▎ 摘　　要

NOVELTY - Electro-chemical luminescent material comprises graphene quantum dots, connecting chain and bipyridine ruthenium compound. The connecting chain is covalently bonded to graphene quantum dot and bipyridine ruthenium compound. USE - The electro-chemical luminescent material is useful in detection of trace targets of pentachlorophenol, polypeptide, thrombin or tumor marker (claimed). ADVANTAGE - The electro-chemical luminescent material: has stronger electro-chemiluminescence signal; improves detection accuracy; and is suitable for detection of trace targets. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing electro-chemical luminescent material, comprising covalently bonding graphene quantum dots and bipyridine ruthenium compounds through a connecting chain.