Investigating Solid-State Luminescent Properties of New Cadmium(II) and Lead(II) Oxamato-Based Coordination Polymers

Two novel coordination polymers were synthesized through the reaction of the Hpcpa2− ligand (H3pcpa = N-(4-carboxyphenyl)oxamic acid) with cadmium(II) and lead(II) metal ions, yielding [Cd2(Hpcpa)2(H2O)6]n⋅H2O (1) and [Pb(Hpcpa)(H2O)]n (2). Structural analysis by single-crystal X-ray diffraction rev...

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Published inJournal of the Brazilian Chemical Society Vol. 35; no. 11
Main Authors Maciel, Jhonny, Junior S. de Souza, Jackson, Valdo, Ana, Martins, Felipe, Guimarães, Freddy, de Santana, Ricardo, Maia, Lauro, Cangussu, Danielle
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 2024
Subjects
CHEMISTRY, MULTIDISCIPLINARY
coordination polymers
oxamato
luminescence
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Summary:Two novel coordination polymers were synthesized through the reaction of the Hpcpa2− ligand (H3pcpa = N-(4-carboxyphenyl)oxamic acid) with cadmium(II) and lead(II) metal ions, yielding [Cd2(Hpcpa)2(H2O)6]n⋅H2O (1) and [Pb(Hpcpa)(H2O)]n (2). Structural analysis by single-crystal X-ray diffraction revealed that 1 consists of one-dimensional zigzag polymeric chains, while 2 is a three-dimensional polymer network. Additionally, investigations of their optical properties were carried out in a comparative study involving the previously reported pcpa-based coordination polymers {[Zn(Hpcpa)(H2O)3]·0.5H2O}n and {[Gd2(Hpcpa)3(H2O)5]·H2O}n], called here as 3 and 4, respectively. Under 330 nm excitation wavelength, all compounds exhibited broad emission bands spanning from 350 to 650 nm. Particularly, 1 and 3 displayed notable external quantum yields of 15.4 and 12.8%, respectively, highlighting their potential in luminescent applications.
ISSN:0103-5053
1678-4790
1678-4790
DOI:10.21577/0103-5053.20240072