Luminescent Langmuir–Blodgett films based on Tiron–terbium

The luminescent ultrathin Langmuir–Blodgett (LB) films containing Tb2(C6H3S2O8)2 (Tiron–Tb) were successfully obtained. The modifications of compression isotherms of dimethyldioctadecylammonium bromide (DODA) have been observed when the Tiron–Tb complex was dissolved in the subphase. The effect of Tiron–Tb in the subphase on Langmuir films of DODA has been studied. Low-angle X-ray diffraction result indicates that the LB films have a good periodic layered structure. The UV and IR spectra results show the Tiron–Tb complex is incorporated into LB films layer-by-layer and the LB films are homogeneously deposited. The LB films containing Tiron–Tb can emit strong green luminescence, and the luminescence signal can be detected from a single layer. The luminescence properties of LB films have been discussed compared with those of the solutions.