Formation and characterization of platinum(III)-ammonia complex ions using pulse radiolysis

1982 ◽  
Vol 21 (4) ◽  
pp. 1489-1497 ◽  
Author(s):  
Hasan M. Khan ◽  
William L. Waltz ◽  
Jochen. Lilie ◽  
Robert J. Woods
Keyword(s):  
Pulse Radiolysis ◽  
Complex Ions ◽  
Ammonia Complex

Formation and characterization of platinum(III)-ethylenediamine complex ions using pulse radiolysis

1980 ◽  
Vol 19 (11) ◽  
pp. 3284-3291 ◽  
Author(s):  
William L. Waltz ◽  
Jochen Lilie ◽  
R. Tom Walters ◽  
Robert J. Woods
Keyword(s):  
Pulse Radiolysis ◽  
Complex Ions ◽  
Ethylenediamine Complex

Formation and characterization of transitory platinum–ammonia complex ions using pulse radiolysis

1981 ◽  
Vol 59 (24) ◽  
pp. 3319-3325 ◽  
Author(s):  
Hasan M. Khan ◽  
William L. Waltz ◽  
Robert J. Woods ◽  
Jochen Lilie
Keyword(s):  
Hydrogen Atom ◽  
Pulse Radiolysis ◽  
Aqueous Media ◽  
Hydrated Electron ◽  
Complex Ions ◽  
Initial Product ◽  
Detection Analysis ◽  
Diffusion Controlled ◽  
Ammonia Complex ◽  
Long Term Behavior

The reactions of tetraammineplatinum(II) complex ion with the hydrated electron and hydrogen atom have been investigated in aqueous media using the technique of pulse radiolysis coupled with absorption and conductivity detection. Analysis has also been carried on pulse-irradiated solutions for the formation of free ammonia and for changes in concentration of Pt(II). The hydrated electron and hydrogen atom react with the complex at near diffusion-controlled rates, with the respective rate constant being 1.9 ± 0.1 × 1010 M−1 s−1 and 2.8 ± 0.3 × 1010 M−1 s−1. The nascent products of these reactions are shown to be different transitory species. For the electron reaction, the initial product is Pt(NH3)4+ in which the metal center is formally Pt(I). In acidic media, there is a subsequent and rapid release of two ammonia ligands, with only the second step being measurable (k = 4.2 ± 1.7 × 104 s−1). In the reaction of H atom, the results support the occurrence of an addition process, giving rise to a hydrido type product. This species undergoes a first-order reaction (k = 2.2 ± 0.6 × 104 s−1); however the process is not associated with a change in conductivity, and thus it is not one involving loss of ammonia. Subsequent to this process, the loss of one ammonia ligand is observed, with k = 2.0 ± 0.6 × 103 s−1. The natures of these transients and the long term behavior of these systems are discussed.

A one-pot method to prepare a ZnO/Ag/polypyrrole composite for zinc alkaline secondary batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 33814-33817 ◽  
Author(s):  
Jianhang Huang ◽  
Zhanhong Yang
Keyword(s):  
Reducing Agent ◽  
Metallic Silver ◽  
Complex Ions ◽  
One Pot ◽  
Ammonia Complex ◽  
Pyrrole Monomer ◽  
Polypyrrole Composite

A ZnO/Ag/polypyrrole (ZAP) composite was synthesized by a facile one-pot method in which silver ammonia complex ions were reduced to metallic silver using a pyrrole monomer as the reducing agent. Meanwhile, the pyrrole monomer was oxidized and formed polypyrrole.

The generation and spectral characterization of oligothiophenes radical cations. A pulse radiolysis investigation

1999 ◽  
Vol 54 (3) ◽  
pp. 263-270 ◽  
Author(s):  
S.S. Emmi ◽  
M. D’Angelantonio ◽  
G. Beggiato ◽  
G. Poggi ◽  
A. Geri ◽  
...  
Keyword(s):  
Pulse Radiolysis ◽  
Radical Cations ◽  
Spectral Characterization
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