Photoinduced Processes of Supramolecular Nanoarrays Composed of Porphyrin and Benzo[ghi]perylenetriimide Units through Triple Hydrogen Bonds with One‐Dimensional Columnar Phases
作者： Hayato Sakai , Kei Ohkubo , Shunichi Fukuzumi , Taku Hasobe
关键词: Supramolecular chemistry 、 Acceptor 、 Electron donor 、 Supramolecular assembly 、 Photochemistry 、 Chemistry 、 Hydrogen bond 、 Porphyrin 、 Electron acceptor 、 Photoinduced electron transfer
摘要: One-dimensional supramolecular columnar phases composed of porphyrins (electron donor: D) and benzo[ghi]perylenetriimides acceptor: A) through triple hydrogen bonds have been successfully constructed to perform sequential light-harvesting electron-transfer processes. A series benzo[ghi]peryleneimide derivatives synthesized examine the substituent effects such as imide nitrile groups on spectroscopic electrochemical properties. Then, formation 1:1 complex between zinc porphyrin benzo[ghi]perylenetriimide was confirmed by Job's plot (1) H NMR titration. Next, one-dimensional nanoarrays were prepared in a mixed solvent. X-ray diffraction (XRD) measurement suggested that these contained stacked donor acceptor layers. Finally, femtosecond transient absorption electron spin resonance (ESR) measurements clearly indicated photoinduced transfer occurred via singlet excited states columns.
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