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A Combined Electrochemical Quartz‐Crystal Microbalance Probe Beam Deflection (EQCM‐PBD) Study of Solvent and Ion Transfers at a Poly[Ni(saltMe)]‐Modified Electrode During Redox Switching
Author(s) -
VilasBoas M.,
Henderson M. J.,
Freire C.,
Hillman A. R.,
Vieil E.
Publication year - 2000
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(20000403)6:7<1160::aid-chem1160>3.0.co;2-2
Subject(s) - quartz crystal microbalance , electrochemistry , chemistry , redox , electrode , perchlorate , analytical chemistry (journal) , polymerization , inorganic chemistry , monomer , acetonitrile , ion , adsorption , polymer , organic chemistry
The oxidative polymerisation of the complex2,3‐dimethyl‐ N , N ′‐bis(salicylidene)butane‐2,3‐diaminatonickel( II ), [Ni(saltMe)], was monitored by the electrochemical quartz microbalance (EQCM) and crystal impedance techniques. Polymerisation efficiency was maintained throughout deposition of a film, which behaved rigidly, on the electrode. A combined EQCM‐PBD (probe beam deflection) study of the redox process of the film exposed to a monomer‐free solution of 0.1 M tetraethylammonium perchlorate (TEAP) in acetonitrile showed an electroneutrality mechanism dominated by anion movement accompanied by co‐transfer of solvent above 0.8 V. The individual contributions of all the mobile species involved in the redox switching of the poly[Ni(saltMe)] film were determined quantitatively by temporal convolution analysis; the estimated solution‐phase diffusion coefficient of the exchanged species was 1.24×10 −5 cm 2 s −1 .