📜2-氨基-6-溴吡啶置于硫酸,双氧水体系中,用8.55 G的收率获得2-溴-6-硝基吡啶
参考文献:Unusual Nitro-Coordination Of Europium(III) And Terbium(III) With Pyridinyl Ligands
标题:Unusual Nitro-Coordination Of Europium(III) And Terbium(III) With Pyridinyl Ligands
摘要:一种基于吡啶,双吡啶和三吡啶并含有硝基官能团的新配体家族已被合成,并研究了其对镧系离子的配位和敏化能力.通过x射线单晶衍射表征了三个新配合物,三个配合物均显示出硝基官能团与镧系离子之间的不寻常配位.5Ctb是一种与tb(No3)3配位的三吡啶-硝基衍生物,结晶于正交晶系pbca,晶胞参数为a = 15.125(3),B = 13.776(3),C = 18.716(4) å,V = 3899.8(13) å³,与其eu(III)类似物(5Ceu)具有相同的结构,晶胞参数为a = 15.1341(4),B = 13.7070(4),C = 18.8277(5) å.6Eu是一种与eu(Cf3So3)3配位的三叉氨基硝基取代吡啶,结晶于三斜晶系p,晶胞参数为a = 11.067(2),B = 11.633(2),C = 12.772(3) å,α = 110.94(3),β = 97.49(3),γ = 91.42(3)°,V = 1518.1(5) å³.最后,配体5A是双吡啶-硝基衍生物,结晶于正交晶系p21/n,晶胞参数为a = 3.7128(3),B = 11.7806(8),C = 19.9856(14) å,β = 92.925(2)°,V = 873.01(11) å³.所有四种配体均显示出对eu(III)和tb(III)的发光敏化.
Doi:10.1039/c2Dt31308A