Fig 1. (IMAGE) Science China Press Caption (Left) Molecular structure of Ru-1-Ru-4. (Right) Energy diagram of triplet states of Ru-1, and L-2-L-4. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content 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.