Fluorescence Properties of Polyacrylic Acid Derivative - Eu3+ Ion - Low Molecular Ligand Complexes

Abstract

The polyacrylic acid derivative, the copolymer (PABAM) of acrylic acid (AA) and p‐benzoic acid acrylamide (BAM) were prepared by polymeric reaction. The coordinate structure of the polymer–Eu3+ complexes was characterized by X‐ray photoelectron spectroscopy. The fluorescence intensity of the PABAM–Eu3+ complex was enhanced because of introduction of a BAM unit in the polyacrylic acid and reached a maximum when the mole ratio of AA to BAM was about 1 : 1. The ternary complexes of Eu3+–polymer–1,10‐phenanthroline (PRL), or 2,2‐bipyridine (BPD) were synthesized. The polymers used were PABAM and polyacrylic acid (PAA). The fluorescence intensity of the polymer–Eu3+ complexes was increased by 5∼21 times owing to the introduction of PRL and BPD.

Preparation and characterization of poly(styrene)/metal composites via reversible addition-fragmentation chain transfer (RAFT) polymerization

“…In the case of the polymer/metal composites, they showed a broadband ranging absorption only, and the excitation wavelength was about 389 nm. The reason for this is that the details of the rare earth metal excitation and emission spectra are particularly sensitive to structural details of the coordination environment [53][54][55][56][57][58]. These results also indicated that the structures of the Eu and Sm complexes were changed and that they bonded with dithiocarbamate units.…”

Synthesis and photoluminescence of the Eu3+ composite with dibenzoylmethane and oligoacrylic acid

“…Although considerable efforts have been expended on diverse studies of Eu 3+ –polyelectrolyte composites because of their promising application for plastic fluorescence materials,1–3 the corresponding ternary composite containing a second ligand besides polyanions has not yet been fully investigated and had been mainly observed in cases where the second ligand was dispersed in the polymer matrix. In those attempts—(1) research on the effect of low molecular weight ligands on the fluorescence properties of Eu 3+ –polyelectrolytes4, 5 and 2 study of Eu 3+ ‐linear and ‐branched polymers containing β ‐diketone moieties in the chain6— the weak fluorescence was attributed to a structural factor. It is hoped that the introduction of the second ligand into the coordination sphere of Eu 3+ by releasing precoordinated water molecules may be an efficient way to enhance fluorescence.…”