English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Ion pair charge transfer (IPCT) reaction has been studied on the reduction of Co III centre in coordination compounds with reference to solvent medium and structure of the complex. A series of Co III (L) 3 3+ (L = (NH 3)2, en, pn, tn and bn) were prepared, characterized and the structures of the complexes were refined using powder XRD data. Co III (L) 3 3+ crystallizes in distorted monoclinic system with  = 92.93 (1)° to 113.00 (2)°. A combination of powder XRD and cyclic voltammetric technique is shown to be methodologically important and complementary for the understanding of reduction property of Co III centre. The voltammetric measurements of Co III (L)3 3+ have shown one irreversible Co(III)  Co(II) reduction of metal centre and the peak positions of the complexes are localized due to strained ligand. Quantum yield for 254 nm excitation of Co III (L) 3 3+ (L = (NH 3)2, en, pn, tn and bn) in water-1,4-dioxane mixtures (Diox = 0, 5, 10, 15, 20, 25 and 30% (v/v)) were also derived for all the complexes in presence of added iodide ion, in which Co III is reduced via {Co III L3 3+ , I - } ion-pair formation. The photoactive state is ion-pair charge transfer transition state and the quantum efficiency is solvent dependent. That is, Co(II) in water Diox (100:0 (v/v)) is less than that in water Diox (70:30 (v/v)). That is, change inCo(II) is consistent with observed increase in x Diox of the medium. An elaboration on binary solvent modifiedCo(II) in terms of correlation relationships using solvent empirical parametersr, Y, E T N , DN N , ,  and * provides a model to understand solvent medium participation. Application of this method involving model equation of the form Y S = Y 0 +  n i=1 aiXi helps the binary solvent effect on {Co III (L) 3 3+ , I - } ion pair into Co II product formation efficiency. The photoreduction proceeds through long-range and short range solvation mechanisms. Regression methods were attempted to quantify the solvation effect.

chemical science transactions

Modeling Analysis of the Photoreduction of Cobalt(III) Speciation via (CoIII-I-) Ion Pair Formation in Water-1,4-Dioxane Mixtures with XRPD and Voltammetric Studies