Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo, Japan.
Langmuir. 2013 Apr 23;29(16):5060-5. doi: 10.1021/la4003737. Epub 2013 Apr 9.
Cationic porphyrin was successfully intercalated into transparent clay membrane by developing the new strategy for the sample preparation conditions. When water:ethanol = 1:2 (v:v) was used as solvent for porphyrin penetration process, high density intercalation of porphyrin into the clay membrane was achieved. In the interlayer space, porphyrin molecules do not aggregate owing to intercharge distance matching effect (size-matching effect), even at high density condition. Judging from XRD and absorption measurements, the orientations of the porphyrins in the clay layers should be almost parallel to the clay nanosheet as monolayer. Because the fluorescence quantum yield did not depend on its loading level, it is turned out that intercalated TMPyP in the clay film keeps the photoactivity even under the high density conditions.
通过开发新的样品制备条件策略，成功地将阳离子卟啉插入透明粘土膜中。当水：乙醇= 1：2（v：v）用作卟啉渗透过程的溶剂时，实现了卟啉高密度插入粘土膜中。在层间空间中，由于内电荷距离匹配效应（尺寸匹配效应），卟啉分子不会聚集，即使在高密度条件下也是如此。从 XRD 和吸收测量判断，卟啉在粘土层中的取向应该几乎与粘土纳米片平行，呈单层排列。由于荧光量子产率不取决于其负载水平，因此可以得出结论，即使在高密度条件下，插层在粘土膜中的 TMPyP 仍保持光活性。
