2026-04-17T01:37:38Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1543862025-12-04T21:45:01Zcom_2072_1057col_2072_478917col_2072_478933
RECERCAT
author
Dogaheh, Samira Gholizadeh
author
Khanmohammadi, Hamid
author
Sañudo Zotes, Eva Carolina
2020-03-30T09:49:13Z2020-03-30T09:49:13Z2017-05-152020-03-30T09:49:13Z
Two new azo-azomethine receptors, H2L1 and H2L2, containing hydrazine, naphthalene and different electron withdrawing groups, Cl and NO2, have been designed and synthesized for qualitative and quantitative detection of Cu2+ and Co2+ in aqueous media. The crystal structure of H2L1 is reported. The H2L1 was used as a chemosensor for selective detection of trace amount of Cu2+ in aqueous media. H2L2 was also applied to naked-eye distinction of Cu2+ and Co2+ from other transition metal ions in aqueous media. Detection limit of Cu2+ is 1.13 mu M and 1.26 mu M, in water, for H2L1 and H2L2, respectively, which are lower than the World Health Organization (WHO) recommended level. The binuclear Cu2+ and Co2+ complexes of the receptors have been also prepared and characterized using spectroscopic methods and MALDI-TOF mass analysis. Furthermore, the binding stoichiometry between the receptors upon the addition Cu2+ and Co2+ has been investigated using Job's plot. Moreover, the fluorescence emission spectra of the receptors and their metal complexes are also reported. (C) 2017 Elsevier B.V. All rights reserved.
cc-by-nc-nd (c) Elsevier B.V., 2017 http://creativecommons.org/licenses/by-nc-nd/3.0/es info:eu-repo/semantics/openAccess
Fluorescència
Ions metàl·lics
Estructura cristal·lina (Sòlids)
Fluorescence
Metal ions
Layer structure (Solids)
Selective detection of Cu2+ and Co2+ in aqueous media: asymmetric chemosensors, crystal structure and spectroscopic studies
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion