Luminescent lanthanide complexes with 4-acetamidobenzoate: Synthesis, supramolecular assembly via hydrogen bonds, crystal structures and photoluminescence

Authors：Yin Xia; Fan Jun^*; Wang Zhi Hong; Zheng Sheng Run; Tan Jing Bo; Zhang Wei Guang

Source：Journal of Solid State Chemistry, 2011, 184(7): 1850-1857.

DOI：10.1016/j.jssc.2011.05.018

• Luminescent lanthanide complexes
• 4-Acetamidobenzoate
• Supramolecular assembly
• Photoluminescence

Four new luminescent complexes, namely, [Eu(aba)(2)(NO(3))(C(2)H(5)OH)(2)] (1), [Eu(aba)(3)(H(2)O)(2)] center dot 0.5 (4, 4'-bpy) center dot 2H(2)O (2). [Eu(2)(aba)(4)(2, 2'-bpy)(2)(NO(3))(2)] center dot 4H(2)O (3) and [Tb(2)(aba)(4)(phen)(2)(NO(3))(2)] center dot 2C(2)H(5)OH (4) were obtained by treating Ln(NO(3))(3) center dot 6H(2)O and 4-acetamidobenzoic acid (Haba) with different coligands (4, 4'-bpy=4, 4'-bipyridine, 2, 2'-bpy=2, 2'-bipyridine, and phen=1, 10-phenanthroline). They exhibit 1D chains (1-2) and dimeric structures (3-4), respectively. This structural variation is mainly attributed to the change of coligands and various coordination modes of aba molecules. Moreover, the coordination units are further connected via hydrogen bonds to form 2D even 3D supramolecular networks. These complexes show characteristic emissions in the visible region at room temperature. In addition, thermal behaviors of four complexes have been investigated under air atmosphere. The relationship between the structures and physical properties has been discussed.

• Institution
  华南师范大学