Synthesis and photoluminescence of Eu-doped Zn/Al layered double hydroxides

Chen, Yufeng; Zhou, Songhua; Li, Fan; Chen, Yiwang

doi:10.1007/s10853-010-4725-8

Cited by 38 publications

(16 citation statements)

References 36 publications

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“…This method recommends its application for fluorescence bioprobes. Accordingly, we had synthesized Mg–Al–Eu and Zn–Al–Eu ternary layered hydroxides, which have characteristic red emissions resulting from the 5 D 0 – 7 F j ( j = 1, 2, 3, 4) transitions of Eu(III) . Furthermore, in the present study we found that the strong red emissions attributed to the Mg–Al–Eu ternary layered hydroxide can be quenched by Trp.…”

Section: Introductionsupporting

confidence: 57%

The fluorescence of Mg–Al–Eu ternary layered hydroxides response to tryptophan

Chen

Zhou

et al. 2011

Luminescence

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We have studied the fluorescence of Mg-Al-Eu ternary layered hydroxides (TLH) quenched by tryptophan (Trp). IR spectroscopy was used to evaluate the change of Trp structure which was caused by TLH. XRD and TG-DTA results further suggested a structural change of Trp after being reacted with TLH. XPS characterization confirmed a strong chemical reaction between Trp and TLH. These studies may present more direct evidence to explain the interrelation between the structural change of Trp and the fluorescent quenching of TLH.

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Section: Introductionsupporting

confidence: 57%

The fluorescence of Mg–Al–Eu ternary layered hydroxides response to tryptophan

Chen

Zhou

et al. 2011

Luminescence

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“…Depending on the λ exc used, the emission spectrum shows red emission of the Eu 3+ ion and cinnamate anion. Moreover, emission bands observed are broad and low-intensity [25,26] due to the high amount of water and OH groups present in the LDH, which provide nonradiative deactivation by multiphonon process.…”

Section: Optical Propertiesmentioning

confidence: 99%

Eu(III) doped LDH intercalated with cinnamate anion as multifunctional sunscreens

Saito

Romero

Cebim

et al. 2018

Journal of Luminescence

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Eu(III) doped Zn 2 Al-LDH intercalated with cinnamate anions with different C 9 H 7 O 2-/M 3+ molar ratios were synthesized by different anion-exchange methods. The XRD patterns indicate the formation of hydrotalcite-like compounds. UV-VIS absorption spectra show that the hybrid materials obtained have UV shielding capacity. PLS measurements show low-intensity red light emission of the characteristic europium and cinnamate ions that is recommended to induce collagen production.

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“…The band around 1384 cm −1 corresponding to C–O stretching of the primary alcoholic group and v 3 (asymmetric stretching mode) of the carbonate anions showed the formation of C=OH–O–M in the hybrid ZnAl/CS [32]. An intense absorption band was located between 1000 and 500 cm −1 , the peaks in this range could be ascribed tothe vibrational modes of different groups corresponding to N–H, M–O–M, and M–O (M = Zn or Al) [33,34].…”

Section: Resultsmentioning

confidence: 99%

Optimization of ZnAl/Chitosan Supra-Nano Hybrid Preparation as Efficient Antibacterial Material

Gohi

Zeng

et al. 2019

IJMS

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The menace of antimicrobial resistance continues to increase and hence the need to discover new antibiotics, especially alternative and effective sources such as hybrid organic-inorganic, organic-organic materials, and other combinations. In this study, an antimicrobial hybrid supra-nano material was prepared by the bi-titration synthesis method of chitosan (CS) and ZnAl layered double hydroxide. Fourier-transform infrared spectrometer (FTIR), thermogravimetric and differential thermal gravimetric (TGA/DTG), ultraviolet-visible (UV-Vis), X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses indicated that the ZnAl/CS hybrid exhibited low crystallinity with high thermal stability. The results of ZnAl/CS characterization showed the characteristic properties of the individual components ZnAl and CS, indicating a successful preparation of the ZnAl/CS hybrid. The antibacterial tests revealed that the ZnAl/CS hybrid possessed an enhanced antimicrobial effect against both Escherichia coli (E. coli, MTCC 739) and Penicilliumcyclopium (P. cyclopium, AS 3.4513). Under the central composite design (CCD) of the response surface methodology (RSM) tool, the parameters of the hybrid synthesis reaction were optimized and the result obtained was as follows: reaction pH was 11.3, reagent Zn/Al ratio was 3.27, and chitosan concentration was 1.07 g/L. After optimization, it was found that the antibacterial activity of ZnAl/CS was strengthened against E. coli as evidenced by a widening of the inhibition zone of about 41.6%. The antibacterial activity of ZnAl/CS was mainly due to the reactivation of the antibacterial activity of CS associated with the release of Zn2+ and Al3+ metal ions in addition to ZnO, Al2O3, and ZnAl2O4 compounds resulting from the method of preparation.

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Synthesis and photoluminescence of Eu-doped Zn/Al layered double hydroxides

Cited by 38 publications

References 36 publications

The fluorescence of Mg–Al–Eu ternary layered hydroxides response to tryptophan

The fluorescence of Mg–Al–Eu ternary layered hydroxides response to tryptophan

Eu(III) doped LDH intercalated with cinnamate anion as multifunctional sunscreens

Optimization of ZnAl/Chitosan Supra-Nano Hybrid Preparation as Efficient Antibacterial Material

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