Synthesis and Characterization of a Novel Luminescent Silver(I)-Chromium(III) Heterometallic Hybrid Material With a Tripodal Ligand N-(Carbamoylmethyl) Iminodiacetato Acid (H₂ADA)

Abstract

Using the tripodal N-(carbamoylmethyl)iminodiacetato acid (H₂ADA) ligand and corresponding Ag(I) and Cr(III) salts, a novel two-dimensional (2D) heterometallic Ag(I)-Cr(III) coordination polymer [AgCr(ADA)₂]_n (1) has been isolated. H₂ADA are deprotonated into ADA²⁻, which adopts a novel asymmetrical η₁, η₁, η₁, η₂, μ₅-pentadentate coordination mode to bridge neighboring seven-coordinated Ag(I) and five-coordinated Cr(III) ions forming a 2D inorganic-organic hybrid framework containing 2D Ag-O-Cr inorganic connectivity. The solid-state fluorescence spectrum of 1 was also investigated exhibiting the maximum emission peak at 609 nm while no fluorescence emission band can be observed for the free ligand. 1 also represents a luminescent heterometallic hybrid framework with scarcely reported pentacoordinated deprotonated H₂ADA ligands.

Supplemental materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Keywords:

• Ag(I)
• Cr(III)
• fluorescence
• heterometallic

Acknowledgments

This present work was supported financially by Tianjin Educational Committee (20120508).