Zobrazeno 1 - 10 of 3 923 pro vyhledávání: '"Polar effect"'
1
Construction of a Brönsted-Lewis solid acid catalyst La-PW-SiO2/SWCNTs based on electron withdrawing effect of La(III) on π bond of SWCNTs for biodiesel synthesis from esterification of oleic acid and methanol
Autor: Caixia Zhang, Xinyuan Liu, Yanting Huo, Qing Shu, Laixi Zou, Yuhui Tan
Publikováno v: Chinese Journal of Chemical Engineering. 44:351-362
A novel solid Bronsted-Lewis acid catalyst La-PW-SiO2/SWCNTs was synthesized from the synergistic modification of H3PW12O40 (HPW) by single-walled carbon nanotubes functionalized with sidewall hydroxyl groups (SWCNTs–OH) and La3+ via sol-gel method
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a7248ea6ba34e881ee80cbf11d181f5
https://doi.org/10.1016/j.cjche.2021.02.002
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2
O2 reduction by iron porphyrins with electron withdrawing groups: to scale or not to scale
Autor: Sk Amanullah, Paramita Saha, Abhishek Dey
Publikováno v: Faraday Discussions. 234:143-158
Iron porphyrins are synthesized by systematically introducing electron withdrawing groups (EWGs) on pyrroles to evaluate the relationship between rate (k) and overpotential (η). The results indicate that while EWGs lead to a rise in the thermodynami
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d8d2e3ad67f32e33c53af4cef2bd5b4a
https://doi.org/10.1039/d1fd00076d
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3
Degradation of nitrobenzene-containing wastewater by sequential nanoscale zero valent iron-persulfate process
Autor: Youzhi Liu, Weizhou Jiao, Jingjuan Qiao
Publikováno v: Green Energy & Environment, Vol 6, Iss 6, Pp 910-919 (2021)
As nitrobenzene (NB) is structurally stable and difficult to degrade due to the presence of an electron withdrawing group (nitro group). The sequential nanoscale zero valent iron-persulfate (NZVI-Na2S2O8) process was proposed in this study for the de
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c60a9cf54f0012443de259b6f8cebce
http://www.sciencedirect.com/science/article/pii/S2468025720301187
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4
Ketone Incorporation Extends the Emission Properties of the Xanthene Scaffold Beyond 1000 nm †
Autor: Siddharth S. Matikonda, Harrison C. Daly, Martin J. Schnermann, Helena C. Steffens, Bastian Ruehle, Ute Resch-Genger, Joseph Ivanic
Publikováno v: Photochemistry and Photobiology. 98:325-333
Imaging in the shortwave-infrared region (SWIR, λ = 1000-2500 nm) has the potential to enable deep tissue imaging with high resolution. Critical to the development of these methods is the identification of low molecular weight, biologically compatib
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb82e7a4fb8cfedb37dc1d2a42e1d9cf
https://doi.org/10.1111/php.13544
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5
Structure–activity relationship of the aromatic moiety of 6-substituted 5,6-dihydro-2H-pyran-2-one to find the novel compound showing higher plant growth inhibitory activity
Autor: Ryota Ochi, Hisashi Nishiwaki, Kaori Yoneyama, Satoshi Yamauchi
Publikováno v: Bioscience, Biotechnology, and Biochemistry. 86:165-169
In the course of our research on the structure–activity relationship of 5,6-dihydro-2H-pyran-2-one, (S)-6-[(R)-2-hydroxy-6-(4-fluorophenyl)hexyl]-5,6-dihydro-2H-pyran-2-one was found to show 2-3-fold more potent plant growth inhibitory activity aga
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8e81a450ff544a37da9724779ac4351
https://doi.org/10.1093/bbb/zbab185
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7
Self-aggregation of synthetic zinc 3-hydroxymethyl-chlorophyll-a derivatives possessing electron-withdrawing groups at the 20-position in aqueous micelle solution
Autor: Masashi Kishi, Kana Sakaguchi, Yusuke Kinoshita, Hitoshi Tamiaki
Publikováno v: Journal of Porphyrins and Phthalocyanines. 25:1104-1110
Zinc methyl 3-hydroxymethyl-pyropheophorbides-[Formula: see text] bearing an acetyl or nitro group at the 20-position were prepared by chemically modifying natural chlorophyll-[Formula: see text]. The synthetic zinc 20-substituted bacteriochlorophyll
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::baa495d57056d91a92411176bf370d91
https://doi.org/10.1142/s1088424621501017
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8
Investigation of type-I conformations of A2B4-[26]hexaphyrins(1.1.1.1.1.1) bearing strongly electron-withdrawing aryl substituents at 5,20-positions
Autor: Yoichi Nagano, Masaaki Suzuki
Publikováno v: Journal of Porphyrins and Phthalocyanines. 25:1064-1071
The dumbbell-shaped type-I conformation is the inherent structure of the [26]hexaphyrin(1.1.1.1.1.1) framework without any perturbations from its peripheral substituents. Conversely, the rectangular type-II conformation can be regarded as a more gene
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::51f3abdfbe9c2a6513387ef05c051467
https://doi.org/10.1142/s1088424621500978
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10
Electrostatic Potential Field Effects on Amine Macrocyclizations within Yoctoliter Spaces: Supramolecular Electron Withdrawing/Donating Groups
Autor: Ruiqing Wang, Mary Teeler, Yahya A. Ismaiel, Xiaoyang Cai, Kaiyu Wang, Wei Yao, Bruce C. Gibb
Publikováno v: The Journal of Physical Chemistry. B
The central role of Coulombic interactions in enzyme catalysis has inspired multiple approaches to sculpting electrostatic potential fields (EPFs) for controlling chemical reactivity, including ion gradients in water microdroplets, the tips of STMs,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::305fe53b9af6fbcf47a022746232ab44
https://doi.org/10.1021/acs.jpcb.1c05238
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