scholarly journals Zwitterionic form of Ugi amine H-phosphinic acid: structure and electrochemical properties

2021 ◽  
pp. 107019
Author(s):  
Mikhail Khrizanforov ◽  
Ruslan Shekurov ◽  
Almaz Zagidullin ◽  
Tatiana Gerasimova ◽  
Kamil Ivshin ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Phosphinic Acid ◽  
Zwitterionic Form ◽  
Acid Structure

Bis(imidazol-2-yl)phosphinic acid hemihydrate, [(C3H3N2)(C3H4N2)PO2].(1/2)H2O

1989 ◽  
Vol 67 (6) ◽  
pp. 1051-1060 ◽  
Author(s):  
Helen E. Howard-Lock ◽  
Colin J.L. Lock ◽  
Sarah Penny ◽  
Mary A. Turner
Keyword(s):  
Single Crystal ◽  
Vibrational Spectroscopy ◽  
Title Compound ◽  
Phosphinic Acid ◽  
Major Product ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bond Lengths ◽  
H Nmr ◽  
Zwitterionic Form

The title compound was obtained as the major product of our handling of the literature preparation of tris(imidazol-2-yl)phosphine. The compound was characterized by 1H NMR, mass and vibrational spectroscopy. The structure was determined by single crystal X-ray diffraction. Crystals were triclinic, [Formula: see text], a = 7.677(1), b = 12.658(2), c = 10.072(2) Å, α = 91.18(1),β = 114.44(1),γ = 99.49(1)°, Z = 4. Intensities were measured on a Syntex P21 diffractometer with MoKα radiation and 3088 reflections were used to determine the structure. R = 0.0698, Rw = 0.0534. The phosphinic acid exists in the solid as the zwitterionic form and bond lengths and angles are normal. Keywords: tris(imidazol-2-yl)phosphine, X-ray structure, bis(imidazol-2-yl)phosphinic acid hemihydrate.

scholarly journals Synthesis and Electrochemical properties of metal(II)-carboxyethylphenylphosphinates

2021 ◽  
Author(s):  
Montse Bazaga García ◽  
Álvaro Vílchez ◽  
Bianca Maranescu ◽  
Pascual Olivera Pastor ◽  
Marko Marganovici ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Coordination Polymers ◽  
Structural Characterization ◽  
Phosphinic Acid ◽  
Divalent Metal ◽  
Electrocatalytic Properties

We report herein the synthesis, structural characterization and electrocatalytic properties of three new coordination polymers, resulting from the combination of divalent metal (Ca2+, Cd2+ or Co2+) salts with (2-carboxyethyl)(phenyl)phosphinic acid....

Highly Luminescent 4-Pyridyl-Extended Dithieno[3,2-b:2′,3′-d]phospholes

2020 ◽  
Author(s):  
Thomas Baumgartner ◽  
Paul Demay-Drouhard
Keyword(s):  
Electrochemical Properties ◽  
Quantum Yields

The unexpectedly challenging synthesis of 4-pyridyl-extended dithienophospholes is reported. The optical and electrochemical properties of the phosphoryl-bridged species were studied experimentally and computationally, and their properties compared to their non-<i>P</i>-bridged congeners. The 4-pyridyl-extended dithieno-phospholes display quantitative luminescence quantum yields in solution.<br><br>

Highly Luminescent 4-Pyridyl-Extended Dithieno[3,2-b:2′,3′-d]phospholes

2020 ◽  
Author(s):  
Thomas Baumgartner ◽  
Paul Demay-Drouhard
Keyword(s):  
Electrochemical Properties ◽  
Quantum Yields

The unexpectedly challenging synthesis of 4-pyridyl-extended dithienophospholes is reported. The optical and electrochemical properties of the phosphoryl-bridged species were studied experimentally and computationally, and their properties compared to their non-<i>P</i>-bridged congeners. The 4-pyridyl-extended dithieno-phospholes display quantitative luminescence quantum yields in solution.<br><br>

IN VITRO ELECTROCHEMICAL PROPERTIES OF BIODEGRADABLE YSZ-COATED MgCa ALLOY

2016 ◽  
Vol 15 (5) ◽  
pp. 955-963 ◽  
Author(s):  
Corneliu Munteanu ◽  
Bogdan Istrate ◽  
Daniel Mareci ◽  
Sergiu Stanciu ◽  
Carmen-Iulia Crimu ◽  
...  
Keyword(s):  
Electrochemical Properties

ELECTROCHEMICAL PROPERTIES OF FLUORINATED HYDRAZINO-PYRAZOLES IN [BMIM+][BF4-] IONIC LIQUID

2014 ◽  
Vol 13 (8) ◽  
pp. 1987-1995 ◽  
Author(s):  
Liviu-Virgil Costea ◽  
Gunter Fafilek ◽  
Hermann Kronberger
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Properties

The study of the electrochemical properties of zinc-rich coating on the base of water sodium silicate

2019 ◽  
Vol 24 (4) ◽  
pp. 51-58
Author(s):  
Le Hong Quan ◽  
Nguyen Van Chi ◽  
Mai Van Minh ◽  
Nong Quoc Quang ◽  
Dong Van Kien
Keyword(s):  
Carbon Steel ◽  
Electrochemical Properties ◽  
Sodium Silicate ◽  
Cathodic Protection ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Electrical Contact ◽  
Electrochemical Impedance Spectra ◽  
Pure Zinc ◽  
Electric Circuits

The study examines the electrochemical properties of a coating based on water sodium silicate and pure zinc dust (ZSC, working title - TTL-VN) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl (SCE) reference electrode in 3 M solution of KCl, auxiliary electrode Pt (8x8 mm) and working electrodes (carbon steel with surface treatment up to Sa 2.5) for determination of corrosion potential (Ecorr) and calculation of equivalent electric circuits used for explanation of impedance measurement results. It was shown that electrochemical method is effective for study of corrosion characteristics of ZSC on steel. We proposed an interpretation of the deterioration over time of the ability of zinc particles in paint to provide cathodic protection for carbon steel. The results show that the value of Ecorr is between -0,9 and -1,1 V / SCE for ten days of diving. This means that there is an electrical contact between the zinc particles, which provides good cathodic protection for the steel substrate and most of the zinc particles were involved in the osmosis process. The good characteristics of the TTL-VN coating during immersion in a 3,5% NaCl solution can also be explained by the preservation of corrosive zinc products in the coating, which allows the creation of random barrier properties.

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