Porphyrin-Based Multicomponent Metallacage: Host–Guest Complexation toward Photooxidation-Triggered Reversible Encapsulation and Release
Zeyuan Zhang, Lingzhi Ma, Fang Fang, Yali Hou, Chenjie Lu, Chaoqun Mu, Yafei Zhang, Haifei Liu, Ke Gao, Ming Wang, Zixi Zhang, Xiaopeng Li, Mingming Zhang
Abstract
in acetonitrile/chloroform (ν/ν = 9/1), which is among the highest values in metallacage-based host-guest complexes. Moreover, the metallacage exhibits good singlet oxygen generation capacity, which can be further used to oxidize encapsulated anthracene derivatives into anthracene endoperoxides, leading to the release of guests. By employing 10-phenyl-9-(2-phenylethynyl)anthracene whose endoperoxide can be converted back by heating as the guest, a reversible controlled release system is constructed. This study not only gives a type of porphyrin-based metallacage that shows desired host-guest interactions with PAHs but also offers a photooxidation-responsive host-guest recognition motif, which will guide future design and applications of metallacages for stimuli-responsive materials.