This paper reports a novel rare interesting crystal structures of gadolinium 2-fluorobenzoato (2-FBA) complex containing 1,10-phenanthroline (phen). The two non-equivalent binuclear molecules, [Gd(2-FBA)3(phen) (CH3CH2OH)]2 and [Gd(2-FBA)3(phen)]2, exist in the asymmetric unit of the crystal. The molecular structure of [Gd (2-FBA)3(phen)(CH3CH2OH)]2 shows that the Gd3+ ion is eight-coordinated by five O atoms from five 2-FBA groups and one O atom from one ethanol molecule and two N atoms from phen molecule. 2-FBA groups adopt monoden- tate and bridging two coordination modes. The molecular structure of [Gd(2-FBA)3(phen)]2 shows that the Gd3+ ion is coordinated by nine atoms, seven O atoms from five 2-FBA groups and two N atoms from phen molecule. The 2-FBA groups link Gd3+ ion in chelating, bridgingand chelating-bridgingthree coordination modes. CCDC: 273106.
Complex [Tb(2-FC6H4COO)3·C10H8N2]2 was synthesized from TbCl3·nH2O,2-fluorobenzoic acid,and 2,2′-bipyridine(C10H8N2).The crystals are monoclinic with space group P21/n,and the crystal parameters are:a=1.219 1（4） nm,b=1.777 4（6） nm,c=1.371 5（4） nm,β=111.400（5）,（M=）732.41,V=2.767（15） nm3,Z=4,Dcalc=1.758 g/cm3,T=293（2） K.The final R=0.030 2,（wR=）0.054 7.The two Tb3+ ions are linked together by four 2-fluorobenzoate groups in a bridging mode to form a dimeric unit.Each Tb3+ ion is also chelated by one 2-fluorobenzoate group and one 2,2′-bipy ligand,making a coordination number of eight.There are four emission peaks in the luminescence spectrum at 490,545,584,and 618 nm,corresponding to the transitions of the Tb3+ ion:5D4→7F6,5D4→7F5,5D4→7F4,and(5D4→)7F3,respectively.
