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作 者:董高云[1] 李睿[1] 樊婷婷[1] 李佳佳[1] 李夏[1]
出 处:《高等学校化学学报》2016年第8期1421-1429,共9页Chemical Journal of Chinese Universities
基 金:国家自然科学基金(批准号:21471104)资助~~
摘 要:采用水热法合成了5个稀土配合物[Sm2(bdbc)2(phen)4](1)和[Ln(bdbc)(phen)(H2O)][Ln=Eu(2),Gd(3),Tb(4),Dy(5),bdbc=(2-羧基苯氧基)苯-1,2-二羧酸根,phen=1,10-邻菲啰啉].配合物1是双核分子,通过氢键和C—H…π作用进一步构筑成一维超分子结构;配合物2~5是同构的一维双螺旋结构,通过氢键和C—H…π作用进一步构筑成三维超分子结构.配合物1,2,4和5呈现了Sm^(3+),Eu^(3+),Tb^(3+)和Dy^(3+)离子的特征发射,分别对应于Sm^(3+)离子的4G5/2→6HJ/2(J=5,7,9)、Eu^(3+)离子的5D0→7FJ(J=1—4)、Tb^(3+)离子的5D4→7FJ(J=6,5,4,3)和Dy^(3+)离子的4F5/2→6HJ/2(J=15,13)跃迁.对配合物4的荧光性质进行了表征,结果表明,配合物4可用作荧光探针以检测阳离子和苯甲醛.Five lanthanide-organic frameworks,[Sm2( bdbc)2( phen)4]( 1) and [Ln( bdbc)( phen) ·( H2O) ][Ln = Eu( 2),Gd( 3),Tb( 4),Dy( 5),bdbc = 3-( 2-carboxy-phenoxy) phthalicate,phen = 1,10-phenanthroline],have been synthesized and determined by X-ray single-crystal diffraction. Complex 1 is a binuclear molecule and forms a one-dimensional( 1D) supramolecular architecture via hydrogen and C—H…πbonds. Complexes 2—5 are isostructural and display a one-dimensional( 1D) chain structure,which form a three-dimensional( 3D) supramolecular architecture via hydrogen and C—H … π bonds. Complexes 1,2,4and 5 present the characteristic emission of Sm^3+,Eu^3+,Tb^3+and Dy^3+,which are attributed to4G5/2→6HJ/2( J =5,7,9) transitions of Sm^3+,5D0→7FJ( J =1—4) transitions of Eu^3+,5D4→7FJ( J =6,5,4,3) transitions of Tb^3+,4F5/2→6HJ/2( J = 15,13) transitions of Dy^3+,respectively. Furthermore,the luminescence properties of complex 4 were investigated. The results show that complex 4 may be used as a fluorescent probe to detect cation in aqueous solution and benzaldehyde.
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