Rare earth complexes with 3,4-dimethylbenzoic acid and 2,2:6′,2″-terpyridine: Synthesis, crystal structures, luminescence and thermodynamic properties

Zhu, Min‐Min; Zhang, Zhen; Ren, Nanqi; Wang, Shuping; Zhang, Jianjun

doi:10.1016/j.ica.2018.09.061

Cited by 11 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Luminescent rare earth complexes have become the research hotspot of new rare earth functional materials, because of their unique luminescence properties, such as extremely sharp emission bands [1,2], long excited-state lifetimes [3][4][5], and potential high internal quantum efficiency [6][7][8]. When rare earth metals are complexed with appropriate organic ligands, their improved solubility and dispersion would make their luminescence properties more prominent than they are in states of inorganic salts [9,10]. Furthermore, rare earth metals complexed with a polymeric matrix, namely, the so-called polymer-rare earth complexes, possess the combined properties of luminescent rare earth metals and the polymer matrix, making them have good solubility in solution, high mechanical strength in bulk, excellent processability, and outstanding luminescent emission properties.…”

Section: Introductionmentioning

confidence: 99%

Eu3+- and Tb3+-Based Coordination Complexes of Poly(N-Isopropyl,N-methylacrylamide-stat-N,N-dimethylacrylamide) Copolymer: Synthesis, Characterization and Property

Cui

et al. 2022

Polymers

View full text Add to dashboard Cite

This contribution reports the syntheses, structural analyses and properties of europium (Eu3+)- and terbium (Tb3+)-based coordination complexes of poly(N-isopropyl,N-methylacrylamide-stat-N,N-dimethylacrylamide) (poly(iPMAm-stat-DMAm)) copolymer, named as poly-Eu(III) and poly-Tb(III), respectively. In greater detail, poly(iPMAm85-stat-DMAm15) is first prepared by random copolymerization of N-isopropyl,N-methylacrylamide (iPMAm) and N,N-dimethylacrylamide (DMAm) via group transfer polymerization (GTP). Next, poly(iPMAm85-stat-DMAm15) is used as the polymer matrix for chelating with Eu3+ and Tb3+ cations at its side amide groups, to produce poly-Eu(III) and poly-Tb(III). Their structural characterizations by FT-IR spectroscopy and XPS confirm the formation of polymeric complexes. The study on their fluorescence emission characteristics and luminescence lifetime demonstrates that Poly-Eu(III) shows four strong emission peaks at 578, 593, 622, and 651 nm, which are responsible for the electron transitions from the excited 5D0 state to the multiplet 7FJ (J = 0, 1, 2, 3) states, respectively, and poly-Tb(III) also displays four emission peaks at 489, 545, 588, and 654 nm, mainly due to the electron transitions of 5D4 → 7Fi (i = 6, 5, 4, 3). The luminescence lifetimes of poly-Eu(III) (τpoly-Eu(III)) and poly-Tb(III) (τpoly-Tb(III)) are determined to be 4.57 and 7.50 ms, respectively. In addition, in aqueous solutions, poly-Eu(III) and poly-Tb(III) are found to exhibit thermoresponsivity, with their cloud temperatures (Tcs) locating around 36.4 and 36.8 °C, respectively. Finally, the cytotoxicity study on the human colon carcinoma cells LoVo and DLD1 suggests that the luminescent Eu3+ and Tb3+ in the chelated state with poly(iPMAm-stat-DMAm) show much better biocompatibility and lower toxicity than their inorganic salts.

show abstract

Section: Introductionmentioning

confidence: 99%

Eu3+- and Tb3+-Based Coordination Complexes of Poly(N-Isopropyl,N-methylacrylamide-stat-N,N-dimethylacrylamide) Copolymer: Synthesis, Characterization and Property

Cui

et al. 2022

Polymers

View full text Add to dashboard Cite

show abstract

“…These results prove that the coordination mode of p‐methylbenzoic acid and rare earth ions was changed from the original chelating bidentate coordination to monodentate coordination after the PATC adsorbed acid gas. As the coordination number did not reach 8, the fluorescence intensity of the PATC decreased with the increase of the acid gas adsorbed . The original chelating bidentate coordination of PATC can be recovered when the surrounding environment is weakly alkaline (pH = 8.5 to 9) due to the introduction of alkaline gas (such as NH 3 ).…”

Section: Resultsmentioning

confidence: 99%

Structure and Properties of PET Nano‐Porous Luminescence Fibers for Fluorescence‐Indicating to Acid Gases

Shu

Xia

et al. 2019

Macro Materials & Eng

View full text Add to dashboard Cite

This work describes the fluorescence‐indicating function to trace acid gases of polyethylene terephthalate (PET) nano‐porous luminescence fibers (PNPLFs) through the analysis of correlation between the concentration of acid gas and fluorescence intensity of organic rare earth complexes dispersed uniformly in the PET nano‐porous structured fibers. The porous structure and large specific surface area of the PET nano‐fibers prepared through electrospinning technology offer the strong adhesive force and good absorption efficiency of PET nano‐porous fibers to acid gases. The fast response ability of benzoic acid organic rare earth complexes to pH value gives the PET nano‐porous luminescence fibers fluorescence‐indicating function to acid gas. Under dry state and in situ conditions, the fluorescence‐indicating to acid gases of PET nano‐porous luminescence fibers can be completed in 10 s. The precise value is 1 ppm. At the same time, repeated cycling experiments show that the PET nano‐porous luminescence fibers have good recycling property, and the recycling life can increase 40‐fold. Coupled with the good mechanical performances that the breaking strength achieves 121.6 cN, the PET nano‐porous luminescence fibers have better potential in the fluorescence‐indicating to acid gases.

show abstract

“…Further analysis of CIE chromaticity coordinates indicates that complexes 1 - 2 and 4 is ideal candidate for orange-red, red and green component, respectively. These complexes may be very promising in the field of luminescent materials ( Zhu et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Five Dinuclear Lanthanide Complexes Based on 2,4-dimethylbenzoic Acid and 5,5′-dimethy-2,2′-bipyridine: Crystal Structures, Thermal Behaviour and Luminescent Property

et al. 2021

Self Cite

View full text Add to dashboard Cite

A series of new complexes, [Ln (2,4-DMBA)3(5,5′-DM-2,2′-bipy)]2 (Ln = Sm(1), Eu (2)), [Pr (2,4-DMBA)3 (5,5′-DM-2,2′-bipy)]2·0.5(C2H5OH) (3), [Ln (2,4-DMBA)3 (5,5′-DM-2,2′-bipy)]2·0.5(2,4-DMBAH)·0.25(5,5′-DM-2,2′-bipy) (Ln = Tb (4), Dy (5)) (2,4-DMBA = 2,4-dimethylbenzoate, 5,5′-DM-2,2′-bipy = 5,5′-dimethy-2,2′-bipyridine) were synthesized via hydrothermal reaction conditions. The complexes were characterized through elemental analysis, Infrared spectra (IR), Raman (R) spectra, UV-Vis spectra, single X-ray diffraction. Single crystal data show that complexes 1–5 are binuclear complexes, but they can be divided into three different crystal structures. The thermal decomposition mechanism of complexes 1–5 were investigated by the technology of simultaneous TG/DSC-FTIR. What’s more, the luminescent properties of complexes 1–2 and 4 were discussed, and the luminescence lifetime (τ) of complexes 2 and 4 were calculated.

show abstract

Rare earth complexes with 3,4-dimethylbenzoic acid and 2,2:6′,2″-terpyridine: Synthesis, crystal structures, luminescence and thermodynamic properties

Cited by 11 publications

References 21 publications

Eu3+- and Tb3+-Based Coordination Complexes of Poly(N-Isopropyl,N-methylacrylamide-stat-N,N-dimethylacrylamide) Copolymer: Synthesis, Characterization and Property

Eu3+- and Tb3+-Based Coordination Complexes of Poly(N-Isopropyl,N-methylacrylamide-stat-N,N-dimethylacrylamide) Copolymer: Synthesis, Characterization and Property

Structure and Properties of PET Nano‐Porous Luminescence Fibers for Fluorescence‐Indicating to Acid Gases

Five Dinuclear Lanthanide Complexes Based on 2,4-dimethylbenzoic Acid and 5,5′-dimethy-2,2′-bipyridine: Crystal Structures, Thermal Behaviour and Luminescent Property

Contact Info

Product

Resources

About