title: Chitosan Film Containing an Iron Complex: Synthesis and Prospects for Heterocyclic Aromatic Amines (HAAs) Recognition.
abstract: Hybrid organic-inorganic materials have been seen as a promising approach to produce sensors for the detection and/or recognition of heterocyclic aromatic amines (HAAs). This work shows the synthesis of a hybrid film as a result of the incorporation of [Fe(CN)5(NH3)]3-into chitosan (CS); CS-[(CN)5Fe(NH3)]3-. The sensitivity of CS-[(CN)5Fe(NH3)]3-toward HAA-like species was evaluated by using pyrazine (pz) as probe molecule in vapor phase by means of electrochemistry and spectroscopic techniques. The crystallinity (SEM-EDS and XRD) decrease of CS-[(CN)5Fe(NH3)]3-in comparison to CS was assigned to the disturbance of the hydrogen bond network within the polymer. Such conclusion was reinforced by the water contact angle measurements. The results presented in this work indicate physical and intermolecular interactions, mostly hydrogen bond, between [Fe(CN)5(NH3)]3-and CS, where the complex is likely trapped in the polymer with its sixth coordination site available for substitution reactions.
authors.affiliation: Departamento de Quı́mica Orgânica e Inorgânica, Universidade Federal do Ceará , Cx. Postal 6021, 60455-760 Fortaleza, Ceará, Brazil.
authors.forename: Maria Aparecida S
authors.initials: MA
authors.lastname: da Silva
authors.affiliation: Departamento de Quı́mica Orgânica e Inorgânica, Universidade Federal do Ceará , Cx. Postal 6021, 60455-760 Fortaleza, Ceará, Brazil.
authors.forename: Dieric S
authors.initials: DS
authors.lastname: Abreu
authors.affiliation: Departamento de Quı́mica Orgânica e Inorgânica, Universidade Federal do Ceará , Cx. Postal 6021, 60455-760 Fortaleza, Ceará, Brazil.
authors.forename: Leandro A
authors.initials: LA
authors.lastname: Costa
authors.affiliation: Departamento de Quı́mica Orgânica e Inorgânica, Universidade Federal do Ceará , Cx. Postal 6021, 60455-760 Fortaleza, Ceará, Brazil.
authors.forename: Natanna de A
authors.initials: NA
authors.lastname: Aguiar
authors.affiliation: Departamento de Quı́mica Orgânica e Inorgânica, Universidade Federal do Ceará , Cx. Postal 6021, 60455-760 Fortaleza, Ceará, Brazil.
authors.forename: Tércio F
authors.initials: TF
authors.lastname: Paulo
authors.affiliation: Departamento de Quı́mica Analı́tica e Fı́sico-Quı́mica, Universidade Federal do Ceará , 60440-900 Fortaleza, Ceará, Brazil.
authors.forename: Elisane
authors.initials: E
authors.lastname: Longhinotti
authors.affiliation: Departamento de Quı́mica Orgânica e Inorgânica, Universidade Federal do Ceará , Cx. Postal 6021, 60455-760 Fortaleza, Ceará, Brazil.
authors.forename: Izaura C N
authors.identifier: http://orcid.org/0000-0002-2765-4982
authors.initials: IC
authors.lastname: Diógenes
mesh_terms: D000588:Amines / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000588:Amines; D006571:Heterocyclic Compounds; D011108:Polymers; D048271:Chitosan; D007501:Iron
keywords: chitosan; coordination compound; heterocyclic aromatic amines; hybrid materials; pyrazine