56301-52-1Relevant articles and documents
N-substituted phenothiazine derivatives: How the stability of the neutral and radical cation forms affects overcharge performance in lithium-ion batteries
Narayana, Kishore Anand,Casselman, Matthew D.,Elliott, Corrine F.,Ergun, Selin,Parkin, Sean R.,Risko, Chad,Odom, Susan A.
, p. 1179 - 1189 (2015)
Phenothiazine and five N-substituted derivatives were evaluated as electrolyte additives for overcharge protection in LiFePO4/synthetic graphite lithium-ion batteries. We report on the stability and reactivity of both the neutral and radical-cation forms of these six compounds. While three of the compounds show extensive overcharge protection, the remaining three last for only one to a few cycles. UV/Vis studies of redox shuttle stability in the radical cation form are consistent with the overcharge performance: redox shuttles with spectra that show little change over time exhibit extensive overcharge performance, whereas those with changing spectra have limited overcharge protection. In one case, we determined that a C-N bond cleaves upon oxidation, forming the phenothiazine radical cation and leading to premature overcharge protection failure; in another case, poor solubility appears to limit protection.
Electron transfer between n-substituted phenothiazines and the 1- oxopiperidinium ion in the presence of β-cyclodextrin
Zheng, Xiao-Qi,Ruan, Xiu-Qin,Wang, Wei,Zhang, Hai-Ming,Guo, Qing-Xiang,Liu, You-Cheng
, p. 253 - 257 (2007/10/03)
The electron-transfer reactions between N-substituted phenothiazines and 4-acetoxy-2,2,6,6-tetramethyl-1-oxopiperidinium hexachloroantimonate (ATPO) in the presence of β-cyclodextrin (β-CD) in an aqueous solution have been studied. N-phenylphenothiazine (
Endor Studies of Cation Radicals from Pharmacologically Active Phenothiazines
Helle, N.,Kurreck, H.,Bock, M.,Kieslich, W.
, p. 964 - 970 (2007/10/02)
A variety of substituted phenothiazine cation radicals, including those from pharmacologically active derivatives, e.g. chloropromazine, alimemazine and laevomepromazine, have been studied by means of ENDOR and TRIPLE resonace spectroscopy.These techniques allowed accurate determinations of hyperfine coupling constants, including their signs.Conclusions concerning molecular structure (e.g. twist angles) could be drawn, supporting previous investigations of the interrelationship of molecular conformations with the pharmacological potential, i.e. neuroleptic, antihistaminic or anti-Parkinsonian.
Kinetics and mechanism of the reaction of 10-phenylphenothiazine dication with water in acetonitrile
Yasukouchi, Kazuo,Taniguchi, Isao,Yamaguchi, Hiroko,Ayukawa, Jiro,Ohtsuka, Koichi,Tsuruta, Yukio
, p. 1679 - 1683 (2007/10/02)
The reaction of electrogenerated 10-phenylphenothiazine (PPTZ) dication (PPTZ2+) with water was investigated in acetonitrile containing 0.5 M NaClO4 by cyclic voltammetry and controlled-potential electrolysis. The cyclic voltammogram