Zobrazeno 1 - 10 of 33 pro vyhledávání: '"Qiongzhong Jiang"'
1
Control of CIGS roughness by initial selenization temperature
Autor: Marsha L. Langhorst, Melissa Mushrush, Rebekah K. Feist, Ankur Khare, Art Wall, Steve Rozeveld, John J. Kim, Eugene Bykov, Qiongzhong Jiang
Publikováno v: 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC).
When formed by coevaporation, copper indium gallium diselenide (CIGS) films are typically more smooth than those formed by a two-step, precursor-selenization process. While some amount of roughness is desirable for minimizing reflection, extreme roug
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2b2b8073990d2d20f836482abcb82ad
https://doi.org/10.1109/pvsc.2015.7356222
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2
Some new chain-like terdentate phosphines, their ruthenium(II) coordination chemistry and the activity of the cations [Ru(MeCN)3(PhP{CH2CH2P(p-X-C6H4)2}2)]2+ (X=H, F, Me and OMe) as acetalization catalysts
Autor: Qiongzhong Jiang, Luigi M. Venanzi, Heinz Rüegger
Publikováno v: Inorganica Chimica Acta. 290:64-79
The new chain-like tritertiary phosphines PhP{CH2CH2P(p-X-C6H4)2}2, (X=F, Me and OMe), phetpX, were prepared and characterized. These ligands react with cis-[RuCl2(DMSO)4] giving equilibrium mixtures of the eclipsed (ec) and staggered (st) isomers of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41f4c5b5bbfc1bb1f15202e463472091
https://doi.org/10.1016/s0020-1693(99)00117-6
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4
Syntheses of novel chiral 2,5-dialkyl-7-azabicyclo[2.2.1]heptanes and 2,5-dialkyl-7-thiobicyclo[2.2.1]heptanes
Autor: Zhaoguo Zhang, Dengming Xiao, Xumu Zhang, Qiongzhong Jiang
Publikováno v: Tetrahedron Letters. 39:5331-5334
New C 2 -symmetric chiral amines with a rigid bicyclic framework have been synthesized via hydrogenation of monoazides catalyzed by 5% Pd/C in methanol. Enantiomerically pure 2,5-dialkyl-7-thiobicyclo[2.2.1]heptanes were made from readily available m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4afe00858264b5246329113209d1c199
https://doi.org/10.1016/s0040-4039(98)00989-7
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5
Highly Enantioselective Hydrogenation of Simple Ketones Catalyzed by a Rh-PennPhos Complex
Autor: Ping Cao, Xumu Zhang, Dengming Xiao, Jiang Yutong, Qiongzhong Jiang
Publikováno v: Angewandte Chemie International Edition. 37:1100-1103
Even alkyl methyl ketones undergo asymmetric hydrogenation with high enantioselectivity when a rhodium complex of the conformationally rigid chiral ligand 1 (Me-PennPhos; R=CH3 ) is used as the catalyst. Basic additives such as 2,6-lutidine contribut
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24ac93f25b4bcb4d68e3e57eb472ef5f
https://doi.org/10.1002/(sici)1521-3773(19980504)37:8<1100::aid-anie1100>3.0.co
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7
New chiral ligands for catalytic asymmetric transfer hydrogenation of ketones
Autor: Xumu Zhang, Jiang Yutong, Guangshan Zhu, Qiongzhong Jiang
Publikováno v: Tetrahedron Letters. 38:6565-6568
New chiral ligands 3 and 5 have been synthesized. Their Ru(II) complexes are effective catalysts for transfer hydrogenation of both aryl alkyl and dialkyl ketones (with ee's up to 79.5%).
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https://doi.org/10.1016/s0040-4039(97)01496-2
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8
Highly effective NPN-type tridentate ligands for asymmetric transfer hydrogenation of ketones
Autor: Guangshan Zhu, Xumu Zhang, Qiongzhong Jiang, Jiang Yutong
Publikováno v: Tetrahedron Letters. 38:215-218
New chiral NPN-type tridentate ligands containing two oxazoline rings and one phosphine have been synthesized, and their Ru(II) complexes show high reactivity and enantioselectivity in transfer hydrogenations of both aryl alkyl and dialkyl ketones (w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c24fb1465dbdd1b96cee5136a426c5ba
https://doi.org/10.1016/s0040-4039(96)02257-5
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9
Synthesis of (1,1′)-2,6-bis[1-(diphenylphosphino)ethyl]pyridine and its application in asymmetric transfer hydrogenation
Autor: Xumu Zhang, Qiongzhong Jiang, Daniel Van Plew, Shahid Murtuza
Publikováno v: Tetrahedron Letters. 37:797-800
A C 2 symmetric tridentate ligand, (1R, 1R′) 2,6-Bis[1-(diphenylphosphino)ethyl]pyridine, has been synthesized in enantiomerically pure form. A practical method to synthesize a variety of chiral pyridyl diols is reported. Asymmetric transfer hydrog
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b89e85a38c0270215ef064504c58b6c9
https://doi.org/10.1016/0040-4039(95)02298-8
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10
Determination of the absolute configurations of the epimers of the P-chiral phosphine Ph2PCH2CH2P☆Ph(L-(−)-methyl) by use of two-dimensional NMR spectroscopy in combination with a palladium(II) 'reporter complex'
Autor: Qiongzhong Jiang, Heinz Rüegger, Luigi M. Venanzi
Publikováno v: Journal of Organometallic Chemistry. 488:233-240
The two epimers of the new P-chiral phosphine Ph 2 PCH 2 CH 2 P ☆ Ph (L-(−)- menthyl ) (1-Rp and 1-Sp) were synthesized by treating Ph2PH with the diastereomerically pure forms of Ph(L-(−)-methyl)CHCH2)P). The palladium(II) complexes [ Pd ((
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a4a4104ebbc11bb6fce619b09dab55ed
https://doi.org/10.1016/0022-328x(94)00033-9
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