Binary and Ternary Metal–Organic Hybrid Polymers
in Aqueous Lead(II)–Dicarboxylic Acid–(Phen) Systems.
The Influence of O- and S‑Ligand Heteroatoms on the Assembly
of Distinct Lattice Architecture, Dimensionality, and Spectroscopic
Properties
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Abstract
Poised
to understand the influence of O- and S-heteroatoms on the
chemical reactivity of dicarboxylic acids toward Pb(II), leading to
crystalline metal–organic hybrid materials with distinct lattice
architecture, dimensionality, and spectroscopic properties, the synthesis
and physicochemical properties of binary/ternary Pb(II)–(O,S)-dicarboxylic
acid–(phenanthroline) systems was investigated in aqueous media.
pH-specific hydrothermal reactions of Pb(II) with O- and S-dicarboxylic
acid ligands and phenanthroline (phen) afforded the variable dimensionality
metal–organic Pb(II) polymers [Pb<sub>3</sub>(oda)<sub>3</sub>]<sub><i>n</i></sub> (<b>1</b>), [Pb(phen)(oda)]<sub><i>n</i></sub> (<b>2</b>), [Pb(tda)]<sub><i>n</i></sub> (<b>3</b>), and [Pb(phen)(tda)]<sub><i>n</i></sub> (<b>4</b>). The choice of O- vs S-ligands
in the aqueous systems of Pb(II) and phenanthroline is linked to the
emergence of distinct lattice composition–dimensionality (2D–3D)
changes at the binary and ternary level, bestowing spectroscopic fingerprint
identity to Pb(II) coordination and luminescence activity