Ionic liquid mediated morphologically improved lanthanum oxide nanoparticles by Andrographis paniculata leaves extract and its biomedical applications

Muthulakshmi, V.; Murugesan, Balaji; Muthusubramanian, Shanmugam

doi:10.1016/j.jre.2019.06.006

Cited by 27 publications

(14 citation statements)

References 31 publications

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“…Spectra were observed in frequency range of 500-4000 cm -1 . The peaks at 502 ,644, 845 and 1077 cm -1 represent La-O bond stretching vibration (33,34,67,68).…”

Section: Resultsmentioning

confidence: 99%

“…Among these alluring and potentially beneficial rare earth MOs, is La 2 O 3 which has an energy gap of 4.3-5.8 eV (30,31). Due to rare electronic configuration [4f electrons] lanthanides, its applications have been reported in diverse fields (32,33). La 2 O 3 has properties that set it apart from the other oxides in the series, due to the fact that La 3+ is only trivalent cation in rare earth elements without 4f electrons and possess a simple xenon-like electronic structure (34).…”

Section: Introductionmentioning

confidence: 99%

“…(37). In numerous applications, La 2 O 3 has been used, such as H 2 storage materials, superconductors, optoelectronic gadgets, laser crystal, LEDs, biosensors, excessive refraction optical fiber, catalyst and so forth (30)(31)(32)(33)38). Additionally, as a basic element, lanthanum's oxides and hydroxides can react with CO 2 in the air to generate a less crystalline carbonate (39).…”

Section: Introductionmentioning

confidence: 99%

“…30,31 Due to the rare electronic conguration [4f electrons] in lanthanides, their applications have been reported in diverse elds. 32,33 La 2 O 3 has properties that set it apart from the other oxides in the series, due to the fact that La 3+ is the only trivalent cation among the rare-earth elements without 4f electrons and possesses a simple xenon-like electronic structure. 34 Rare-earth elements have anticoagulant, antiemetic, bactericidal, antitumor, and anticancer effects.…”

Section: Introductionmentioning

confidence: 99%

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Toward efficient dye degradation and the bactericidal behavior of Mo-doped La₂O₃ nanostructures

et al. 2022

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“…Spectra were observed in frequency range of 500-4000 cm -1 . The peaks at 502 ,644, 845 and 1077 cm -1 represent La-O bond stretching vibration (33,34,67,68).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La₂O₃ nanostructures

et al. 2022

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“…The supported membrane was prepared by mixing the hydrophobic porous polyvinylidene fluoride film (HVHP) and IL ([C 4 mim][BF 4 ] or [C 4 mim][Tf 2 N]) and the effect of ILs on the release of PO 4 3ion to form the LaPO 4 :Ce,Tb phosphor is also studied. IL-assisted sol-gel and leaves extract-based methods have been used for the synthesis of ZnO:Ce nanophosphors and Ln 2 O 3 (Ln La, Nd, Yb, Sm), respectively (Jiang et al, 2012;Veerasingam et al, 2020;Sundrarajan and Muthulakshmi, 2021 Veerasingam et al, 2020;Sundrarajan and Muthulakshmi, 2021). In another synthesis, Couroupita guianensis Abul.…”

Section: Preparative Methods For Lanthanide Ion(s)-doped Nanomaterials Using Ilmentioning

confidence: 99%

Lanthanide-Doped Luminescent Nanophosphors via Ionic Liquids

Sharma¹,

Ghosh

2021

Front. Chem.

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Lanthanide (Ln3+) ion(s)-doped or rare-earth ion(s)-doped nanomaterials have been considered a very important class of nanophosphors for various photonic and biophotonic applications. Unlike semiconductors and organic-based luminescent particles, the optical properties of Ln3+-doped nanophosphors are independent of the size of the nanoparticles. However, by varying the crystal phase, morphology, and lattice strain of the host materials along with making core-shell structure, the relaxation dynamics of dopant Ln3+ ions can be effectively tuned. Interestingly, a judicious choice of dopant ions leads to unparallel photophysical dynamics, such as quantum cutting, upconversion, and energy transfer. Recently, ionic liquids (ILs) have drawn tremendous attention in the field of nanomaterials synthesis due to their unique properties like negligible vapor pressure, nonflammability, and, most importantly, tunability; thus, they are often called “green” and “designer” solvents. This review article provides a critical overview of the latest developments in the ILs-assisted synthesis of rare-earth-doped nanomaterials and their subsequent photonic/biophotonic applications, such as energy-efficient lighting and solar cell applications, photodynamic therapy, and in vivo and in vitro bioimaging. This article will emphasize how luminescence dynamics of dopant rare-earth ions can be tuned by changing the basic properties of the host materials like crystal phase, morphology, and lattice strain, which can be eventually tuned by various properties of ILs such as cation/anion combination, alkyl chain length, and viscosity. Last but not least, different aspects of ILs like their ability to act as templating agents, solvents, and reaction partners and sometimes their “three-in-one” use in nanomaterials synthesis are highlighted along with various photoluminescence mechanisms of Ln3+ ion like up- and downconversion (UC and DC).

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Structural, vibrational, optical, and anticancer properties of Hyphaene thebaica‐reduced nano‐lanthanum oxide (La₂O₃)

Mohamed

Khalil

Hkiri

et al. 2023

Applied Organom Chemis

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Phytoextracts modulated synthesis of nano‐scaled spherical lanthanum oxide nanoparticles (La2O3 NPs) are reported using the aqueous extracts of Hyphaene thebaica as a bioreducing and chelating agent. X‐ray diffraction (XRD) pattern revealed sharp peaks and single‐phase purity. The Debye–Scherrer approximation indicated an average crystallite size of 37 nm, whereas W‐H plot revealed a crystallite size of 59 nm, complemented by the high‐resolution transmission electron microscopy (HR‐TEM). The infrared spectroscopy revealed characteristic La‐O band at 426 and 648 cm−1. K‐M function revealed the bandgap of 5.6 eV, whereas broad intense emission peaks between 345 and 750 nm. The Raman spectra revealed peaks at 182, 325, 384, and 491 cm−1. Elemental composition was confirmed using energy‐dispersive X‐ray spectroscopy (EDS) spectrum, and the spotty rings from selected area electron diffraction (SAED) indicated the crystalline nature of the HT‐La2O3 NPs. In addition, the HT‐La2O3 NPs were investigated for in vitro antioxidant, anticancer, antiangiogenic, and cytotoxic potentials. DPPH free radical scavenging activity was highest, that is, 49.54 ± 0.88% at 1000 μg/mL. MTT assay on MCF‐7 and 3T3 cell lines revealed a median lethal concentration of 114 and 43 μg/mL, respectively. The antiangiogenic effect examined by chick chorioallantoic membrane (CAM) assay indicated inhibition of 57.14 ± 0.96% at 1000‐μg/mL concentration with an IC50 of 551 μg/mL. IC50 for the brine shrimp lethality assay was 314.2 μg/mL. Our study indicates cytotoxicity of HT‐La2O3 NPs, and it further concluded that HT‐La2O3 NPs were more potent against 3T3 cells as compared with MCF‐7 cells. Further research on the biological synthesis and anticancer studies are recommended for the large‐scale applications of the La2O3 NPs.

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Ionic liquid mediated morphologically improved lanthanum oxide nanoparticles by Andrographis paniculata leaves extract and its biomedical applications

Cited by 27 publications

References 31 publications

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La₂O₃ nanostructures

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La₂O₃ nanostructures

Lanthanide-Doped Luminescent Nanophosphors via Ionic Liquids

Structural, vibrational, optical, and anticancer properties of Hyphaene thebaica‐reduced nano‐lanthanum oxide (La₂O₃)

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Ionic liquid mediated morphologically improved lanthanum oxide nanoparticles by Andrographis paniculata leaves extract and its biomedical applications

Cited by 27 publications

References 31 publications

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La2O3 nanostructures

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La2O3 nanostructures

Lanthanide-Doped Luminescent Nanophosphors via Ionic Liquids

Structural, vibrational, optical, and anticancer properties of Hyphaene thebaica‐reduced nano‐lanthanum oxide (La2O3)

Contact Info

Product

Resources

About

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La₂O₃ nanostructures

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La₂O₃ nanostructures

Structural, vibrational, optical, and anticancer properties of Hyphaene thebaica‐reduced nano‐lanthanum oxide (La₂O₃)