D0→7 FJ （J＝0－4）跃迁产生的特征荧光。最强发射峰位于615 nm ，对应于5 D0→7 F2跃迁，为红光。跃迁强度 I（5 D0→7 F2）∶I（5 D0→7 F1）约为2.5，说明Eu3＋不处于反演中心。配合物2在490，545，584和622 nm出现发射峰，归属为中心T b3＋的5 D4→7 FJ （ J＝6－3）跃迁产生的特征荧光。在545 nm的发射最强，对应于5 D4→7 F5跃迁，为绿光。探讨了不同溶剂对配合物1和2荧光的影响。实验结果表明硝基苯对配合物1和2具有显著的荧光猝灭作用，因此配合物1和2可用于环境污染物硝基苯的检测。
합성료량충신적배합물｛[Eu3（bidc）4（phen）2（NO3）]·2H2O｝n（1）화[Tb2（bidc）3（H2O）2]（2）（bidc＝분병미서이최산근，phen＝1，10‐린비라람）。배합물1시련상결구，함유삼충불동적금속리자배위배경：Eu（1）O6 N2，Eu（2）O8화Eu（3）O6 N2。배합물2시이유망상결구，함유량충배위배경상사적금속리자：Tb （1）O8화Tb（2）O8。배합물1재581，593，615，654화702 nm처출현발사봉，위Eu3＋적5 D0→7 FJ （J＝0－4）약천산생적특정형광。최강발사봉위우615 nm ，대응우5 D0→7 F2약천，위홍광。약천강도 I（5 D0→7 F2）∶I（5 D0→7 F1）약위2.5，설명Eu3＋불처우반연중심。배합물2재490，545，584화622 nm출현발사봉，귀속위중심T b3＋적5 D4→7 FJ （ J＝6－3）약천산생적특정형광。재545 nm적발사최강，대응우5 D4→7 F5약천，위록광。탐토료불동용제대배합물1화2형광적영향。실험결과표명초기분대배합물1화2구유현저적형광졸멸작용，인차배합물1화2가용우배경오염물초기분적검측。
Two new complexes ,{[Eu3(bidc)4(phen)2(NO3)]·2H2O}n(1)and [Tb2(bidc)3(H2O)2](2)(bidc=benzimidazole‐dicarboxylate ,phen=1 ,10‐phenanthrolIne) were synthesized .Complex 1 shows 1D chain structure .The asymmetric unit of 1 contains three crystallographically different Eu3+ ,Eu (1)O6 N2 ,Eu(2)O8 and Eu(3)O6 N2 .Complex 2 reveals 2D structure .It contains two crystallographically similar Tb3+ ,Tb(1)O8 and Tb(2)O8 .Complex 1 displays the emission peaks at 581 ,593 , 615 ,654 and 702 nm ,corresponding to the 5 D0 → 7 FJ (J=0-4) transitions of Eu3+ .The most intense emission at 615 nm is at‐tributed to the 5 D0 → 7 F2 transition ,implies a red emission light of 1 .The intensity rations I(5 D0/7 F2 )/I(5 D0/7 F1 ) is about 2 . 5 ,indicating the chemical environment around Eu3+ does not have an inversion center .Complex 2 exhibits four emission peaks at 492 ,545 ,584 and 622 nm ,corresponding to the 5 D4 → 7 FJ (J=6-3) transitions of Tb3+ .The emission band at 545 nm corre‐sponds to the 5 D4 → 7 F5 transition of the Tb3+ ,which gives an intense green luminescence output for the solid sample .Notably , the solvent‐dependent luminescence behavior of complexes 1 and 2 was discussed .They show highly selective for nitrobenzene via a fluorescence quenching mechanism .The highly selective and sensitive sensing nitrobenzene leads to its application in environ‐mental system .