Electrochemistry of tris(quinoxaline-2,3-dithiolato)molybdate(IV) in acidic solution; multi-electron ligand-based redox activity

Clinical Evaluation of Radio-Labelled Bleomycin for Tumor Detection

Nuklearmedizin ◽

10.1055/s-0037-1620700 ◽

1978 ◽

Vol 17 (06) ◽

pp. 238-248

Author(s):

H. Beekhuis ◽

M.A.P.C. van de Poll ◽

A. Versluis ◽

H. Jurjens ◽

M.G. Woldring ◽

...

Keyword(s):

Clinical Evaluation ◽

Acidic Solution ◽

Tumor Detection ◽

Neutral Solution ◽

Normal Tissues ◽

Patients With Cancer ◽

Tumor Bearing

Investigations with bleomycin labelled with radionuclides other than 57Co in patients with cancer and in tumor-bearing animals are described. In patients 57Co-bleo appears to be a better tumor-seeking radiopharmaceutical than 111In-bleo, 99mTc-bleo or 197Hg-bleo. This can be explained by a higher stability in vivo and a better tumor-seeking property of 57Co-bleo and less disturbing activity in the cardiac pool and in bone and other normal tissues when assessing the scintigram.Results with 111In-bleo labelled in acidic solution are not essentially different from those with 111In-bleo labelled in neutral solution.Results of 197Hg-bleo are almost identical with those of 197HgCl2 regarding the tumor-seeking effect as well as the distribution in normal tissues and organs. Probably the complex of 197Hg to bleomycin is not stable in vivo. The superiority of 57Co-bleo over 99mTc-bleo, 197Hg-bleo and also over 67Cu-bleo is confirmed by experiments on tumor bearing animals.We may conclude that the indication for use of bleomycin as a tumor-seeking pharmaceutical labelled with 111In, 99mTc, 197Hg or 67Cu seems to be very limited.

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Kinetics of the Formaldehyde Oxidation on a Platinum Electrode Modified with UPD-lead in Acidic Solution II*

Zeitschrift für Physikalische Chemie ◽

10.1524/zpch.1994.185.part_1.091 ◽

1994 ◽

Vol 185 (Part_1) ◽

pp. 91-102 ◽

Cited By ~ 2

Author(s):

Maria Bełtowska-Brzezinska ◽

Jacek Stelmach

Keyword(s):

Acidic Solution ◽

Platinum Electrode ◽

Formaldehyde Oxidation ◽

Kinetics Of

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Tuning the Redox Activity of Metal−Organic Frameworks for Enhanced, Selective O2 Binding

10.26434/chemrxiv.10316681.v1 ◽

2019 ◽

Author(s):

Andrew Rosen ◽

M. Rasel Mian ◽

Timur Islamoglu ◽

Haoyuan Chen ◽

Omar Farha ◽

...

Keyword(s):

Density Functional ◽

Metal Organic Frameworks ◽

Redox Activity ◽

Screening Methods ◽

Bridging Ligands ◽

Metal Centers ◽

Computational Screening ◽

Open Metal Sites ◽

Metal Organic ◽

Unsaturated Metal Sites

Metal−organic frameworks (MOFs) with coordinatively unsaturated metal sites are appealing as adsorbent materials due to their tunable functionality and ability to selectively bind small molecules. Through the use of computational screening methods based on periodic density functional theory, we investigate O2 and N2 adsorption at the coordinatively unsaturated metal sites of several MOF families. A variety of design handles are identified that can be used to modify the redox activity of the metal centers, including changing the functionalization of the linkers (replacing oxido donors with sulfido donors), anion exchange of bridging ligands (considering μ-Br-, μ-Cl-, μ-F-, μ-SH-, or μ-OH- groups), and altering the formal oxidation state of the metal. As a result, we show that it is possible to tune the O2 affinity at the open metal sites of MOFs for applications involving the strong and/or selective binding of O2. In contrast with O2 adsorption, N2 adsorption at open metal sites is predicted to be relatively weak across the MOF dataset, with the exception of MOFs containing synthetically elusive V2+ open metal sites. As one example from the screening study, we predict that exchanging the μ-Cl- ligands of M2Cl2(BBTA) (H2BBTA = 1H,5H-benzo(1,2-d:4,5-d′)bistriazole) with μ-OH- groups would significantly enhance the strength of O2 adsorption at the open metal sites without a corresponding increase in the N2 affinity. Experimental investigation of Co2Cl2(BBTA) and Co2(OH)2(BBTA) confirms that the former exhibits only weak physisorption, whereas the latter is capable of chemisorbing O2 at room temperature. The chemisorption behavior is attributed to the greater electron-donating character of the μ-OH- ligands and the presence of H-bonding interactions between the μ-OH- bridging ligands and the O2 adsorbate.

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Fabrication of Conductive Textile via Chemical Oxidative Polymerization of Aniline on Polyester Cloth

10.26434/chemrxiv.6154757.v1 ◽

2018 ◽

Author(s):

alireza razaghi

Keyword(s):

Acidic Solution ◽

Oxidative Polymerization ◽

Morphological Structure ◽

Infrared Spectrometry ◽

Aniline Monomer ◽

Polyester Textile ◽

Conductive Polyaniline ◽

Conductive Textile ◽

Polymerization Conditions ◽

Aniline Polymerization

In this research aniline polymerization conditions were optimized in presence of pre-treated polyester textile to achieve as high electrical conductivity as 100 S/Cm. Alkaline activation of the polyester textile was followed by immersion in to aqueous acidic solution of aniline monomer. Then the oxidant solution was used to initiate the polymerization. Finally, the prepared product was washed and dried prior to ant test. Functional groups were studied by Fourie-transformed infrared spectrometry (FTIR) from the surface of the polyaniline coated textile. Also, morphological structure of synthesized conductive polyaniline was studied by scanning electron microscopy (SEM). The synthesized cloth was used in a closed circuit in order to light up alight emitting diode to emphasis the conductivity of the textile and fibres that synthesised by this method.

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Fabrication of Conductive Textile via Chemical Oxidative Polymerization of Aniline on Polyester Cloth

10.26434/chemrxiv.6154757 ◽

2018 ◽

Author(s):

alireza razaghi

Keyword(s):

Acidic Solution ◽

Oxidative Polymerization ◽

Morphological Structure ◽

Infrared Spectrometry ◽

Aniline Monomer ◽

Polyester Textile ◽

Conductive Polyaniline ◽

Conductive Textile ◽

Polymerization Conditions ◽

Aniline Polymerization

In this research aniline polymerization conditions were optimized in presence of pre-treated polyester textile to achieve as high electrical conductivity as 100 S/Cm. Alkaline activation of the polyester textile was followed by immersion in to aqueous acidic solution of aniline monomer. Then the oxidant solution was used to initiate the polymerization. Finally, the prepared product was washed and dried prior to ant test. Functional groups were studied by Fourie-transformed infrared spectrometry (FTIR) from the surface of the polyaniline coated textile. Also, morphological structure of synthesized conductive polyaniline was studied by scanning electron microscopy (SEM). The synthesized cloth was used in a closed circuit in order to light up alight emitting diode to emphasis the conductivity of the textile and fibres that synthesised by this method.

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Experimental Assessment of the Practical Oxidative Stability of Lithium Thiophosphate Solid Electrolytes

10.26434/chemrxiv.8014715.v1 ◽

2019 ◽

Author(s):

Georg Dewald ◽

Saneyuki Ohno ◽

Marvin Kraft ◽

Raimund Koerver ◽

Paul Till ◽

...

Keyword(s):

Cyclic Voltammetry ◽

Solid State ◽

Oxidative Stability ◽

Photoelectron Spectroscopy ◽

Solid Electrolytes ◽

Stability Limit ◽

Lithium Ion ◽

High Energy ◽

Redox Activity ◽

Solid State Batteries

All-solid-state batteries are often expected to replace conventional lithium-ion batteries in the future. However, the practical electrochemical and cycling stability of the best-conducting solid electrolytes, i.e. lithium thiophosphates, are still critical issues that prevent long-term stable high-energy cells. In this study, we use stepwisecyclic voltammetry to obtain information on the practical oxidative stability limit of Li10GeP2S12, a Li2S‑P2S5glass, as well as the argyrodite Li6PS5Cl solid electrolytes. We employ indium metal and carbon black as the counter and working electrode, respectively, the latter to increase the interfacial contact area to the electrolyte as compared to the commonly used planar steel electrodes. Using a stepwise increase in the reversal potentials, the onset potential at 25 °C of oxidative decomposition at the electrode-electrolyte interface is identified. X‑ray photoelectron spectroscopy is used to investigate the oxidation of sulfur(-II) in the thiophosphate polyanions to sulfur(0) as the dominant redox process in all electrolytes tested. Our results suggest that after the formation of these decomposition products, significant redox behavior is observed. This explains previously reported redox activity of thiophosphate solid electrolytes, which contributes to the overall cell performance in solid-state batteries. The stepwise cyclic voltammetryapproach presented here shows that the practical oxidative stability at 25 °C of thiophosphate solid electrolytes against carbon is kinetically higher than predicted by thermodynamic calculations. The method serves as an efficient guideline for the determination of practical, kinetic stability limits of solid electrolytes.

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Experimental Assessment of the Practical Oxidative Stability of Lithium Thiophosphate Solid Electrolytes

10.26434/chemrxiv.8014715 ◽

2019 ◽

Author(s):

Georg Dewald ◽

Saneyuki Ohno ◽

Marvin Kraft ◽

Raimund Koerver ◽

Paul Till ◽

...

Keyword(s):

Cyclic Voltammetry ◽

Solid State ◽

Oxidative Stability ◽

Photoelectron Spectroscopy ◽

Solid Electrolytes ◽

Stability Limit ◽

Lithium Ion ◽

High Energy ◽

Redox Activity ◽

Solid State Batteries

All-solid-state batteries are often expected to replace conventional lithium-ion batteries in the future. However, the practical electrochemical and cycling stability of the best-conducting solid electrolytes, i.e. lithium thiophosphates, are still critical issues that prevent long-term stable high-energy cells. In this study, we use stepwisecyclic voltammetry to obtain information on the practical oxidative stability limit of Li10GeP2S12, a Li2S‑P2S5glass, as well as the argyrodite Li6PS5Cl solid electrolytes. We employ indium metal and carbon black as the counter and working electrode, respectively, the latter to increase the interfacial contact area to the electrolyte as compared to the commonly used planar steel electrodes. Using a stepwise increase in the reversal potentials, the onset potential at 25 °C of oxidative decomposition at the electrode-electrolyte interface is identified. X‑ray photoelectron spectroscopy is used to investigate the oxidation of sulfur(-II) in the thiophosphate polyanions to sulfur(0) as the dominant redox process in all electrolytes tested. Our results suggest that after the formation of these decomposition products, significant redox behavior is observed. This explains previously reported redox activity of thiophosphate solid electrolytes, which contributes to the overall cell performance in solid-state batteries. The stepwise cyclic voltammetryapproach presented here shows that the practical oxidative stability at 25 °C of thiophosphate solid electrolytes against carbon is kinetically higher than predicted by thermodynamic calculations. The method serves as an efficient guideline for the determination of practical, kinetic stability limits of solid electrolytes.

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Corrosion Behavior of Layered Ternary Carbide Ti2AlC in Acidic Solution

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2009.00402 ◽

2009 ◽

Vol 24 (2) ◽

pp. 402-406 ◽

Cited By ~ 1

Author(s):

Jing-Ping WANG ◽

Bing-Chu MEI ◽

Wei-Bing ZHOU ◽

Ping WANG ◽

Shu-Xia YANG

Keyword(s):

Corrosion Behavior ◽

Acidic Solution ◽

Ternary Carbide

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Adsorption and advanced oxidation of diverse pharmaceuticals and personal care products (PPCPs) from water using highly efficient rGO–nZVI nanohybrids

Environmental Science Water Research & Technology ◽

10.1039/d0ew00140f ◽

2020 ◽

Vol 6 (8) ◽

pp. 2223-2238 ◽

Cited By ~ 2

Author(s):

Arvid Masud ◽

Nita G. Chavez Soria ◽

Diana S. Aga ◽

Nirupam Aich

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Personal Care Products ◽

Advanced Oxidation ◽

Zero Valent Iron ◽

Redox Activity ◽

Personal Care ◽

Adsorption Sites ◽

Reduced Graphene ◽

Nanoscale Zero Valent Iron

Reduced graphene oxide-nanoscale zero valent iron (rGO–nZVI) nanohybrid, with tunable adsorption sites of rGO and unique catalytic redox activity of nZVI, perform enhanced removal of diverse PPCPs from water.

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