Fig. 1: Photophysical characterization of TPEMA monomer.

A UV absorption and B photoluminescence emission behavior of TPEMA in THF–H2O mixtures (10−6 M) with different volume fractions of water (fw = 0%, 25%, 35%, 50%, 75%, 95%). In the inset: A photographic image of the solutions under a TLC UV lamp (@ 366 nm) and B photographs of TPEMA monomer at the solid state as a powder (left) and in THF solution (right), both observed under daylight (top) and UV light (bottom). C Normalized PL spectra of TPEMA in THF diluted solution (10−6 M) and as a cast film, D emission decays (scatter plots): TPEMA in THF at 417 nm with bi-exponential fit (solid line) and TPEMA as cast film at 486 nm with three-exponential fit (solid line).