transitions of the metal centre, with the exception of the carbazolyl derivative. Some of the ligands were also able to sensitize Tb(III) luminescence, in agreement with the triplet state energies estimated from the phosphorescence spectra of the analogous Gd(III) nitrates. On the basis of the photoluminescence results achieved using nitrate as ancillary ligand, heptacoordinate Eu(III) complexes having general
磷酰胺和芳基膦酸二酰胺配体OP(NMe 2)2 Ind,OP(NMe 2)2 Cbz,OP(NMe 2)2 Ph,OP(NMe 2)2(1-Naph)对Eu(III)发光的敏化和OP(NMe 2)2(2-Naph)(Ind =吲哚-1-基; Ph =苯基; Cbz =咔唑-9-基; 1-Naph =萘-1-基; 2-Naph =萘-2 -Eyl)通过与[Eu(NO 3)3 ]金属片段配位而得到验证。相应配合物的发射光谱仅显示5 D 0 → 7 F J除咔唑基衍生物外,金属中心的过渡。一些配体还能够敏化Tb(III)发光,这与从类似的硝酸Gd(III)的磷光光谱估计的三重态能量一致。基于使用硝酸盐作为辅助配体获得的光致发光结果,具有通式[Eu(β-dike)3 L]的七配位Eu(III)配合物(β-dike=二苯甲酰甲烷酸酯,丁酰基三氟丙酮酸酯; L =磷酰胺或芳基磷酸二酰胺配体)被准备
Dual emission from Mn(II) complexes with carbazolyl-substituted phosphoramides
作者:M. Bortoluzzi、J. Castro、V. Ferraro
DOI:10.1016/j.ica.2022.120896
日期:2022.6
The carbazolyl-substituted phosphoramide N,N,N′,N′-tetramethyl-P-carbazol-9-ylphosphonic diamide (L) was successfully coordinated to MnX2 halides (X = Cl, Br, I), obtaining tetrahedral complexes having general formula [MnX2L2]. The structures were ascertained by means of single-crystal X-ray diffraction. The three complexes show appreciable luminescence in the visible range upon excitation with UV
咔唑基取代的磷酰胺N , N , N ', N'-四甲基-P-咔唑-9-基膦酸二酰胺(L)与MnX 2卤化物(X = Cl,Br,I)成功配位,得到具有一般性的四面体配合物公式[MnX 2 L 2 ]。通过单晶X射线衍射确定结构。这三种配合物在紫外辐射激发下在可见光范围内显示出明显的发光,这归因于 Mn(II) 4 T 1 ( 4 G)→ 6 A 1 ( 6S) 跃迁叠加到配位配体的发射上。氯络合物的不同贡献特别明显,相对强度取决于激发波长。三种化合物的发光衰减曲线突出了两种发光水平之间的相关性。