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Intra‐ and Inter‐molecular Sulf‐ hydryl Hydrogen Bonding: Facilitating Proton Transfer Events for Determination of pH in Sea Water
Author(s) -
Sisodia Neel,
Miranda Monica,
McGuinness Kay L.,
Wadhawan Jay D.,
Lawrence Nathan S.
Publication year - 2021
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/elan.202060332
Subject(s) - phenol , electrochemistry , proton , chemistry , redox , hydrogen bond , electrode , molecule , polymer , inorganic chemistry , glassy carbon , analytical chemistry (journal) , chromatography , cyclic voltammetry , organic chemistry , physics , quantum mechanics
This work presents the electrochemical response of a 2‐(methylthio)phenol glassy carbon based electrode for a promising voltammetric pH sensor in both buffered and low‐buffered solutions. Electropolymerization of the redox species was performed with the resulting polymer presenting a Nernstian response in buffered media, with a sensitivity of 51 mV/pH unit. The effectiveness of the sulfhydryl bond to facilitate proton transfer from the bulk solution to the phenol molecules has been confirmed, providing an accurate pH measurement of 8.28 in sea water media, compared to that measured with a calibrated glass pH probe of 8.30.