9TEOTONIO E E S,FELINTO M C F C,BRITO H F.Synthesis,crystalline structure and photoluminescence investigations of the new trivalent rare earth complexes[J].Inorg Chim Acta,2004,357:451 -460.
10SONG Y S,YAN B,CHEN Z X.Different crystal structure and photophysical properties of lanthanide complexes with 5-bromonicotinic acid[J].Journal of Solid State Chemistry,2004,177:3805-3814.