Synthesis, Structure and Fluorescent Properties of Europium Complexes with Cinnamic Acid and Its Derivates

Europium complexes with cinnamic acid (HL) and its para-substitued derivates R-L (R=CH3, Cl, NO2, OCH3, OH) have been synthesized, and their crystal structures have been determined. The results of single-crystal X-Ray diffraction have shown that {[Eu-2(CH3-L)(6)(DMF) (H2O)]center dot 2DMF center dot H2O}(n) (1) and {[Eu-2(Cl-L)(6)(DMF) (H2O)]center dot 2DMF center dot H(2)Ob, (2) are 1D chain coordination polymers while {[Eu-2(NO2-L)(6)(DMF)(H2O)]center dot 2DMF-H2O}(2) (3) is binuclear structured. The complexes have been characterized by FT-IR. UV-Vis and photoluminescence (PL) spectroscopy. The influence of substituted groups' electron-withdrawing effect has been discussed. The effect of coordinated solvent molecular on complexes' luminescent properties has been investigated. CCDC:856461, 1; 856460, 2; 856462, 3.