Photodynamic inactivation of Candida albicans using bridged polysilsesquioxane films doped with porphyrin
作者:M. Gabriela Alvarez、M. Lorena Gómez、S. Jimera Mora、M. Elisa Milanesio、Edgardo N. Durantini
DOI:10.1016/j.bmc.2012.05.012
日期:2012.7
obtaining flexible thin films. Absorption and fluorescence spectroscopic analysis showed the characteristic bands of the porphyrin in the visible region indicating that the photosensitizer is mainly embedded as monomer in the films. Photodynamic properties of the polymeric films were studied in solution containing photooxidizable substrates. Singlet molecular oxygen, O2(1Δg), production was observed
通过掺杂卟啉衍生物制备了新型光敏桥联的聚倍半硅氧烷膜。该膜是通过在5-(4-羧基苯基)-10,15,20-存在下(缩水甘油氧基丙基)三甲氧基硅烷与正十二烷基胺的反应产物,通过桥联倍半硅氧烷的前体的酸催化缩聚反应而形成的。三(4-甲基苯基)卟啉,然后蒸发溶剂。该过程允许获得柔性薄膜。吸收和荧光光谱分析显示了卟啉在可见光区域的特征带,表明光敏剂主要作为单体嵌入膜中。在含有可光氧化基质的溶液中研究了聚合物薄膜的光动力学性质。单线态分子氧,O 2(1 Δ克),通过用的9,10dimethylanthracene和9,10-蒽二(亚甲基)在不同介质dimalonic酸反应生产观察。而且,这些膜对1-色氨酸的分解光敏化。体外研究表明,这些薄膜可产生白色念珠菌的光动力学失活悬浮液及其表面上的细胞。这些薄膜表现出光敏活性,在可见光照射60分钟后,导致细胞存活率下降约2.5 log(99.7%)。同样,在微