[Pr(N-(2-hydroxyethyl)-4-octaadecyloxysalicylaldimine)3(NO3)3] | 1301768-99-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: [Pr(N-(2-hydroxyethyl)-4-octaadecyloxysalicylaldimine)3(NO3)3]
• CAS: 1301768-99-9
• 化学式: C₈₁H₁₄₁N₆O₁₈Pr
• 分子量: 1627.95
• InChiKey: AEZOWQJIDKAVQV-LGHLSKDSSA-N

反应信息

• 作为产物：
  描述：

  praseodymium(III) nitrate hexahydrate 、 N-(2-hydroxyethyl)-4-octadecyloxysalicylaldimine 以 乙醇 、 乙腈 为溶剂， 以78%的产率得到[Pr(N-(2-hydroxyethyl)-4-octaadecyloxysalicylaldimine)3(NO3)3]
  参考文献：
  名称：

  Novel photoluminescent lanthanidomesogens forming bilayer smectic phase derived from blue light emitting liquid crystalline, one ring O-donor Schiff-base ligands

  摘要：

  A series of new mononuclear lanthanide(III)-salicylaldimine complexes of the type [Ln(LH)(3)(NO3)(3)] (Ln = La, Pr, Sm and Gd: LH = N-(2-hydroxyethyl)-4n-alkoxysalicylaldimine, n = 14, 18) have been synthesized and characterized by FT-IR, H-1 NMR, C-13 NMR, UV-Vis, FAB-mass and magnetic susceptibility measurements. The ligand (LH) coordinate to lanthanide ions in zwitterionic form via the phenolic-oxygen with the proton shifted to the imine-nitrogen. The nitrato groups occurring in chelated bidentate fashion complete a nine-coordinate geometry. Polarized optical microscopy (POM) and differential scanning calorimetry (DSC) show that the ligands are monotropic and their complexes exhibit enantiotropic highly viscous smectic A (SmA) mesophase in the temperature range 60-185 degrees C. A bilayer self organized assembly of the molecules in the mesophase are proposed on the basis of the small angle XRD study. The ligands are blue light emitters with a broad emission maxima at similar to 447 nm while the lanthanide complexes show intense emission in the visible range (similar to 465-679 nm) at 350 nm excitation. The samarium(III) complex, I Sm(LH)3(NO3)31 is distinct from the rest in emitting bright orange light (similar to 660 nm, Phi = 48%). The S-o-S-1 excitation band being stronger than the direct f-f excitation in the samarium complex clearly suggests that the Schiff-base ligands efficiently sensitize the luminescence of Sm3+. DFT calculations have been performed using DMol3 program at BLYP/DNP level to obtain the stable electronic structure of the ligand and complex. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.poly.2011.01.015