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26,069 Newest Publications about the topic hydrogen

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Atomic hydrogen interactions with gas-phase coronene cations: hydrogenation versus fragmentation

03-Jul-2018 | Mathias Rapacioli; Stéphanie Cazaux; Nolan Foley; Aude Simon; Ronnie Hoekstra; Thomas Schlathölter, Physical Chemistry Chemical Physics, 2018

Sequential hydrogenation of polycyclic aromatic hydrocarbon (PAH) cations drives a gradual transition from a planar to a puckered geometry and from an aromatic to an aliphatic electronic structure. The resulting H-induced weakening of the molecular structure together with the exothermic nature of ...

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On the gas-phase formation of the HCO− anion: Ac- curate quantum study of the H−+CO radiative associ- ation and HCO radiative electron attachment

03-Jul-2018 | Thierry Stoecklin; Philippe Halvick; Miguel del Jesus Lara-Moreno; Tarek Trabelsi; Majdi Hochlaf, Faraday Discussions, 2018

The hydrogen anion has never been observed in the interstellar medium, but it is most likely present in some interstellar regions. Since a direct detection appears especially difficult, im- proving the knowledge of the astrochemical processes involving this anion should be valuable in defining a ...

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Drastic rearrangement of self-assembled hydrogen-bonded tapes in a molecular crystal

03-Jul-2018 | Masaki Donoshita; Mikihiro Hayashi; Ryuichi Ikeda; Yukihiro Yoshida; Shota Morikawa; Kunihisa Sugimoto; Hiroshi Kitagawa, Chemical Communication, 2018

A 2 : 1 hydrogen-bonded crystal of 2-pyrrolidone and chloranilic acid shows structural phase transitions accompanied by the drastic rearrangement of hydrogen-bonded tapes. Such a phenomenon is attributed to the selective and directional character of hydrogen bonds.

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Hydrogen-bonded organic frameworks: design, structures and potential applications

03-Jul-2018 | Jie Luo; Jia-Wei Wang; Ji-Hong Zhang; Shan Lai; Di-Chang Zhong, CrystEngComm, 2018

Hydrogen-bonded organic frameworks (HOFs), a new type of porous material following the metal-organic frameworks (MOFs), covalent organic frameworks (COFs), etc., have emerged as one of the promising candidates in diverse potential applications. In this highlight, we summarize the key progress of ...

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In situ atomic-scale observation of inhomogeneous oxide reduction

03-Jul-2018 | Xiaobo Chen; Dongxiang Wu; Lianfeng Zou; Qiyue Yin; Hanlei Zhang; Dmitri N. Zakharov; Eric A. Stach; Guangwen Zhou, Chemical Communication, 2018

We report in situ atomic-scale transmission electron microscopy observations of the surface dynamics during Cu2O reduction. We show inhomogeneous oxide reduction caused by the preferential adsorption of hydrogen at step edges that induces oxygen loss and destabilizes Cu atoms within the step ...

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1,8-Diamidocarbazoles: an easily tuneable family of fluorescent anion sensors and transporters

03-Jul-2018 | Krzysztof Marek Bąk; Krzysztof Chabuda; Helena Montes; Roberto Quesada; Michał Jan Chmielewski, Organic & Biomolecular Chemistry, 2018

The synthesis, structure and anion recognition properties of an extensive, rationally designed series of bisamide derivatives of 1,8-diaminocarbazole and 1,8-diamino-3,6-dichlorocarbazole are described. Despite simple structures and the presence of only three hydrogen bond donors, such compounds ...

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Understanding the non-covalent interaction mediated modulations on the electronic structure of quasi-zero-dimensional graphene nanoflakes

03-Jul-2018 | Amrit Sarmah; Pavel Hobza, Physical Chemistry Chemical Physics, 2018

In recent years, magnetic or electric field induced modulations on the electronic environment of single molecular systems are common practice. In this particular study, we have instigated the possibility of controlling the electronic and spin-dependent properties of hydrogen-terminated graphene ...

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Hydrofunctionalization of olefins to value-added chemicals via photocatalytic coupling

03-Jul-2018 | Yonghui Fan; Shenggang Li; Jingxian Bao; Lei Shi; Yanzhang Yang; Fei Yu; Peng Gao; Hui Wang; Liangshu Zhong; Yuhan Sun, Green Chemistry, 2018

A green strategy was developed for synthesis of various value-added chemicals using methanol, acetonitrile, acetic acid, acetone and ethyl acetate as the hydrogen source by coupling them with olefins over heterogeneous photocatalysts. A radical coupling mechanism was proposed for the ...

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Facile synthesis of a red light-inducible overall water-splitting photocatalyst using gold as a solid-state electron mediator

03-Jul-2018 | Kento Kamijyo; Toshihiro Takashima; Masaomi Yoda; Junya Osaki; Hiroshi Irie, Chemical Communication, 2018

We facilely prepared a solid-state heterojunction photocatalyst in which zinc rhodium oxide (ZnRh2O4) and bismuth vanadium oxide (Bi4V2O11) as hydrogen (H2) and oxygen (O2) evolution photocatalysts, respectively, were connected with gold (Au) to generate ZnRh2O4/Au/Bi4V2O11. ZnRh2O4/Au/Bi4V2O11 ...

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Hydrogen-bonding-directed helical nanofibers in a polythiophene-based all-conjugated diblock copolymer

03-Jul-2018 | Juan Peng; Huina Cui; Xiaosong Chen; Yue Wang; Feng Qiu; Dacheng Wei, Soft Matter, 2018

One-dimensional (1D) helical nanofibers were yielded through the self-assembly of an achiral all-conjugated diblock copolymer, poly(3-hexylthiophene)-b-poly[3-(6-hydroxyl)hexylthiophene] (P3HT-b-P3HHT) in the aged pyridine solution. Such helical nanofibers were formed driven by the π-π ...

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