Synthesis on NIR‐II Multifunctional Imaging and Photothermal Therapy of a Novel Water‐Soluble Molecule

Abstract

AbstractThe synthesis of water‐soluble symmetric molecules with donor‐acceptor‐donor (D‐A‐D) structure is reported. The compound is connected by π bridge with 2‐bromofluorene external polyethylene glycol 2000 as the shielding unit, and donor component and pyrrolopyrrole (DPP) as the acceptor unit. The D‐A‐D double donor fluorescent molecule P2‐DPP is obtained by coupling reaction. The absorption peak and emission peak of the fluorescent molecule P2‐DPP are 600 and 1020 nm, respectively. It has potential excellent imaging characteristics. It does not need to use nanoparticles formed by the DSPE‐MPEG amphiphilic block to form micelles. The quantum yield reaches 0.6% and the penetration depth can reach 10 mm. The chemical is capable of achieving liver and renal metabolism. It has a good application prospect in the photothermal therapy of mouse tumors and realizes the integration of biological diagnosis and treatment.