Enhanced luminescence of Eu3+ by Gd3+ in ternary chelate doped in gel glasses via in situ technique

Rare-earth ternary chelates EuXGd1−X(TFA)3(TPPO)2 (image, 0.3, 0.4,…,1.0) were synthesized in gel glasses via in situ technique. Corresponding pure chelates were also synthesized for a comparative investigation and were characterized with Fourier transform infrared (FTIR) absorption spectra and elemental analysis. Photoluminescence (PL) properties of the in situ chelates in gel glasses and the pure chelates have been studied comparatively. It is found that the enhanced luminescence of Eu3+ ions by Gd3+ ions (energy transfer from Gd3+ ions to Eu3+ ions) occurs in both pure and in situ ternary chelates.