نتایج جستجو برای: fe3 ions chemosensor
تعداد نتایج: 138952 فیلتر نتایج به سال:
zinc ferrite (znfe2o4) nanoparticles were synthesized via the auto-combustion assisted sol-gel method of zn2+ and fe3+ ions (molar ratio 1:2) in ammonia solution. the prepared nanomagnetic catalyst was characterized by ir, xrd, sem and icp. the diameter of the znfe2o4 mnps (63.7 nm) was determined by debye-scherre equation via their xrd pattern. nanomagnetic znfe2o4 efficiently catalyzes oxidat...
The characteristics of hydroperoxide activation of 5-lipoxygenase were examined in the high speed supernatant fraction prepared from rat polymorphonuclear leukocytes. Stimulation of 5-lipoxygenase activity by the 5-hydroperoxyeicosatetraenoic acid (5-HPETE) reaction product was strongly dependent on the presence of thiol compounds. Various reducing agents such as mercaptoethanol and glutathione...
The valence states of Fe atoms and the formation oxygen vacancies in substituted La0.67Sr0.33FeO3−γ orthoferrite have been studied detail by low-temperature Mössbauer spectroscopy under removal. It has shown that averaged state is not revealed with a decreasing measurement temperature. This makes it possible to reveal Fe4+ ions. Analysis obtained data allows us conclude presence several Zeeman ...
The spectroscopic properties of Fe3+ in tetrahedral d-sites of GGG and the effect of co-doping with ~ m 3 + are investigated. It is thus shown that a very efficient energy transfer from ~ e 3 + (d) to ~ m ~ + takes place due to a good superposition of Fe emission and Tm 3 ~ 6 > 3 ~ 4 absorption spectra and due to a favorable packing of the d-sites around the dodecahedral site occupied by Tm. It...
We have designed and synthesized the highly selective and reversible fluorescent chemosensor 1 for Au(3+) by modifications on the fluorescent copper chemodosimeter 2, and we have further demonstrated that chemosensor 1 could be employed to image Au(3+) in living cells.
A new chelating ligand [4-methyl-2,6-bis-(pyridin-2-yl-hydrazonomethyl)-phenol] (1) was prepared by the condensation of 2-hydrazinylpyridine with 2,6-diformyl-p-cresol. Compound 1 exhibits weak fluorescence due to intramolecular photoinduced electron transfer (PET). The sensor (1) demonstrates Zn(2+)-specific emission enhancement due to the “PET off” process through a 1:1 binding mode with the ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید