Crystal structure and fluorescence spectrum of the complex [Eu(III)(TTA) 3 (phen)]

The title complex Eu(III)(TTA) 3 (phen) (where TTA = thenoyltrifluoroacetone monoanion; phen = 1,10‐phenanthroline) has been synthesized in mixed solvents of acetone and ethanol (1:1 volume ratio) and its crystal structure has been determined by X‐ray diffraction. The complex crystals are triclinic, space group P 1 (# 2) with cell dimensions of a = 1.32.41 (2) nm, b = 1.5278(4) nm, c = 0.9755(3) nm, α = 92.49 (2)°, β = 102.57(2)°, γ = 91.62(2)°, V = 1.9268(8) nm 3 , Z = 2, μ (Mo Ka )= 18.77 cm −1 , D x = 1.720 g/cm 3 . The coordination geometry of Eu atom is a distorted square antiprism, and the encapsulated structure that can meet the structural requirement of the typical europium luminescent sensor. The fluorescence spectrum suggests that the complex is a strong photoluminescent material.