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Multifunctional Properties of a 1D Helical Co(II) Coordination Polymer: Toward Single-Ion Magnetic Behavior and Efficient Dye Degradation

[Image: see text] This contribution deals with the synthesis and utilization of a new pyrazole-based unsymmetrical ligand, 3-(3-carboxyphenyl)-1H-pyrazole-5-carboxylic acid (H(2)CPCA), for generating multifunctional materials. The reaction with the Co(II) salt in the presence of a co-ligand 2,9-dime...

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Detalles Bibliográficos
Autores principales: Roy, Manasi, Adhikary, Amit, Mondal, Amit Kumar, Mondal, Raju
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644332/
https://www.ncbi.nlm.nih.gov/pubmed/31458193
http://dx.doi.org/10.1021/acsomega.8b02212
Descripción
Sumario:[Image: see text] This contribution deals with the synthesis and utilization of a new pyrazole-based unsymmetrical ligand, 3-(3-carboxyphenyl)-1H-pyrazole-5-carboxylic acid (H(2)CPCA), for generating multifunctional materials. The reaction with the Co(II) salt in the presence of a co-ligand 2,9-dimethyl phenanthroline (dmphen) results in the formation of the helical compound {[Co(2)(dmphen)(2)(CPCA)(2)]DMF}(n) (1). However, two isostructural monomeric complexes are formed {[M(HCPCA)(2)(H(2)O)(2)], M = Co(II), (2) and Mn(II) (3)} when reactions were carried out in the absence of dmphen. Compound 1 shows some highly encouraging single-ion magnetic (SIM) properties. Detailed magnetic studies unveil slow relaxation of magnetization of compound 1, driven by the higher magnetic anisotropy of the cobalt ion, with the energy barrier of ∼9.2 K and relaxation time of 9.1 × 10(–5) s, suggesting a SIM behavior. Moreover, UV–vis and fluorescence studies confirm the selective dye degradation of compound 1 with methylene blue both in the presence and absence of H(2)O(2), with the remarkable degradation efficiency of ∼98 and ∼82%, respectively.