Investigation of the Chemistry for the Host Sol‐Gel Glass via the Energy Transfer Fluorescence of Encapsulated Organic‐Tb(III) Complexes

Abstract

AbstractFluorescence of organo‐terbium complexes have been investigated as a function of the matrix composition using two sol‐gel derived hosts: (a) matrix 1, an alkoxysilane Si (OR)4, where all the coordinated OR groups associated with silicon hydrolyze in water and (b) matrix 2 with an organoalkoxysilane, R’‐ Si (OR)3 which consists of organic R’ groups that don't hydrolyze. The synthesized organo‐Tb(III) complexes, namely: Tb(III) dithiocarbamate‐Tb(L1)3B [L1=(R)2NCS2B, R=C2H5 and B=1,10‐phenanthroline] and Tb(III) complex with the polytonic ligand L2=N’, N’2‐bis[(1E)‐1‐2‐(pyridyl)ethylidine]ethanedihydrazide Tb2‐L2‐(CH3COO)2; L2=C16H16 N6O2) were in situ encapsulated in the sol‐gel glass hosts matrices, 1 and 2. Tb luminescence was shown to depend largely on (i) the ligand surrounding Tb ions, and (ii) chemistry or nature of the sol‐gel host matrix.