Preparation and Characterization of a Coordination Polymer Based on Iron (III)-Cyamelurate as a Superior Catalyst for Heterogeneous Fenton-Like Processes

Wanessa Lima de Oliveira; Eduarda Ferreira de Oliveira; Taís Dos Santos da Cruz; Walker Vinícius Ferreira do Carmo Batista; Carlos Moraes; Fabiano Vargas Pereira; Moacir Rossi Forim; Gabriel Ali Atta Diab; Ivo Freitas Teixeira; Marcio Cesar Pereira; João Paulo de Mesquita

doi:10.1021/acs.langmuir.2c03496

Preparation and Characterization of a Coordination Polymer Based on Iron (III)-Cyamelurate as a Superior Catalyst for Heterogeneous Fenton-Like Processes

Langmuir. 2023 Apr 11;39(14):5002-5011. doi: 10.1021/acs.langmuir.2c03496. Epub 2023 Mar 29.

Affiliations

¹ Department of Chemistry, Federal University of Jequitinhonha and Mucuri Valleys, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG CEP 39100-000, Brazil.
² Department of Chemistry, Federal University of São Carlos. Rod. Washington Luís km 235 - SP-310, São Carlos, SP CEP 13565-905, Brazil.
³ Department of Chemistry, Federal University of Minas Gerais. Av. Antônio Carlos, 6627 - Pampulha - Belo Horizonte, MG CEP 31270-901, Brazil.
⁴ Instituto de Ciência, Engenharia e Tecnologia, Federal University of Jequitinhonha and Mucuri Valleys, Rua do Cruzeiro, n° 01, Bairro Jardim São Paulo, Teófilo Otoni, MG CEP 39803-371, Brazil.

PMID: 36989403
DOI: 10.1021/acs.langmuir.2c03496

Abstract

We report on a new iron (iii)-cyamelurate-based coordination polymer. The new material based on a heptazine derivative was prepared in aqueous medium and characterized by a variety of techniques including TGA, FTIR, XRD, HRTEM, and STEM. Due to the high structural stability of the complex in aqueous media, its heterogeneous Fenton-like catalytic activity was evaluated using a model molecule. The results obtained showed a high catalytic activity in both in basic and acid media. The pseudo-first-order rate constants normalized by iron(III) concentrations was approximately 1000 times higher than the result obtained for traditional heterogeneous catalysts based on iron(III) oxyhydroxides. The best observed catalytic activities were attributed to the increase in the binding sites of Fe³⁺ ions, in parallel with the increased exposure of the catalytic sites, leading to a higher atomic efficiency of the reaction.