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Electrochemical Analysis of Ion‐Pair Formation Reactions Involving Organic Dianions Using Differential Pulse Voltammetry
Author(s) -
Miyoshi Kazuto,
Oyama Munetaka,
Okazaki Satoshi
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200107)13:11<917::aid-elan917>3.0.co;2-d
Subject(s) - chemistry , electrochemistry , differential pulse voltammetry , alkali metal , tetracyanoquinodimethane , polarography , inorganic chemistry , voltammetry , ion , cyclic voltammetry , benzoquinone , metal , analytical chemistry (journal) , electrode , molecule , organic chemistry
Electrode reduction processes involving the metal salts formation of the dianions of 2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone (DDQ) and 7,7,8,8‐tetracyanoquinodimethane (TCNQ) were observed using the differential pulse voltammetry. A systematic comparison could be performed through the determination of the association constants of the ion pairing equilibria for a series of alkali and alkaline earth metal cations (M + and M 2+ ) with DDQ 2– and TCNQ 2– . TCNQ 2– was found to have no interactions with M + and be less reactive with M 2+ than DDQ 2– , while their formation potentials are almost similar. This difference was discussed in terms of the charge distributions in the dianion states.