Kinetics of the oxidation of iodide by dicyanobis(phenanthroline)iron(III) in a binary solvent system

• DOI: 10.1002/kin.21436
• Publication Date: 2020-10-01T19:07:25Z
• Authors: Rozina Khattak; Muhammad Sufaid Khan; Shazia Summer; Rizwan Ullah; Humaira Afridi; Zainab Rehman; Summyia Masood; Hamsa Noreen; Raina Aman Qazi; Bushra Begum
• Keywords: Phenanthroline

Abstract Oxidation of the iodide ion is an important facet solar cells such as perovskite and dye‐sensitized cells. The rate reaction undoubtedly depends upon several factors. Such parameters include media, electrolyte, nature solvents, electrolyte. If these factors are optimized then can be controlled could used to get maximum benefit out it economically industrially cost‐effective uses globally environmentally benign. We studied kinetics oxidation in binary solvent system that consisted 10% (v/v) tertiary butyl alcohol water. transition metal complex dicyanobis(phenanthroline)iron(III) oxidizes spontaneously without any external triggering with a fast at 293 ± 1 K. was probed under pseudo–first‐order condition excess concentration over 0.06 M ionic strength. observed independent dicyanobis(phenanthroline)iron(III), is, zero order third respect selected system. An overall third‐order for redox reaction. value multiplication product molar absorptivity (ɛ), path length cuvette ( b ), constant k ) deduced 1.59 × 10 6 −3 s −1 . zero‐order increased by fractional (1.5) power protons acid mM 0.1 M. ɛ⋅ k′ found 0.773 −1.5 confirms protonation triiodide acidic‐10% alcohol‐water. effect strength showed similar impact different compositions solvents 5, 10, 20% decreased increasing each medium consisting