A thiophene bridged naphthalimide–porphyrin complex with enhanced activity and stability in photocatalytic H2 evolution
文献信息
Govardhana Babu Bodedla, Geliang Tang, Jianzhang Zhao, Xunjin Zhu
More efficient intramolecular energy transfer in the naphthalimide–porphyrin complex, ZnT(p-NI)TP, is accomplished by an electron rich coplanar thiophene π-linkage compared to the analogous porphyrin ZnT(p-NI)PP bearing a less coplanar phenylene π-linker. As a result, ZnT(p-NI)TP shows enhanced light-harvesting ability, electron lifetime and photoinduced charge carrier separation compared to ZnT(p-NI)PP and this boosted electron transfer from the photoexcited porphyrin moiety to the proton reduction catalyst, consequently, resulting in a 2.9 fold higher hydrogen evolution rate (ηH2) of ZnT(p-NI)TP (4.28 mmol g−1 h−1) than ZnT(p-NI)PP (1.50 mmol g−1 h−1). ZnT(p-NI)TP is also much more photostable than ZnT(p-NI)PP and continued to show hydrogen evolution for up to 50 h.
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