3D Framework of CuW-EDDP (IMAGE) Tsinghua University Press Caption Each unit of the polyoxometalate (SiW12) joins with the copper (Cu4) complexes (top left) and each copper (Cu4) complex bridges the adjacent four (SiW12) units (bottom left) to create the novel 3D framework of CuW-EDDP. Credit Polyoxometalates, Tsinghua University Press Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.