作者:Vladimír Zeleňák、Eva Beňová、Miroslav Almáši、Dáša Halamová、Virginie Hornebecq、Viktor Hronský
DOI:10.1039/c8nj00267c
日期:——
thermoanalytical methods (TG/DTA) and liquid and solid-state NMR spectroscopy. The amount of released drug was monitored by HPLC chromatography at defined time intervals. The samples with pores closed by coumarin dimers were tight enough to show premature release of the drug from the sample. After light-driven pore opening, the amounts of released naproxen from coumarin modified mesoporous silica were different
将光响应性配体7-[((3-三乙氧基甲硅烷基)丙氧基]香豆素(C)接枝在介孔二氧化硅SBA-12材料的表面上。所获得的功能化支持物SBA-12_C被用作消炎药萘普生的有效光控储存/释放系统。在365 nm处用紫外线照射会诱导香豆素在表面上发生光二聚,从而形成由环丁烷环连接的二聚体,从而导致孔闭。然而,用较短波长254nm的UV光照射导致二聚体的裂解,孔的开放,并且客用药物分子可以从孔中释放。在两种类型的介质中研究了药物的释放,一种是在pH = 7的模拟体液,另一是在pH = 2的模拟胃液。制备的材料通过高分辨率透射电子显微镜(HR-TEM),氮吸附/解吸,红外光谱(FT-IR),热分析方法(TG / DTA)以及液相和固态NMR光谱进行表征。通过HPLC色谱法在规定的时间间隔监测释放的药物量。香豆素二聚体封闭孔的样品足够紧密,显示药物从样品中过早释放。在光驱动的孔打开后,香豆素改性的中孔二