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This research was funded by grant TED2021-129876B-I00 of the Ministerio de Ciencia, Innovacion y Universidades (Spain).

Analysis of institutional authors

González Calatayud, DavidAuthorMendiola, M AAuthorLopez-Torres, ElenaCorresponding Author

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Unsymmetrical Bis(thiosemicarbazone) Ligands and Their Nickel(II) Complexes: Synthesis, Characterization and Photocatalytic Activity

Publicated to:Inorganics. 13 (2): 40- - 2025-02-01 13(2), DOI: 10.3390/inorganics13020040

Authors: Buron, Rodrigo; Calatayud, David G; Mendiola, M A; Lopez-Torres, Elena

Affiliations

Univ Autonoma Madrid, Dept Quim Inorgan, Madrid 28049, Spain - Author

Abstract

The widespread use of organic dyes in industrial processes has led to a considerable release of these compounds into water systems, making the removal of organic contaminants from freshwater a pressing challenge. Photocatalysis, particularly through coordination compounds, presents a promising solution to this problem. In this study, we report the synthesis and characterization of three novel dissymmetric bis(thiosemicarbazone) ligands and their corresponding nickel(II) complexes, which have been extensively analyzed using various techniques. We evaluated the photocatalytic degradation of methyl orange by these nickel complexes, with results demonstrating that they exhibit superior efficiency compared to previously reported nickel-based complexes. Theoretical calculations reveal a correlation between the HOMO-LUMO energy gap and the energies of the involved orbitals. Additionally, with the growing demand for sustainable fuels that do not contribute to greenhouse gas emissions, molecular hydrogen stands out as a promising candidate. Given the potential of bis(thiosemicarbazone) complexes for electrocatalytic hydrogen evolution, we performed preliminary experiments to assess the ability of these nickel complexes to function as photocatalysts for water splitting. The results show that the three nickel complexes successfully generate hydrogen under the tested conditions, although further optimization is necessary to improve hydrogen production efficiency.

Keywords

Azo dyesDegradationElectrocatalysisHeHerHydrogen evolutionNickelThiosemicarbazonesWate

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Inorganics due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2025, it was in position 16/44, thus managing to position itself as a Q2 (Segundo Cuartil), in the category Chemistry, Inorganic & Nuclear. Notably, the journal is positioned en el Cuartil Q2 para la agencia Scopus (SJR) en la categoría Inorganic Chemistry.

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-15:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 1 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

    It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

    • The work has been submitted to a journal whose editorial policy allows open Open Access publication.

    Leadership analysis of institutional authors

    There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (Buron, Rodrigo) and Last Author (LOPEZ TORRES, ELENA SOFIA).

    the author responsible for correspondence tasks has been LOPEZ TORRES, ELENA SOFIA.