The invention discloses
graphene quantum dots used for targeting
nuclear imaging and mitochondrial imaging. According to the invention, polyethyleneimine (PEI) and 1,3,6-trinitropyrene are subjected to a reaction under
hydrothermal reaction conditions so as to form PEI-modified
graphene quantum dots (GQDs-PEI) used for nuclear targeting imaging. Based on the constructed GQDs-PEI, 4-carboxybutyltriphenylphosphonium
bromide (TPP) is grafted onto the surfaces of GQDs-PEI by an amidation reaction so as to construct GQDs-TPP used for
mitochondrial targeting imaging. The invention provides preparation methods and application of GQDs-PEI and GQDs-TPP. The invention has the following beneficial effects:
nanotechnology is used for preparing the GQDs-PEI and the GQDs-TPP which are respectively usedfor nuclear targeting imaging and
mitochondrial targeting imaging; the preparation methods are simple in process, free of special equipment requirements, friendly to environment, low in cost and capable of realizing large-scale preparation; and the GQDs-PEI and GQDs-TPP of the invention have good
biocompatibility and optical properties, and can realize specific targeting imaging of
cell nucleusesand mitochondria.