Tahara Yoshinori, Hirade Yugo, Arakawa Kyosuke, Shimada Tetsuya, Ishida Tamao, Tachibana Hiroshi, Takagi Shinsuke
Department of Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, Hachiohji, Tokyo 192-0397, Japan.
Advanced Collaborative Research Organization for Smart Society (ACROSS), Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
Molecules. 2024 Aug 7;29(16):3738. doi: 10.3390/molecules29163738.
The photodecomposition behavior of cationic porphyrin ZnTMAP (zinc tetrakis-(,,-trimethylanilinium-4-yl) porphyrin) in water and complexed with clay nanosheets was investigated by light irradiation to the Soret band of ZnTMAP. The decomposition of ZnTMAP was observed by UV-visible absorption spectroscopy. While the decomposition quantum yield () was 3.4 × 10 in water, that was 9.4 × 10 on the exfoliated clay nanosheets. It was revealed that the photostability of ZnTMAP was stabilized by the complex formation with clay. When ZnTMAP was intercalated between the stacked clay nanosheets, was further decreased to 4.9 × 10. The photostability increased by 361 times and 693 times for the exfoliated and stacked state, respectively. These results indicate that the flat clay surface has the potential to control intra- and intermolecular photochemical reactions.
通过对阳离子卟啉ZnTMAP（四（4 - 三甲基苯胺基）锌卟啉）的Soret带进行光照，研究了其在水中以及与粘土纳米片复合时的光分解行为。通过紫外可见吸收光谱观察ZnTMAP的分解情况。在水中，ZnTMAP的分解量子产率（）为3.4×10，而在剥离的粘土纳米片上则为9.4×10。结果表明，ZnTMAP与粘土形成络合物后光稳定性得到增强。当ZnTMAP插层到堆叠的粘土纳米片之间时，进一步降至4.9×10。对于剥离态和堆叠态，光稳定性分别提高了361倍和693倍。这些结果表明，平坦的粘土表面具有控制分子内和分子间光化学反应的潜力。
