Reasonable design of NIR AIEgens for fluorescence imaging and effective photothermal/photodynamic cancer therapy.
Hongsen WangYu WangZhaohui ZhengFang YangXiaobin DingAiguo WuPublished in: Journal of materials chemistry. B (2022)
The development of a multifunctional single molecule phototherapeutic agent with excellent fluorescence imaging, photothermal therapy and photodynamic therapy at the same time is still a challenging task, which mainly arises from the low absorbance of the molecule, and the complexity of energy dissipation and molecular design. Herein, four donor-acceptor (D-A) compounds were synthesized by linking triphenylamine (TPA), thiophene/thieno[3,2- b ]thiophene and different cyano acceptor structures. In this design, we propose a molecular design strategy to redshift absorption and increase the molar extinction coefficient ( ε ) by enhancing electron-withdrawing acceptors and enlarging the π-conjugation plane unit. Due to the twisted structure of TPA, these compounds exhibit aggregation-induced emission (AIE) characteristics. Notably, these AIEgens have long emission wavelengths, excellent photostability, biocompatibility, photothermal stability and singlet oxygen ( 1 O 2 ) generation performance. Among them, the photothermal conversion efficiency of a compound (named TCF-SS-TPA NPs) can reach 84.5%. Cellular internalization and therapy showed that TCF-SS-TPA NPs have good biocompatibility, excellent cell bioimaging and cancer phototherapy capabilities in vitro . This study will stimulate the molecular design of multifunctional phototherapeutics to realize effective synergistic cancer therapy.
Keyphrases
- cancer therapy
- fluorescence imaging
- photodynamic therapy
- drug delivery
- single molecule
- living cells
- fluorescent probe
- drug release
- magnetic resonance
- high resolution
- papillary thyroid
- mass spectrometry
- squamous cell carcinoma
- magnetic resonance imaging
- computed tomography
- bone marrow
- solid state
- cell therapy
- young adults
- smoking cessation
- energy transfer
- diffusion weighted imaging
- contrast enhanced
- squamous cell
- quantum dots