▎ 摘 要
NOVELTY - Polyethyleneimine derivative (I) is new. USE - Polyethyleneimine derivative of formula (I) used as nano dual-emission fluorescent carrier for targeting tumor acid environment (claimed). DETAILED DESCRIPTION - Polyethyleneimine derivative of formula (I) is new. n is 15-20. An INDEPENDENT CLAIM is included for a method for preparing polyethyleneimine derivative of formula (I).