3,4,5-Trisbenzyloxy benzoic acid as a new photo-sensitizer for Tb3+ion

A novel and highly conjugated aromatic carboxylic acid, 3,4,5-trisbenzyloxy benzoic acid (TBBA) and the corresponding Tb3+ complex has been synthesized and characterized by various spectroscopic techniques. The room temperature photoluminescence spectrum of Tb3+ complex is composed of typical green emissions, assigned to transitions between the first excited state 5D4 to the 7FJ (J = 6, 5, 4, 3), with an excited state lifetime of 0.397 ms and a quantum yield of 1%.