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接受者-捐赠者-接受者类型的分子具有很大的静电电位差,用于有效的NIR光热疗法.

Kexin Fan1, Ludan Zhang2, Qinqiu Zhong2

  • 1State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering Beijing University of Chemical Technology, Beijing 100029, China. xubowei@buct.edu.cn.

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概括

接受者-捐赠者-接受者 (A-D-A) 小分子在创造近红外吸收光热剂方面优于聚合物. Y6纳米粒子在光热疗法中表现出高效率,有效地杀死癌细胞.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 生物医学工程 生物医学工程

背景情况:

  • 接受器-捐赠器-接受器 (A-D-A) 分子对近红外 (NIR) 吸收光热剂 (PTA) 是有前途的.
  • 静电电位 (ESP) 分布对用于光热疗法 (PTT) 的AD-A光敏剂的影响尚未得到充分研究.
  • 优化分子设计对于提高PTA性能至关重要.

研究的目的:

  • 为了比较A-D-A小分子中的ESP分布与NIR PTA开发中的聚合物.
  • 研究ESP对光学性能和光热转换效率 (PCE) 的影响.
  • 评估基于AD-A的新型纳米颗粒的PTT疗效.

主要方法:

  • 密度函数理论 (DFT) 计算来分析ESP分布.
  • A-D-A型小分子和聚合物纳米粒子 (NP) 的合成和表征.
  • 光学属性测量 (灭绝系数,吸收光谱) 和PCE的确定.
  • 使用4T1癌细胞进行PTT疗效的体外评估.

主要成果:

  • 与聚合物相比,DFT计算显示了AD-DA小分子中的ESP差异更大,促进了更紧密的包装和更强的NIR吸收.
  • Y6纳米颗粒呈现出显著的人色转移到822nm,并将NIR-II发射扩展到1400nm.
  • Y6 NPs实现了高的灭绝系数 (5.69 L g-1 cm-1) 和PCE (66.3%).
  • Y6 NPs在体外显示出强大的PTT,达到93.4%的癌细胞死亡率.

结论:

  • A-D-A小分子为设计高性能NIR PTA提供了卓越的ESP分布.
  • Y6纳米粒子是用于NIR吸收PTA和PTT应用的高效材料.
  • 这些发现为开发用于癌症治疗的先进光敏剂提供了宝贵的见解.