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锌掺杂卟啉衍生物的制备及其光动力性能研究
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摘要
光动力治疗是一种结合光、光敏剂、氧气于一体的非入侵式的癌症治疗手段。卟啉类衍生物是一种性能优越的光敏剂。以卟啉为母体,制备了一种新型锌卟啉。通过核磁共振谱和高分辨率质谱确定卟啉衍生物的结构。在光催化降解1,5-二羟基奈的测试中,锌卟啉的催化效果明显优于其他卟啉衍生物(约为卟啉的1.4倍)。以1,3-二苯基异苯并吡喃为捕获剂,测试了其单线态氧量子产率。结果表明,锌卟啉的单线态氧量子产率为1.02,明显高于四苯基卟啉的单线态氧量子产率(0.62)。为了探究其作用机理,测试了卟啉衍生物的ESR光谱。结果显示,锌卟啉在光催化过程中存在一价锌和二价锌之间的相互转换,进一步提高了锌卟啉的能量传递能力,从而提升了其光催化性能。
Photodynamic therapy(PDT) is a promising noninvasive approach for the treatment of multifarious cancer tumors by combining photosensitizers, oxygen molecule and light at a suit. Herein, Zn-porphyrin were prepared by heating reflux in N2. The structure of porphyrin derivatives are confirmed by high-resolution mass spectrometer and NMR. The reaction rate of Zn- porphyrin in the photooxidation reaction of 1,5-dihydroxynaphthalene is 1.4 times than undoped porphyrin. Singlet oxygen quantum yield was study by recording the decrease of diphenylisobenzofuran(DPBF). The singlet oxygen quantum yield of Zn-porphyrin is 1.02 which is higher than porphyrin(0.62). ESR was used to study the functional mechanism of Zn-4CN-TPP. It turned out that there is an interconversion between Zn~+ and Zn_(2+) in the process of photocatalysis. In addition, introducing of cyano-group ehchance the electronic transmission ability, resulting in a high PDT performance.
引文
[1]Dolmans,D.E.J.G.J.;Fukumura,D.;Jain,R.K.Nat.Re V.Cancer 2003,3,380.
    [2]Ogilby,P.R.Chem.Soc.Rev.2010,39,3181-3209

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