Anion responsive dibenzoyl-L-cystine and luminescent lanthanide soft material

A mild sol-gel technique was used to incorporate terbium dibenzoyl-L-cystine complex into silica and green luminescent hybrid material was fabricated. (1)H NMR and fluorescence spectroscopy revealed the hybrids can recognize F(-) anions through hydrogen bonding formation and had no sense in binding other halide or HSO(4)(-). Furthermore, a luminescent hydrogel was successfully designed by immobilizing a terbium activated phosphor (Gd(0.1)Ce(0.9)PO(4):Tb) into molecular hydrogelator (dibenzoyl-L-cystine). The Tb(III) emission in hydrogel media gave a distinguished enhancement based on temperature increase and the function conforms to exponential equation y = 1160.6 exp(0.03x). The stability of the green luminescent gel was rather excellent and the reversibility of the gel can be recycled at least five times.