1414446-25-5Relevant academic research and scientific papers
Anions make the difference: Conversion from zero- to one-dimensional structures and luminescent properties of lanthanide-based complexes
Yan, Xuhuan,Yan, Zhenzhong,Zhang, Ye,Liu, Weisheng,Tang, Yu,Tan, Minyu
, p. 4989 - 4996 (2012)
Reaction of a newly designed amide type ligand, benzyl-N,N-bis[(2′- benzylaminofomyl)phenoxyl)ethyl]-amine (L) with lanthanide nitrates and picrates has produced two isostructural series of lanthanide coordination compounds, [Ln2L2(NO3)6(DMF)2] n [series 1, monoclinic P21/c, Ln = Pr (1), Sm (2), Eu (3), Tb (4), and Dy (5)] and [LnL(pic)3(CH3CH 2OH)]n [series 2, triclinic P1, Ln = Nd (6), Eu (7), Tb (8), and Er (9)]. Series 1 have zero-dimensional (0D) dinuclear rectangular macrocycle architectures, while series 2 exhibit one-dimensional (1D) chain patterns. Meanwhile, the two series of structures are further connected through weak intermolecular hydrogen bonds to yield three-dimensional (3D) supramolecular structures. The variations from zero- to one-dimensional coordination structures are attributed to different steric confinement of the nitrate and picrate anions. In addition, we have studied the luminescent properties of the nitrate and picrate complexes, and found that the picrate complexes give very weak luminescence due to coordinated ethanol molecules existing in complexes, which decrease the luminescence. So, herein the luminescent properties of only the Sm (2), Eu (3), Tb (4), and Dy (5) nitrate complexes are investigated in detail.
Synthesis and crystal structure of a dinuclear praseodymium nitrate complex
Yan,Hou,Tang,Liang
, p. 803 - 807 (2013)
Dinuclear supramolecular complex of praseodymium nitrate with an unsymmetrical tipodal ligand benzyl-N,N-bis[(2′-benzylaminoformyl) phenoxyl)ethyl]-amine (L), have been prepared. The X-ray single-crystal diffraction analysis indicates that this complex was crystallized in the monoclinic system, space group P21/c with parameters a = 16.736(3), b = 14.042(3), c = 19.782(4) A, β = 101.823, V = 4550.50(16) A3, Z = 4. The structure was refined to the final R 1 = 0.0473. The complex units are linked by the intermolecular hydrogen bonds to form a three-dimensional (3D) netlike supramolecuar structure.
