Green synthesis of lanthanum oxide nanoparticles using Moringa oleifera leaves extract and its biological activities

Maheshwaran, G.; Selvi, M.; Muneeswari, R. Selva; Bharathi, A.; Kumar, M. Krishna; Sudhahar, S.

doi:10.1016/j.apt.2021.04.004

Cited by 31 publications

(22 citation statements)

References 29 publications

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“…S4 . The framework decomposition of both Ln-MOFs was attributed to the formation of a body-centered cubic form of Ln 2 O 3 31 that was also physically observed by the colour change of the samples after being heated.…”

Section: Resultsmentioning

confidence: 76%

A new mode of luminescence in lanthanide oxalates metal–organic frameworks

Alzard

Siddig

Saleh

et al. 2022

Sci Rep

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Two lanthanide metal–organic frameworks [Ln-MOFs, Ln = Eu(III), Tb(III)] composed of oxalic acid and Ln building units were hydrothermally synthesized and fully characterized by powder X-ray diffraction, Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscope, and energy-dispersive X-ray spectroscopy. Furthermore, their magnetic susceptibility measurements were obtained using SQUID based vibrating sample magnetometer (MPMS 3, Quantum Design). Both Ln-MOFs exhibited highly efficient luminescent property. Solid-state photoluminescence (PL) measurements revealed phosphorescence emission bands of Eu-MOF and Tb-MOF centered at 618 nm (red emission) and 550 nm (green emission) upon excitation at 396 nm and 285 nm, respectively. Eu-MOF and Tb-MOF displayed a phosphorescence quantum yield of 53% and 40%, respectively. Time-resolved PL analyses showed very long lifetime values, at 600 and 1065 ± 1 µs for Eu-MOF and Tb-MOF, respectively. Calculations performed by density functional theory indicated a charge transfer form metal centres to the ligand which was in good agreement with the experimental studies. Therefore, this new mode of highly photoluminescent MOF materials is studied for the first time which paves the way for better understanding of these systems for potential applications.

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Section: Resultsmentioning

confidence: 76%

A new mode of luminescence in lanthanide oxalates metal–organic frameworks

Alzard

Siddig

Saleh

et al. 2022

Sci Rep

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“…In contrast to the ET-CCSs, the abundances of C–C and C–H were higher on the surface of the ET-CCSPDs, which was attributed to the addition of PDDA. For the O 1s high-resolution spectra depicted in Figure e and Figure S9b, the oxygen element exhibited two different chemical states (O α and O β ) in ET-CCS: the prominent peak at 531.2 eV (O α ) belonged to O–CO or N–CO, and the peak at 536.1 eV (O β ) was attributed to the oxygen atoms ionizing and bonding to zirconium ions . Compared with the ET-CCSs, the abundance of O α in the ET-CCSPDs significantly increased (94.5% vs 45.0%), which was due to the abundant amide bonds (−CO–NH−) of the cross-linker MBA in PDDA network.…”

Section: Resultsmentioning

confidence: 98%

Ultraporous Polyquaternium-Carboxylated Chitosan Composite Hydrogel Spheres with Anticoagulant, Antibacterial, and Rapid Endotoxin Removal Profiles for Sepsis Treatment

Liu

Jiang

et al. 2022

Biomacromolecules

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Hemoperfusion is an important method to remove endotoxins and save the lives of patients with sepsis. However, the current adsorbents for hemoperfusion have disadvantages of insufficient endotoxin adsorption capacity, poor blood compatibility, and so on. Herein, we proposed a novel emulsion templating (ET) method to prepare ultraporous and double-network carboxylated chitosan (CCS)-poly(diallyl dimethylammonium chloride) (PDDA) hydrogel spheres (ET-CCSPD), bearing both negative and positive charges. CCS was introduced to balance the strong positive charges of PDDA to improve hemocompatibility, and emulsion templates endowed the adsorbent with an ultraporous structure for enhanced adsorption efficacy. The ET-CCSPDs neither damaged blood cells nor activated complement responses. In addition, the activated partial thromboplastin time (APTT) was prolonged to 8.5 times, which was beneficial for reducing the injection of anticoagulant in patients. The ET-CCSPDs had excellent scavenging performance against bacteria and endotoxin, with removal ratios of 96.7% for E. coli and 99.8% for S. aureus, respectively, and the static removal ratio of endotoxin in plasma was as high as 99.1% (C 0 = 5.50 EU/mL, critical illness level). An adsorption cartridge filled with the ET-CCSPDs could remove 84.7% of endotoxin within 1 h (C 0 = 100 EU/mL in PBS). Interestingly, the ET-CCSPDs had a good inhibitory effect on the cytokines produced by endotoxin-mediated septic blood. By developing the ET method to prepare ultraporous and double-network adsorbents, the problems of low adsorption efficiency and poor blood compatibility of traditional endotoxin adsorbents have been solved, thus opening a new route to fabricate absorbents for blood purification.

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“…It was detected that the WGE ZnO NPs synthesized using 50 mL of the WGE were found to have the maximum anti‐inflammatory activity compared to other synthesized analogs of WGE ZnO NPs (Figure 11, Table S5) [58] . The most dominant anti‐inflammatory mechanism shown by ZnO NPs is suppressing the expression of the COX‐2 enzyme, which has an indispensable part in developing cardinal signs of inflammation and suppressing the expression of inflammation marker genes [59] . WGE ZnO NPs amend the release of protein and expression of inflammation by hindering the NF‐KB pathway.…”

Section: Resultsmentioning

confidence: 99%

“…[58] The most dominant antiinflammatory mechanism shown by ZnO NPs is suppressing the expression of the COX-2 enzyme, which has an indispen- ChemistrySelect sable part in developing cardinal signs of inflammation and suppressing the expression of inflammation marker genes. [59] WGE ZnO NPs amend the release of protein and expression of inflammation by hindering the NF-KB pathway. Synthesis and release of NO are also suppressed, which has a crucial role in the pathogenesis of various inflammatory disorders.…”

Section: Anti-inflammatory Activitymentioning

confidence: 99%

Visible Light Driven Photodegradation of Pathological Effluents and Biological Evaluation of Green ZnO Nanoparticles

et al. 2022

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ZnO nanoparticles (NPs) are biosynthesized for the first time with the aqueous wheatgrass extract (WGE) using the solution combustion method. The synthesized nanoparticles were characterized by XRD, SEM, TEM, DLS, TGA, UV‐Vis. and FTIR. The synthesized ZnO NPs were crystalline, having a wurtzite structure, with an average particle size of 25 nm, confirmed from TEM and DLS. The biosynthesized ZnO NPs from WGE has shown excellent activity against Gram‐positive and Gram‐negative bacteria. They also exhibited good antioxidant and anti‐inflammatory activities with IC50 value of 4.63 μg/mL. When treated with MCF‐7 cell lines, these biosynthesized WGE ZnO NPs have shown a remarkable decline in the cell viability with IC50 value of 44.67 μg/mL. Under the visible light, crystal violet and safranin stains have shown excellent degradation at neutral pH without any reductant, indicating that these green WGE ZnO NPs can serve as a potential photocatalyst in treating wastewater effluents.

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Green synthesis of lanthanum oxide nanoparticles using Moringa oleifera leaves extract and its biological activities

Cited by 31 publications

References 29 publications

A new mode of luminescence in lanthanide oxalates metal–organic frameworks

A new mode of luminescence in lanthanide oxalates metal–organic frameworks

Ultraporous Polyquaternium-Carboxylated Chitosan Composite Hydrogel Spheres with Anticoagulant, Antibacterial, and Rapid Endotoxin Removal Profiles for Sepsis Treatment

Visible Light Driven Photodegradation of Pathological Effluents and Biological Evaluation of Green ZnO Nanoparticles

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