14635-83-7Relevant articles and documents
Nanoinhibitory Impacts of Salicylic Acid, Glycyrrhizic Acid Ammonium Salt, and Boric Acid Nanoparticles against Phytoplasma Associated with Faba Bean
Abdelkhalik, Abdelsattar,Ahmed, Eman A.,El-Garhy, Hoda A. S.,Farrag, Amro A.,Ismail, Ismail A.,Shoala, Tahsin
, (2022/03/01)
Phytoplasmas are economically important plant pathogenic bacterial diseases, causing severe yield losses worldwide. In this study, we tested nanoformulations such as glycyrrhizic acid ammonium salt (GAS), salicylic acid (SA), and boric acid (BA) as novel antimicrobial agents inducing the resistance against the phytoplasma disease in faba bean. The nanoparticles (NP) were foliarapplied to naturally phytoplasma-infected faba bean with three concentrations from each of SA, GAS, and BA, under field conditions. Nested PCR (using universal primer pairs P1/P7 and R16F2n/R16R2) were reacted positively with all symptomatic samples and gave a product size of approximately 1200 bp, while the healthy plant gave no results. Transmission electron microscopy examinations of phytoplasma-infected faba bean plants treated with different nanoparticles revealed that severe damage occurred in phytoplasma particle’s structure, degradation, malformation, lysis in the cell membrane, and the cytoplasmic leakage followed by complete lysis of phytoplasma cells. Exogenous application of GAS-NP (1.68 μM), SA-NP (0.28 μM), and BA-NP (0.124 μM) suppressed the infection percentage of phytoplasma by 75%, 50%, and 20%, and the disease severity by 84%, 64%, and 54%, respectively. Foliar application of nanoparticles improved Fv/Fm (maximum quantum efficiency of PSII Photochemistry), PI (the performance index), SPAD chlorophyll (the relative chlorophyll content), shoots height, and leaves number, thus inducing recovery of the plant biomass and green pods yield. The most effective treatment was GAS-NP at 1.68 μM that mediated substantial increases in the shoots’ fresh weight, shoots’ dry weight, number of pods per plant, and green pods yield by 230%, 244%, 202% and 178%, respectively, compared to those of infected plants not sprayed with nanoparticles. This study demonstrated the utility of using nanoparticles, particularly GAS-NP at 1.68 μM to suppress the phytoplasma infection.
The Stability of Diphosphino-Boryl PBP Pincer Backbone: PBP to POP Ligand Hydrolysis
Fang, Fei,Xue, Man-Man,Ding, Man,Zhang, Jie,Li, Shujun,Chen, Xuenian
, p. 2489 - 2494 (2021/07/26)
Since moisture may frequently be present in many solvents, it is important to know the reactivity of a catalyst against water for catalytic reactions. In order to explore the stability and understand the transformation process of diphosphino-boryl-based PBP pincer platform, [PdCl{B(NCH2PtBu2)2?o-C6H4}] (1) was treated with PdCl2, HB(NCH2PPh2)2?o-C6H4 was reacted with [PdCl2(cod)] (cod=cyclo-octa-1,5-diene) and [Pd2(dba)3] (dba=dibenzylideneacetone), respectively, in the presence of water. Some novel palladium POP complexes, [Pd2Cl2(μ-Cl){μ-κ3-P,O,P?OB(NCH2PtBu2)2?o-C6H4}] (2 a), [Pd4(μ-Cl)2(μ-O)2{μ-κ3-P,O,P?OB(NCH2PPh2)2?o-C6H4}2] (2 b), [Pd2{μ-κ4-P,P,P,P?O(B(NCH2PPh2)2?o-C6H4)2}{μ-κ2-P,P?(NHCH2PPh2)2?o-C6H4}] (3), were obtained. It was found that the PBP pincer backbone can easily be converted into a POP backbone in the presence of water. From the crystal structures of the resultant palladium complexes, possible pincer backbone transformation pathways were discussed.
Detection of hydrogen peroxide using dioxazaborocanes: elucidation of the sensing mechanism at the molecular level by NMR and XPS measurements
Caron, Thomas,Palmas, Pascal,Frénois, Céline,Méthivier, Christophe,Pasquinet, Eric,Pradier, Claire-Marie,Serein-Spirau, Fran?oise,Hairault, Lionel,Montméat, Pierre
, p. 4114 - 4121 (2020/03/19)
A fluorescent dioxazaborocane was synthesised and characterized, in order to study its turn-off sensing process for hydrogen peroxide detection. The exposure of the dioxazaborocane to diluted vapours of H2O2 led to a strong non reversible quenching of the fluorescence. Both NMR and XPS analyses were carried out before and after exposure of dioxazaborocane to H2O2 vapours. They unequivocally show that the boron atom is oxidised in the film with cleavage of the N-B dative bond. Identification of products such as phenol and boric acid by NMR, supported by consistent XPS data, enabled the whole reaction sequence that explains the fluorescence quenching of dioxazaborocane upon H2O2 exposure to be described accurately. Direct hydrolysis of dioxazaborocane to diol, without oxidation, was only marginally observed.
