We report here the nonlinear absorption properties of different coordination compounds (M = Eu, Zn), based on the bifluorene system. Measurements were performed in chloroform between 450 and 650 nm for nanosecond time duration pulses. The nonlinear absorption, is attributed to a three-photon absorption process involving a first two-photon absorption, step followed by an excited state absorption process. The three-photon absorption. efficiency of these complexes was shown to be similar to that of the bifluorene for a same concentration in bifluorene, with furthermore an excellent thermal stability.