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1. Hydrogen bond system generated by nitroamino rearrangement: new character for designing next generation energetic materials

Author:
Hu, Lu; Staples, Richard J.; Shreeve, Jean’ne M.
Source:
Chemical communications 2021 v.57 no.5 pp. 603-606
ISSN:
1364-548X
Subject:
hydrogen; hydrogen bonding,   etc   ; oxygen;     Show all 3 Subject
Abstract:
... A new hydrogen bond system is formed by the transfer of a proton from nitroamino to form nitroimino. The proton and the oxygen in nitroimino form an intramolecular hydrogen bond and two intermolecular hydrogen bonds that shorten the distance between molecules both vertically and horizontally leading to higher density. ...
DOI:
10.1039/d0cc07101c

2. Controlling hydrogen evolution reaction activity on Ni core–Pt island nanoparticles by tuning the size of the Pt islands

Author:
Alinezhad, Ali; Benedetti, Tania M.; Lian, Jiaxin; Gonçales, Vinicius R.; Gooding, J. Justin; Tilley, Richard D.
Source:
Chemical communications 2021 v.57 no.22 pp. 2788-2791
ISSN:
1364-548X
Subject:
hydrogen; hydrogen production,   etc   ; energy; surface area;     Show all 4 Subjects
Abstract:
... Pt islands with different sizes were grown on amorphous Ni nanoparticles, allowing the tuning of the Pt–Ni interface without changing the hydrogen binding energy of the Pt sites. As a result, the HER activity of the electrocatalysts increases by decreasing the size of the Pt islands due to the greater surface area of the Pt–Ni interfaces. ...
DOI:
10.1039/d0cc07769k

3. A review on the factors influencing biohydrogen production from lactate: The key to unlocking enhanced dark fermentative processes

Author:
García-Depraect, Octavio; Castro-Muñoz, Roberto; Muñoz, Raúl; Rene, Eldon R.; León-Becerril, Elizabeth; Valdez-Vazquez, Idania; Kumar, Gopalakrishnan; Reyes-Alvarado, Luis C.; Martínez-Mendoza, Leonardo J.; Carrillo-Reyes, Julián; Buitrón, Germán
Source:
Bioresource technology 2021 v.324 pp. 124595
ISSN:
0960-8524
Subject:
hydrogen; hydrogen production,   etc   ; fermentation; lactic acid; wastewater;     Show all 5 Subjects
Abstract:
... Dark fermentation (DF) is one of the most promising biological methods to produce bio-hydrogen and other value added bio-products from carbohydrate-rich wastes and wastewater. However, process instability and low hydrogen production yields and rates have been highlighted as the major bottlenecks preventing further development. Numerous studies have associated such concerns with the inhibitory acti ...
DOI:
10.1016/j.biortech.2020.124595

4. Light-driven hydrogen production with CdSe quantum dots and a cobalt glutathione catalyst

Author:
Burke, Rebeckah; Chakraborty, Saikat; McClelland, Kevin P.; Jelušić, Jana; Matson, Ellen M.; Bren, Kara L.; Krauss, Todd D.
Source:
Chemical communications 2021 v.57 no.16 pp. 2053-2056
ISSN:
1364-548X
Subject:
hydrogen; hydrogen production,   etc   ; catalysts; cobalt; glutathione; photocatalysis;     Show all 6 Subjects
Abstract:
... A photocatalytic hydrogen (H₂) production system is reported using glutathione (GSH)-capped CdSe QDs with a cobalt precatalyst, yielding 130 000 mol H₂ per mol cobalt over 48 hours. Analysis of the reaction mixtures after catalysis indicates that the active catalyst is a labile complex of cobalt and GSH formed in situ. ...
DOI:
10.1039/d0cc07364d

5. Modulation of charge transport through single-molecule bilactam junctions by tuning hydrogen bonds

Author:
Chen, Yaorong; Wang, Hua-Chun; Tang, Yongxiang; Zhou, Yu; Huang, Longfeng; Cao, Jian; Tang, Chun; Zhang, Manxi; Shi, Jia; Liu, Junyang; Ren, Xiancheng; Xu, Yun-Xiang; Hong, Wenjing
Source:
Chemical communications 2021 v.57 no.15 pp. 1935-1938
ISSN:
1364-548X
Subject:
hydrogen; hydrogen bonding,   etc   ; chemical structure; solvents;     Show all 4 Subjects
Abstract:
... Bilactam derivatives with different side groups were synthesized and the twisting angle tuning effect induced by the intramolecular hydrogen bond on the charge transport through their single-molecule junctions was investigated. Molecules with strong intramolecular hydrogen bonds exhibited twice higher conductance because of the reduced dihedral twisting, which was reversible with the addition of h ...
DOI:
10.1039/d0cc07423c

6. [FeFe]-Hydrogenases: maturation and reactivity of enzymatic systems and overview of biomimetic models

Author:
Kleinhaus, Julian T.; Wittkamp, Florian; Yadav, Shanika; Siegmund, Daniel; Apfel, Ulf-Peter
Source:
Chemical Society reviews 2021 v.50 no.3 pp. 1668-1784
ISSN:
1460-4744
Subject:
hydrogen; hydrogen production,   etc   ; biomimetics; electrochemistry; energy; enzymes;     Show all 6 Subjects
Abstract:
... While hydrogen plays an ever-increasing role in modern society, nature has utilized hydrogen since a very long time as an energy carrier and storage molecule. Among the enzymatic systems that metabolise hydrogen, [FeFe]-hydrogenases are one of the most powerful systems to perform this conversion. In this light, we will herein present an overview on developments in [FeFe]-hydrogenase research with ...
DOI:
10.1039/d0cs01089h

7. Paracetamol and other acetanilide analogs as inter-molecular hydrogen bonding assisted diamagnetic CEST MRI contrast agents

Author:
Chakraborty, Subhayan; Peruncheralathan, S.; Ghosh, Arindam
Source:
RSC advances 2021 v.11 no.12 pp. 6526-6534
ISSN:
2046-2069
Subject:
hydrogen; hydrogen bonding,   etc   ; acetaminophen; humans; solvents; temperature;     Show all 6 Subjects
Abstract:
... Paracetamol and a few other acetanilide derivatives are reported as a special class of diamagnetic Chemical Exchange Saturation Transfer (diaCEST) MRI contrast agents, that exhibit contrast only when the molecules form inter-molecular hydrogen bonding mediated molecular chains or sheets. Without the protection of the hydrogen bonding their contrast producing labile proton exchanges too quickly wit ...
DOI:
10.1039/d0ra10410h

8. Hydrogen-bonded nickel(i) complexes

Author:
Wilson, Jessica R.; Zeller, Matthias; Szymczak, Nathaniel K.
Source:
Chemical communications 2021 v.57 no.6 pp. 753-756
ISSN:
1364-548X
Subject:
hydrogen; hydrogen bonding,   etc   ; fluorides; nickel; spectral analysis;     Show all 5 Subjects
Abstract:
... A series of nickel(ii) tris(2-pyridylmethyl)amine (TPA) complexes featuring appended hydrogen bonds (H-bonds) to halides (F, Cl, Br) was synthesized and charcterized. Reduction to the nickel(i) state provided access to an unusual nickel(i) fluoride complex stabilized by H-bonds, enabling structural and spectroscopic characterization. ...
DOI:
10.1039/d0cc07216h

9. A Review of Unique Aluminum–Water Based Hydrogen Production Options

Author:
Bolt, Andre; Dincer, Ibrahim; Agelin-Chaab, Martin
Source:
Energy & fuels 2021 v.35 no.2 pp. 1024-1040
ISSN:
1520-5029
Subject:
hydrogen; hydrogen production,   etc   ; aluminum; aluminum oxide; energy;     Show all 5 Subjects
Abstract:
... This comprehensive review paper compares the different methods developed experimentally to produce hydrogen by reacting aluminum and water. The alumina oxide layer which forms on the exterior surface of aluminum inhibits the reaction from taking place. Therefore, this paper presents a variety of techniques used to eliminate the oxide layer so that the reaction can continuously take place. The revi ...
DOI:
10.1021/acs.energyfuels.0c03674

10. Hydrogen solubility and diffusivity at Σ3 grain boundary of PdCu

Author:
Liu, L. C.; Gong, H. R.
Source:
RSC advances 2021 v.11 no.22 pp. 13644-13652
ISSN:
2046-2069
Subject:
hydrogen,   etc   ; diffusivity; solubility;     Show all 3 Subjects
Abstract:
... First principles calculations have been performed to comparatively reveal hydrogen solubility and diffusivity at grain boundaries of BCC and FCC PdCu phases. It is found that the temperature-dependent hydrogen solubility at BCC Σ3 (112) GB of PdCu seems much higher than that in BCC PdCu bulk, while hydrogen solubility in FCC Σ3 (111) GB of PdCu is much lower than that in its corresponding FCC bulk ...
DOI:
10.1039/d0ra10133h

11. Complementary atomic flame/molecular colorimetry dual-mode assay for sensitive and wide-range detection of cancer cells

Author:
Fang, Xueting; Zhang, Xiaoting; Zhang, Zhihua; Hu, Shengqiang; Ye, Fanggui; Zhao, Shulin
Source:
Chemical communications 2021 v.57 no.27 pp. 3327-3330
ISSN:
1364-548X
Subject:
hydrogen peroxide,   etc   ; colorimetry; platinum;     Show all 3 Subjects
Abstract:
... Since multicolor switch was involved in both Sr²⁺-related flame and precipitation reactions, these reactions can be thus utilized for constructing a complementary atomic flame/molecular colorimetry dual-mode sensing platform for a sensitive and wide-range analysis of cancer cells by virtue of the gas generation from platinum nanozyme-mediated hydrogen peroxide decomposition. ...
DOI:
10.1039/d1cc00192b

12. Size-selective synthesis of platinum nanoparticles on transition-metal dichalcogenides for the hydrogen evolution reaction

Author:
Mei, Liang; Gao, Xiaoping; Gao, Zhan; Zhang, Qingyong; Yu, Xinge; Rogach, Andrey L.; Zeng, Zhiyuan
Source:
Chemical communications 2021 v.57 no.23 pp. 2879-2882
ISSN:
1364-548X
Subject:
hydrogen production,   etc   ; nanosheets; platinum;     Show all 3 Subjects
Abstract:
... We report a micellar system to prepare Pt-TMDs composites with tunable Pt nanoparticles (NPs, 2–6 nm in size) on single-layer TMDs (MoS₂, TiS₂, TaS₂) nanosheets. The Pt–MoS₂ composites have shown excellent performance for the hydrogen evolution reaction (HER) with the Pt NPs exhibiting a volcano-type size effect toward HER activity due to the synergistic effects between the Pt NPs and MoS₂. ...
DOI:
10.1039/d0cc08091h

13. Bifunctional amino sulfonamide-catalyzed asymmetric conjugate addition to alkenyl alkynyl ketimines as enone surrogates

Author:
Homma, Chihiro; Kano, Taichi; Maruoka, Keiji
Source:
Chemical communications 2021 v.57 no.22 pp. 2808-2811
ISSN:
1364-548X
Subject:
hydrogen,   etc   ; catalysts; enantioselectivity; ketimines;     Show all 4 Subjects
Abstract:
... A bifunctional amino sulfonamide-catalyzed asymmetric conjugate addition of aldehydes to alkenyl alkynyl ketimines as reactive surrogates for enones has been developed. Use of a phenylcyclopropane-based amino sulfonamide catalyst, which can activate and orient the ketimines through hydrogen bonding, affords the desired conjugate adducts with high chemo-, diastereo- and enantioselectivity. ...
DOI:
10.1039/d0cc07842e

14. Negative ion formation by neutral hydrogen atom grazing scattering from a LiF(100) surface

Author:
Jin, Bo; Zhou, Hu; Zong, Zewen; Zhang, Xin; Wang, Guangyi; Zhou, Lihua; Chen, Ximeng
Source:
RSC advances 2021 v.11 no.8 pp. 4489-4498
ISSN:
2046-2069
Subject:
hydrogen,   etc   ; energy; probability;     Show all 3 Subjects
Abstract:
... We present a theoretical description of negative ion conversion of the grazing scattering of neutral hydrogen atoms on LiF(100) surface. Here, in addition to the capture of a valence band electron near a surface F⁻ site by an incident H atom, the Coulomb repulsive barrier tunneling behavior is also considered to treat the detachment of the affinity electron from the formed H⁻ ion to vacuum through ...
DOI:
10.1039/d0ra08486g

15. Imidazolium-based catenane host for bromide recognition in aqueous media

Author:
Serpell, Christopher J.; Park, Ah Young; Robinson, Carol V.; Beer, Paul D.
Source:
Chemical communications 2021 v.57 no.1 pp. 101-104
ISSN:
1364-548X
Subject:
hydrogen,   etc   ; catenanes; imidazoles;     Show all 3 Subjects
Abstract:
... The synthesis of a novel catenated system which is dense in cationic hydrogen bonding imidazolium units is described. The interlocked host system displays a preference for binding of bromide over other halides, overcoming basicity and Hofmeister trends, under aqueous conditions. This is the first example of an imidazolium-based catenane acting as an anion host through C–H hydrogen bonding. ...
DOI:
10.1039/d0cc06299e

16. Mechanistic investigation on the remote stereocontrol in the chiral Lewis base-catalyzed, SiCl4-promoted kinetic resolution of chlorinated cis-vinyl epoxides

Author:
Jung, Jungi; Song, Mugeon; Choi, Jun-Ho; Chung, Won-jin
Source:
Tetrahedron 2021 v.77 pp. 131763
ISSN:
0040-4020
Subject:
hydrogen bonding,   etc   ; enantioselectivity; epoxides;     Show all 3 Subjects
Abstract:
... It has been known that the enantioselectivity of the chiral Lewis base-catalyzed, SiCl₄-promoted kinetic resolution of α,β-dichloro cis-vinyl epoxide is highly influenced by the configuration of the distal β-chlorine-bearing stereocenter. In this report, the precise nature of this unusual remote stereocontrol was investigated both experimentally and theoretically. Upon examination of a substrate t ...
DOI:
10.1016/j.tet.2020.131763

17. Reversible hydrogen-bonded polymerization regulated by allosteric metal templation

Author:
Xiao, Tangxin; Zhong, Weiwei; Yang, Weiwei; Qi, Lijie; Gao, Yan; Sue, Andrew C.-H.; Li, Zheng-Yi; Sun, Xiao-Qiang; Lin, Chen; Wang, Leyong
Source:
Chemical communications 2020 v.56 no.92 pp. 14385-14388
ISSN:
1364-548X
Subject:
hydrogen; hydrogen bonding,   etc   ; polymerization;     Show all 3 Subject
Abstract:
... Allosteric effects are common in biology, but have not been fully explored in the control of supramolecular polymerization. Herein, ditopic UPy derivatives with acyclic crown ether-like spacers were designed and synthesized, which can undergo supramolecular polymerization through quadruple hydrogen bonding. Upon the addition of K⁺, drastic molecular conformational change to the U-shape is induced ...
DOI:
10.1039/d0cc06381a

18. A neutral red mediated electro-fermentation system of Clostridium beijerinckii for effective co-production of butanol and hydrogen

Author:
Zhang, Yafei; Li, Jianzheng; Meng, Jia; Sun, Kai; Yan, Han
Source:
Bioresource technology 2021 v.332 pp. 125097
ISSN:
0960-8524
Subject:
hydrogen; hydrogen production,   etc   ; Clostridium beijerinckii; butanol; carbon; electrodes; fermentation; glucose;     Show all 8 Subjects
Abstract:
... To enhance the co-production of butanol and hydrogen by the acetone-butanol-ethanol (ABE) fermentation of Clostridium beijerinckii, a novel cathodic electro-fermentation (CEF) system was constructed with neutral red (NR) as electron mediator. With the mediation of NR, production of butanol and hydrogen from glucose in the CEF system achieved 5.49 ± 0.28 g/L and 3.74 ± 0.16 L/L, 569.5% and 325.0% h ...
DOI:
10.1016/j.biortech.2021.125097

19. A strategy for successive feedstock reuse to maximize photo-fermentative hydrogen production of Arundo donax L.

Author:
Jiang, Danping; Yue, Tian; Zhang, Zhiping; He, Chao; Jing, Yanyan; Lu, Chaoyang; Zhang, Huan; Chen, Zhou; Zhang, Quanguo
Source:
Bioresource technology 2021 v.329 pp. 124878
ISSN:
0960-8524
Subject:
hydrogen; hydrogen production,   etc   ; Arundo donax; cost effectiveness; feedstocks; technology;     Show all 6 Subjects
Abstract:
... This study proposed a strategy to maximize the hydrogen yield by reusing feedstock of Arundo donax L. For this purpose, a successive 4-batch photo-fermentative hydrogen production (PFHP) was carried out to test the strategy. About 50% of total hydrogen yield was additionally obtained by reusing the Arundo donax L for successive 4 times in comparison to single 1st batch (161.4 mL/U. cell dry weight ...
DOI:
10.1016/j.biortech.2021.124878

20. Recent developments of nanocatalyzed liquid-phase hydrogen generation

Author:
Wang, Changlong; Astruc, Didier
Source:
Chemical Society reviews 2021 v.50 no.5 pp. 3437-3484
ISSN:
1460-4744
Subject:
hydrogen; hydrogen production,   etc   ; clean energy; dehydrogenation; liquids; nanocatalysts;     Show all 6 Subjects
Abstract:
... Hydrogen is the most effective and sustainable carrier of clean energy, and liquid-phase hydrogen storage materials with high hydrogen content, reversibility and good dehydrogenation kinetics are promising in view of “hydrogen economy”. Efficient, low-cost, safe and selective hydrogen generation from chemical storage materials remains challenging, however. In this Review article, an overview of th ...
DOI:
10.1039/d0cs00515k