Sol-gel synthesis and characterization of hybrid inorganic-organic Tb(III)-terephthalate containing layered double hydroxides

Smalenskaite, A.; Salak, Andrei N.; Ferreira, M.G.S.; Skaudžius, Ramūnas; Kareiva, Aivaras

doi:10.1016/j.optmat.2018.04.048

Cited by 25 publications

(9 citation statements)

References 36 publications

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“…For the hybrid RE-organic LDH materials, intercalation of guest organic anions in the interlayer galleries influences the luminescence properties dramatically. For example, the enhanced green luminescence for Tb 3+ by terephthalate anions in Tb-doped LDH was observed [ 17 ]. It was determined the possible energy transfer from the excited state of the introduced anion to Tb 3+ active centres.…”

Section: Introductionmentioning

confidence: 99%

Undoped and Eu3+ Doped Magnesium-Aluminium Layered Double Hydroxides: Peculiarities of Intercalation of Organic Anions and Investigation of Luminescence Properties

et al. 2019

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The Mg3/Al and Mg3/Al0.99Eu0.01 layered double hydroxides (LDHs) were fabricated using a sol-gel chemistry approach and intercalated with different anions through ion exchange procedure. The influence of the origin of organic anion (oxalate, laurate, malonate, succinate, tartrate, benzoate, 1,3,5-benzentricarboxylate (BTC), 4-methylbenzoate (MB), 4-dimethylaminobenzoate (DMB) and 4-biphenylacetonate (BPhAc)) on the evolution of the chemical composition of the inorganic-organic LDHs system has been investigated. The obtained results indicated that the type and arrangement of organic guests between layers of the LDHs influence Eu3+ luminescence in the synthesized different hybrid inorganic–organic matrixes. For the characterization of synthesis products X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, fluorescence spectroscopy (FLS), and scanning electron microscopy (SEM), were used.

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Section: Introductionmentioning

confidence: 99%

Undoped and Eu3+ Doped Magnesium-Aluminium Layered Double Hydroxides: Peculiarities of Intercalation of Organic Anions and Investigation of Luminescence Properties

et al. 2019

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“…Moreover, series of LDHs and mixed-metal oxides with different lanthanide cations were also prepared [ 27 ]. Smalenskaite et al focused on the characterisation of LDHs doped with Tb 3+ [ 28 ], Nd 3+ [ 29 ] and Eu 3+ [ 30 ]. Chromium was also used as a substituent in different LDHs for various reasons.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structural and Luminescent Properties of Sol-Gel-Derived Cr‑Substituted Mg3Al1−xCrx Layered Double Hydroxides

Valeikiene

Grigoravičiūtė-Puronienė

Katelnikovas

et al. 2021

Molecules

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In the present work, Cr-substituted Mg3Al1−xCrx layered double hydroxides (LDHs) were synthesised through the phase conversion of sol-gel-derived mixed-metal oxides in an aqueous medium. The chromium substitution level in the range of 1 to 25 mol% was investigated. It was demonstrated that all synthesised specimens were single-phase LDHs. The results of elemental analysis confirmed that the suggested synthetic sol-gel chemistry approach is suitable for the preparation of LDHs with a highly controllable chemical composition. The surface microstructure of sol-gel-derived Mg3Al1−xCrx LDHs does not depend on the chromium substitution level. The formation of plate-like agglomerated particles, which consist of hexagonally shaped nanocrystallites varying in size from approximately 200 to 300 nm, was observed. Optical properties of the synthesised Mg3Al1−xCrx LDHs were investigated by means of photoluminescence. All Cr-containing powders exhibited characteristic emission in the red region of the visible spectrum. The strongest emission was observed for the sample doped with 5 mol% Cr3+ ions. However, the emission intensity of samples doped with 1–10 mol% Cr3+ ions was relatively similar. A further increase in the Cr3+ ion concentration to 25 mol% resulted in severe concentration quenching.

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“…The selectivity of divalent anions, such as SO 4 2− > CO 3 2− is comparatively higher over the monovalent anions. However, among all, precursors with NO 3 − species are most appropriate for ion‐exchange process due to their easy displacement from the interlayers . These 2D matrices possessing an overall positively charged surface not only facilitate the accommodation of negatively charged drug species in their interlayer gallery but also augment the cell internalization efficiency of such compounds through establishing the interactions with the biological membrane .…”

Section: Introductionmentioning

confidence: 99%

“…However, among all, precursors with NO 3 − species are most appropriate for ion-exchange process due to their easy displacement from the interlayers. 14,15 These 2D matrices possessing an overall positively charged surface not only facilitate the accommodation of negatively charged drug species in their interlayer gallery but also augment the cell internalization efficiency of such compounds through establishing the interactions with the biological membrane. 1,16 More often, the LDHs facilitate the encapsulation of anionic drugs that with carboxylic functional groups, which could be difficult to encapsulate Dox in their gallery space.…”

Section: Introductionmentioning

confidence: 99%

Engineered pH‐responsive hydrazone‐carboxylate complexes‐encapsulated 2D matrices for cathepsin‐mediated apoptosis in cancer

Liu

Kankala

Liao

et al. 2019

J Biomedical Materials Res

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Spurred by the current advancements in engineering various intelligent nanoparticle‐based drug delivery systems, conjugation of drugs with the stimuli‐responsive molecular switches has become one of the most efficient approaches to deliver a drug cargo in spatiotemporal controlled fashions. In this study, we fabricated an innovative pH‐triggered hydrazone‐carboxylate complex of doxorubicin (Dox), which was subsequently encapsulated in the layered double hydroxide (LDH) nanoparticles for effective cancer therapeutics. These two‐dimensional (2D) biodegradable matrices efficiently delivered Dox by pH‐triggered release in the acidic lysosomal environment and their subsequent escape to cytosol. Moreover, the delivered Dox molecules and high positively‐charged surfaces of LDHs facilitated the cancer cell ablation via enhancing the cathepsins‐mediated cell apoptosis assisted by free radical species generation. The critical advancements in the nanoparticle‐based designs and substantial ablation of tumor cells through a free radical attack indicate that the designed pH‐triggered drug composites can be used for efficient cancer therapeutics. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1184–1194, 2019.

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Sol-gel synthesis and characterization of hybrid inorganic-organic Tb(III)-terephthalate containing layered double hydroxides

Cited by 25 publications

References 36 publications

Undoped and Eu3+ Doped Magnesium-Aluminium Layered Double Hydroxides: Peculiarities of Intercalation of Organic Anions and Investigation of Luminescence Properties

Undoped and Eu3+ Doped Magnesium-Aluminium Layered Double Hydroxides: Peculiarities of Intercalation of Organic Anions and Investigation of Luminescence Properties

Investigation of Structural and Luminescent Properties of Sol-Gel-Derived Cr‑Substituted Mg3Al1−xCrx Layered Double Hydroxides

Engineered pH‐responsive hydrazone‐carboxylate complexes‐encapsulated 2D matrices for cathepsin‐mediated apoptosis in cancer

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