Syntheses, crystal structures and photochemistry of two new organic–inorganic hybrid compounds based on copper–glycin complexes and paradodecatungstates

Abstract

Two organic–inorganic hybrid materials built from copper–glycin complexes and paradodecatungstates, Na₆[{Cu(gly)(H₂O)}]₂[{Cu(H₂O)}(H₂W₁₂O₄₂)] ⋅ 21H₂O (1) and Na{Na(H₂O)₆}{Na(H₂O)₄}₃[{Cu(gly)₂}]₂{H₅(H₂W₁₂O₄₂)} ⋅ 8.5H₂O (gly = glycin) (2), have been synthesized in aqueous solution and characterized by IR, UV, TG, elemental analysis, electrochemistry, and single-crystal X-ray analyses. In 1, [H₂W₁₂O₄₂]¹⁰⁻ building block connects two neighboring clusters with [Cu(H₂O)]²⁺ groups to produce an infinite 1-D chain; then these chains are linked through [Cu(gly)(H₂O)]⁺ groups to form a 2-D layer structure, which is further joined by Na⁺ to form a 3-D network. In 2, [H₂W₁₂O₄₂]¹⁰⁻ decorated by two [Cu(gly)₂] moieties connects four adjacent clusters with six Na⁺ into a 2-D layer. In addition, luminescence and photocatalysis properties of these compounds have been investigated.

Keywords:

• Paradodecatungstates
• Copper–glycin complexes
• 3-D framework
• Luminescent property
• Photocatalysis property

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 20701005/20701006), the Science and Technology Development Project Foundation of Jilin Province (No. 20060420), the Postdoctoral station Foundation of Ministry of Education (No. 20060200002), the Testing Foundation of Northeast Normal University, and the Program for Changjiang Scholars and Innovative Research Team in University.