Article
Chemistry, Multidisciplinary
Yong-Min Lee, Wonwoo Nam, Shunichi Fukuzumi
Summary: This perspective article discusses the redox catalysis of organic and inorganic molecules via photoinduced electron transfer, which is highly relevant for various important photoredox reactions. The combination of organic and inorganic photoredox catalysis with thermal transition metal redox catalysis enables overall photocatalytic redox reactions that would not be feasible otherwise. The article also examines the role of excited states of electron donors and acceptors in the photoinduced electron-transfer reactions, providing valuable insights for employing redox catalysts via photoinduced electron transfer.
Article
Chemistry, Physical
C. Felipe Garibello, Alexandr N. Simonov, Daniel S. Eldridge, Francois Malherbe, Rosalie K. Hocking
Summary: This study investigated the relationship between direct reduction and catalytic reduction of iron sulfides. It was found that amorphous iron sulfide showed the highest selectivity, acting as both a direct reductant and a catalyst.
Article
Multidisciplinary Sciences
Jun Choi, Kyungkon Kim, Sung-Jin Kim
Summary: Luminescent solar concentrators (LSCs) are solar light-harvesting devices that focus light on photovoltaic cells to generate electricity. Research has shown that using zinc-doped quantum dots as energy transferring donors can significantly improve the performance of LSCs.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Hajar Baguia, Jerome Beaudelot, Cecile Moucheron, Gwilherm Evano
Summary: An efficient and general process for the direct perfluoroalkylation of C-H bonds in heteroarenes using copper catalysis has been reported. The reaction is photoinduced and operates at room temperature, making it a redox neutral process.
CHEMICAL COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Yong Gao, Jianwen Qiu, Meng Liu, Xinyi Xiong, Hu Zhu
Summary: Viscosity is closely related to functional disorders and diseases. However, guidelines for designing viscosity probes with rigid fluorophores based on PET are still lacking. By synthesizing phenyl substituted rhodols with different energy gaps, a guideline for designing PET-based viscosity probes was established. This guideline demonstrated that probes with Delta E < 0.6 eV exhibited good performances such as low fluorescence background, significant fluorescence turn-on ratios, and high viscosity sensitivity. The guideline was successfully applied to design a NIR-viscosity probe and investigate the correlation between mitochondrial pH and viscosity in living cells using probe 4-NO2-RHO.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yusuke Kinoshita, Nagisa Deromachi, Takashi Kajiwara, Take-aki Koizumi, Susumu Kitagawa, Hitoshi Tamiaki, Koji Tanaka
Summary: The catalytic organic-hydride transfer to CO2 was achieved through the photoinduced two-electron reduction of the [Ru(bpy)(2)(pbn)](2+)/[Ru(bpy)(2)(pbnHH)](2+) redox couple in the presence of 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH). The active species for the catalytic hydride transfer to carbon dioxide giving formate is [Ru(bpy)(bpy.(-))(pbnHH)](+) formed by one-electron reduction of [Ru(bpy)(2)(pbnHH)](2+) with BI.
Article
Chemistry, Physical
Christine Curiac, Ethan C. Lambert, Leigh Anna Hunt, Mallory Roberts, Ainsley Lamore, Adithya Peddapuram, Hammad Cheema, Nathan I. Hammer, Jared H. Delcamp
Summary: This study aims to limit unproductive back electron transfer by lowering the electronic coupling of the donor and acceptor in the charge-separated excited state through the use of sterics. It was discovered that a novel dye with one methyl group in the donor region connected to the acceptor could lower back electron transfer rates by 22x compared to the control dye with no methyl groups.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Thomas P. Fay, David T. Limmer
Summary: A mechanism is proposed to generate spin-polarization dynamically in chiral molecular systems during photoinduced electron transfer. This mechanism explains how spin-polarization emerges in systems with incoherent hopping for charge transport, mediated by spin-orbit and electronic exchange couplings. The theory predicts nonmonotonic temperature dependence of spin-polarization, independent of spin-orbit coupling magnitude.
Article
Multidisciplinary Sciences
Nicholas Pearce, Katherine E. A. Reynolds, Surajit Kayal, Xue Z. Sun, E. Stephen Davies, Ferdinando Malagreca, Christian J. Schuermann, Sho Ito, Akihito Yamano, Stephen P. Argent, Michael W. George, Neil R. Champness
Summary: This study demonstrates the ability to control photoinduced charge transfer within homo- and hetero-rotaxanes through the organization of the components of mechanically interlocked molecules, introducing alternative pathways for electron donation.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Stanislav Zalis, Jan Heyda, Filip Sebesta, Jay R. Winkler, Harry B. Gray, Antonin Vlcek
Summary: The study elucidates the mechanism of charge transport over long distances through hole hopping via tryptophan/tyrosine chains, with experimental and theoretical analyses revealing key factors influencing the process. Experimental kinetics investigations demonstrated the acceleration effect of closely spaced tryptophans on long-range electron transfer, while theoretical calculations identified crossings between sensitizer-localized and charge-separated states in excited-state trajectories.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Micaela K. Homer, Ding-Yuan Kuo, Florence Y. Dou, Brandi M. Cossairt
Summary: This work demonstrates the importance of measuring and modulating charge-transfer processes at quantum dot interfaces, particularly for developing quantum dots as photocatalysts. Cyclic voltammetry under illumination is shown to be an effective method for measuring the rate of photoinduced charge transfer from CdS quantum dots, and the presence of long-lived charge donor states and a positive correlation between driving force and rate of charge transfer are observed. The observed rates for photoinduced charge transfer are distinct from those measured by conventional transient optical spectroscopy methods, and are more closely related to the quantum yield of light-mediated chemical transformations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Xiaowei Wang, Wei Tang, Kian Ping Loh
Summary: By molecular engineering of aqueous irreversible triphenylamine (TPA), a reversible two-electron transfer system based on an enol/keto redox couple with high kinetic rate constant was obtained. This system can achieve high working voltage and good cycling performance in aqueous RFBs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Lu Yang, Nuan Song, Daopeng Zhang, Suna Wang, Zhen Zhou
Summary: Accurate matching of active sites is crucial for the selective recognition and binding abilities of molecules. A metal-organic cage with secondary amino groups was designed, which exhibited selective recognition of different nucleosides. Additionally, accurate matching enabled the cage to strongly bind an organic dye, facilitating photoinduced electron transfer.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Matan M. Meirovich, Oren Bachar, Ramesh Nandi, Nadav Amdursky, Omer Yehezkeli
Summary: Efforts have been made to understand the interaction between semiconductor nanoparticles and nitrogenase enzyme for photoinduced biocatalytic activity. Two variants of nitrogenase were studied, with one not enhancing hydrogen generation amounts, but 2.3 nm-sized CdSe NPs showed an eightfold increase in activity compared to larger NPs. Techniques like electrochemical analysis and spectroscopic measurements were used to confirm the results.
Article
Chemistry, Physical
O. A. Stasyuk, A. A. Voityuk, M. Sola, A. J. Stasyuk
Summary: This study reports the properties of gamma-graphynes and their non-covalent complexes, as well as the process of photoinduced electron transfer. These findings are important for the development of carbon materials for photovoltaic applications.
