| 1. |
Hidehisa Hagiwara, Motonori Watanabe, Shintaro Ida, Tatsumi Ishihara, Overall water splitting on dye-modified inorganic semiconductor photocatalysts, journal of the japan petroleum institute, 10.1627/jpi.60.10, 2017.01, A review covers the development of dye-modified inorganic semiconductor photocatalysts for water splitting reaction; the effects of dye-modification on the water splitting activity of the photocatalysts using visible light energy for solar energy conversion; the photocatalytic activities of metal oxides sulphides oxysulfides and oxynitrides enhanced by dye-modification; and the charge transfer mechanism of the dye-modified photocatalyst a two-step excitation process similar to that of photosynthesis.. |
| 2. |
Motonori Watanabe, Yuki Honda, Hidehisa Hagiwara, Tatsumi Ishihara, [FeFe]-Hydrogenase and its organic molecule mimics—Artificial and bioengineering application for hydrogenproduction, Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 10.1016/j.jphotochemrev.2017.09.001, 2017.12, This study focuses on [FeFe]-hydrogenase and its metallorganic mimics in terms of electronic and photophysical properties, which can be applied to the electrochemical and/or photochemical production of molecular hydrogen. Natural [FeFe]-hydrogenase, synthetic mimics of its active site and recent progresses in hybrid-type hydrogen production, for example, inorganic-combination photoelectrochemical and photochemical hydrogen production, are reviewed.. |
| 3. |
Motonori Watanabe, Dye-sensitized photocatalyst for effective water splitting catalyst, Science and Technology of Advanced Materials, 10.1080/14686996.2017.1375376, 2017.12, Renewable hydrogen production is a sustainable method for the development of next-generation energy technologies. Utilising solar energy and photocatalysts to split water is an ideal method to produce hydrogen. In this review, the fundamental principles and recent progress of hydrogen production by artificial photosynthesis are reviewed, focusing on hydrogen production from photocatalytic water splitting using organic–inorganic composite-based photocatalysts.. |
| 4. |
Motonori Watanabe, Kew Yu Chen, Yuan Jay Chang, Tahsin J. Chow, Acenes generated from precursors and their semiconducting properties, Accounts of Chemical Research, 10.1021/ar400002y, 2013.07, Acenes are a class of aromatic hydrocarbons composed of linearly fused benzene rings. Noteworthy features of these molecules include their extended flat structure and the narrow gap between the HOMO and LUMO energy levels. However, the preparation of larger acenes, those that are larger than pentacene, has been challenging. These molecules are relatively unstable and have low solubility in typical solvents. Recently researchers have developed a new synthesis route for higher acenes using stable and soluble "precursors, " which generate these structures on demand by either heating or irradiation of light. Using this method, nonsubstituted hexacene, heptacene, octacene, and nonacene were successfully prepared.In this Account, we summarize the preparation of nonsubstituted acenes from corresponding precursors, describe their physical properties, and discuss potential applications including potential usage in organic semiconductor devices. We first introduced the concept of using a precursor in the work with pentacene. Overall, we divide this methodology into two categories: masking pentacene itself with a dienophile to form a cycloadduct and the construction of higher acenes through conventional synthetic procedures. For the first category, a diverse array of dienophiles could be chosen, depending on the processing needs, especially for use in field-effect transistors (FETs). For the second category, researchers synthesized the pentacene precursor molecules using a multistep procedure. Upon proper activation, these molecules expel small fragments to generate pentacene readily. This strategy enabled the production of pentacene andunprepared higher acenes ranging from hexacene to nonacene. This new method provides a way to unravel the fascinating chemistry of higher acenes.. |
