Synthesis, characterization, and fluorescence properties of lanthanide complexes with the copolymers of 2‐butenedioic acid (z)‐mono‐ethyl ester and styrene

Abstract

In this study, the luminescent macromolecular lanthanide complexes with the copolymers of styrene (St) and 2-butenedioic acid (z)-mono-ethyl ester (BAME) have been synthesized, and an extensive characterization has been carried out by means of elemental analysis, FTIR, thermal analysis, and fluorescence determination. The results showed that the carboxylic groups on the chain of the polymers acted as bidentate ligands coordinated to lanthanide ions; and the coordination degree of -COO À / Ln 3þ in the macromolecular complexes was closely dependent on both the pH value of the solution and the molar ratio of St to BAME in the polymeric ligands.Thermal analysis manifested that the macromolecular complexes Ln-PSt/BAME (Ln ¼ Y, Sm, Dy, Eu, and Tb) were highly crosslinked and had high thermal stability and solvent resistance. The fluorescence determination indicated that Ln-PSt/BAME complexes could emit characteristic fluorescence with comparatively high brightness and good monochromaticity, and the fluorescence intensity increased with an increasing of lanthanide content.

Novel organic–inorganic hybrid soft xerogels with lanthanide complexes through an ionic liquid linkage

“…2(b) for [Ln(L) 4 ] À IM + -Ti1 (Eu, Tb, Sm), we can see immediately that there are similar characteristic absorption bands at 1572 cm À1 and 1441 cm À1 , which should be ascribed to the antisymmetric and symmetric stretching vibrations of the carboxylate. 18 Likewise, the absorption bands appearing at 1166 cm À1 are ascribed to the u C-O of the COOH group. The characteristic peak of u CQO of the COOH group (centered at about 1720 cm À1 ) disappears and the absorption bands arising at 1088 cm À1 and 802 cm À1 can be affected by the delocalization caused from u C-O and u Ti-O .…”

“…The preparation of the anionic lanthanide(III) tetrakis(bdiketonate) complexes denoted as Ln(L) 4 (Ln = Eu, Tb, Sm; L = TTA and TAA). Taking [Eu(TTA) 4 ] À as an example, lanthanide complexes were synthesized according to a modified literature procedure: 18 TTA and NaOH (1 : 1 molar ratio) were dissolved in a certain amount of absolute ethanol. The reaction temperature was maintained at 60 1C for about 5 h. Then an appropriate amount of EuCl 3 Á6H 2 O ethanol solution was added into the above mixed solution by stirring at 60 1C for 2 h (the molar ratio of TTA : Eu 3+ = 4 : 1).…”

Preparation of stable luminescent poly(methyl methacrylate)–europium complex nanospheres and application in the detection of hydrogen peroxide with the biocatalytic growth of gold nanoparticles

“…7–9. To overcome these disadvantages, some researchers have incorporated these complexes into various host matrices, and the incorporated complexes have shown improved photoluminescence properties and thermal stability 5, 10–14. However, for use in their senior applications in luminescence sensing, labeling, and bioimaging, the complexes need be fabricated into nanoparticles with stable luminescence, so it is necessary to find a simple method for preparing lanthanide‐complex‐based nanoparticles.…”