摘要
合成了两种膦酰基离子液体,1-丁基-3-(3-二苯基膦酰基)丙基咪唑六氟磷酸盐([BIMC3P(O)Ph2]PF6)(IL-1)和(3-二苯基膦酰基)-丙基三乙胺六氟磷酸盐([TEAC3P(O)Ph2]PF6)(IL-2),通过核磁共振和红外光谱确认了它们的结构,并合成了两种离子液体的稀土铕配合物Eu(IL-1)3(NO3)3和Eu(IL-2)3(NO3)3,对其进行了热稳定性和光谱性质的表征。热重分析表明,离子液体的热稳定性均高于其稀土配合物,相比之下,离子液体IL-1和Eu(IL-1)3(NO3)3具有更好的热稳定性。从红外光谱中可以看出,形成配合物后,两种离子液体中的PO吸收峰均向低波数方向移动,同时两种配合物的紫外吸收强度均大于各自游离的离子液体,说明Eu3+和离子液体中的磷酰基发生了配位。稀土铕配合物Eu(IL-1)3(NO3)3和Eu(IL-2)3(NO3)3的荧光光谱均表现出Eu3+的特征红光,峰形尖锐,单色性好,可作为潜在的红色发光材料。
Two ionic liquids with phosphoryl group, 1-butyl-3-(3-diphenylphosphoryl)propyl imidazolium hexafluorophophate ( [ BIMC3 P (O) Ph2 ] PF6, IL-1 ) and ( 3-diphenylphosphoryl ) -triethylamonium hexafluorophophate( [ TEAC3P(O) Ph2 ] PF6, IL-2 ) , were synthesized and characterized by NMR and IR. Their Eu3+ complexes, Eu ( IL-1 ) 3 ( NO3 ) 3 and Eu (IL-2) 3 ( NO3 ) 3 were also synthesized. Thermal analysis shows that both ionic liquids have excellent thermal stability than their Eu3+ complexes. Upon coordination, the IR absorption of P=O group in ionic liquid complexes moves to a lower wavenumber and the intensities of UV absorption spectra of their complexes are also increased. These results clearly demonstrate that ionic liquids with phosphoryl groups are coordinated to Eu3+ ions. The fluorescence study indicates that there is a sharp and strong emission of characteristic red light of Eu3+ ion. The results show that these Eu3+ complexes are promising photoluminescent materials.
出处
《应用化学》
CAS
CSCD
北大核心
2014年第12期1434-1440,共7页
Chinese Journal of Applied Chemistry
基金
浙江省自然科学基金资助项目(Y4100113)
2013年浙江省大学生新苗人才计划(2013R405002)~~
关键词
离子液体
铕配合物
光致发光
膦酰基
ionic liquid, europium complex, photoluminescence, phosphoryl group