A series of homochiral lanthanide coordination polymers, [Ln(IDA)(HIDA)]n [Ln = Eu (1), Gd (2), Tb (3), Dy (4); IDA = iminodiacetate; HIDA = N-protonated iminodiacetate] have been hydrothermally synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction. Compounds 1–4 are isostructural three-dimensional (3D) coordination polymers. Spontaneous resolution occurs during crystal growth in the absence of a chiral source, as the enantiomers are obtained and confirmed by single-crystal X-ray diffraction and solid-state circular dichroism (CD) measurements. Furthermore, photoluminescence measurements indicate europium compound (1) and terbium compound (3) are red and green emitters, respectively, in the solid state at room temperature.
通过
水热法合成了一系列同手性
镧系元素配位聚合物 [Ln(
IDA)(H
IDA)]n [Ln = Eu (1)、Gd (2)、Tb (3)、Dy (4);
IDA =
亚氨基二乙酸酯;H
IDA = N-质子化
亚氨基二乙酸酯],并通过元素分析、红外光谱、热重分析和单晶 X 射线衍射对其进行了表征。化合物 1-4 是等结构三维配位聚合物。在晶体生长过程中,在没有手性源的情况下,对映体会发生自发分辨,并通过单晶 X 射线衍射和固态圆二色性(CD)测量得到证实。此外,光致发光测量结果表明,
铕化合物 (1) 和
铽化合物 (3) 在室温固态下分别为红色和绿色发光体。