[reaction: see text] Titration of porphyrin-fullerene rotaxanes with DABCO or 4,4'-bipyridine led to photo- and redoxactive catenanic architectures, which upon photoexcitation undergo a sequence of short-range energy and electron transfer events to give a long-lived charge-separated radical-pair state.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ol049540h | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Full-Spectrum Porphyrin-Fullerene D-A Supramolecular Photocatalyst with Giant Built-In Electric Field for Efficient Hydrogen Production.
Adv Mater
August 2021
Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
A full-spectrum (300-850 nm) responsive donor-acceptor (D-A) supramolecular photocatalyst tetraphenylporphinesulfonate/fullerene (TPPS/C ) is successfully constructed. The theoretical spectral efficiency of TPPS/C is as high as 70%, offering the possibility of full-solar-spectrum light harvesting. The TPPS/C performs a highly efficient photocatalytic H evolution rate of 276.
View Article and Find Full Text PDFPanchromatic light funneling through the synergy in hexabenzocoronene-(metallo)porphyrin-fullerene assemblies to realize the separation of charges.
Chem Sci
June 2020
Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nuremberg, Interdisciplinary Center for Molecular Materials (ICMM) Egerlandstraße 3 91058 Erlangen Germany
Here, we present a novel butadiyne-linked HBC-ethynyl-porphyrin dimer, which exhibits in the ground state strong absorption cross sections throughout the UV and visible ranges of the solar spectrum. In short, a unidirectional flow of excited state energy from the HBC termini to the (metallo)porphyrin focal points enables concentrating light at the latter. Control over excitonic interactions within, for example, the electron-donating porphyrin dimers was realized by complexation of bidentate ligands to set up panchromatic absorption that extends all the way into the near-infrared range.
View Article and Find Full Text PDFPorphyrin-based systems containing polyaromatic fragments: decoupling the synergistic effects in aromatic-porphyrin-fullerene systems.
RSC Adv
September 2020
GIR MIOMeT, IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid E-47011 Valladolid Spain
In this work, we report a two-step synthesis that allows the introduction of four pyrene or corannulene fragments at the position of -tetraarylporphyrins using a microwave-assisted quadruple Suzuki-Miyaura reaction. Placing the PAHs at this position, further from the porphyrin core, avoids the participation of the porphyrin core in binding with fullerenes. The fullerene hosting ability of the four new molecular receptors was investigated by NMR titrations and DFT studies.
View Article and Find Full Text PDFSupramolecular Fullerene Tetramers Concocted with Porphyrin Boxes Enable Efficient Charge Separation and Delocalization.
J Am Chem Soc
July 2020
Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea.
Herein, we report a novel porphyrin/fullerene supramolecular cocrystal using a shape-persistent zinc-metalated porphyrin box (Zn-PB) and C/C. An unprecedented arrangement of a tightly packed square-planar core of four C or C surrounded by six cube-shaped Zn-PBs was observed. This unique packing promotes strong charge transfer (CT) interactions between the two components in the ground state and formation of charge-separated states with very long lifetimes in the excited state and enables unusually high photoconductivity.
View Article and Find Full Text PDFApplication of the boron center for the design of a covalently bonded closely spaced triad of porphyrin-fullerene mediated by dipyrromethane.
Dalton Trans
May 2017
Departement de chimie, Université de Sherbrooke, Sherbrooke, QC, Canada J1K 2R1.
Two novel triads had been designed through covalent bond connection of the boron dipyrromethane (BODIPY), free base porphyrin (H2P) or zinc(ii) porphyrin (ZnP) and N-methyl-2-phenyl-3,4-fulleropyrrolidine (C) mediated by BODIPY. This closely spaced triad arrangement where porphyrin and fullerene are placed apart is anticipated to stabilize charge separation by separating the two radicals from each other. Two model polyads were synthesized with BODIPY and H2P or ZnP to investigate interaction between the two chromophores.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!