▎ 摘　　要

NOVELTY - Rare earth complex/graphene oxide fluorescent material i.e. graphene complex (I) is new. USE - (I) is useful in biological labeling and cell imaging (claimed). ADVANTAGE - The method: solves the phase separation phenomenon between the graphene oxide and the europium complex in the doping method; and has excellent conjugation and co-planarity, and small steric hindrance, which can makes the excited state of rare earth complexes require lower energy; increases the number of molecules in the excited state, and thus improves the fluorescence properties of graphene oxide. DETAILED DESCRIPTION - Rare earth complex/graphene oxide fluorescent material i.e. graphene complex of formula (I) is new. M = rare earth element including yttrium, europium, gadolinium, lanthanum, cerium, terbium, or ytterbium; and R1 and R2 = 2-6C alkene group or optionally substituted phenyl group. An INDEPENDENT CLAIM is also included for preparation of (I).