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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Exploring the metallochromic behavior of pentacyanidoferrates in visual, electronic and Raman spot tests

Texto completo
Shinohara, Jorge S. [1] ; Grasseschi, Daniel [1] ; Almeida, Sabrina N. [1] ; Toma, Henrique E. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Quim, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Anais da Academia Brasileira de Ciências; v. 91, n. 2 2019.
Citações Web of Science: 0

Pentacyanidoferrate(II) complexes of aromatic N-heterocycles, such as 4-cyanopyridine, exhibit characteristic colors and strong metallochromism associated with the donor-acceptor interactions of the metal ions with the cyanide ligands. In the presence of transition metal ions insoluble polymeric complexes are formed, displaying bright yellow, red, brown and green colors with zinc(II), nickel(II), copper(II) and iron(III) ions, respectively. Such metallochromic response is better observed on filter paper, allowing applications in analytical spot tests. The effects can be explored visually and probed by means of modern instrumental facilities, including spectrophotometric and resonance Raman techniques. In this way, by using the cyanopyridinepentacyanidoferrates, the Prussian Blue test for ferric ions can be extended to the entire row of transition metal elements, providing a new and modern insight of such classical Feigl's spot tests. (AU)

Processo FAPESP: 13/24725-4 - Química supramolecular e nanotecnologia
Beneficiário:Henrique Eisi Toma
Linha de fomento: Auxílio à Pesquisa - Temático