Results 71 to 80 of about 273,185 (175)
Crystal design using multipolar electrostatic interactions: A concept study for organic electronics
Beilstein Journal of Organic Chemistry, 2013 Using a simple synthetic protocol, heterohexacene analogues with a quadrupolar distribution of partial charges are readily available. In contrast to most other acenes, these compounds crystallize with a slipped-stack, brickwork-like packing which is ...
Peer Kirsch +2 more
doaj +1 more source
Estudos de fluorescencia em organo-gel [PDF]
, 1997 Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Um novo campo de estudo tem sido aberto com a solubilização de gelatina em microemulsão água em óleo. O sistema MBG é formado por Aerosol-OT, água e
Souza, Donizete de
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Diastereoselectivity in the Staudinger reaction of pentafluorosulfanylaldimines and ketimines
Beilstein Journal of Organic Chemistry, 2013 β-Lactams were diastereoselectively formed by the reaction of SF5-containing aldimines, or an SF5-containing ketimine, with benzyloxyketene in a conrotatory ring closure process. Imine formation and cyclization were possible in spite of the acidification
Alexander Penger +3 more
doaj +1 more source
Electrophilic fluorination at saturated carbon [PDF]
, 2000 Chapter 1 - Chapter 1 contains a discussion of the preparation and properties of elemental fluorine. A review of the use of elemental fluorine as a selective fluorinating in organic chemistry is given and the preparation and use of other selective ...
Parsons, Mandy
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The preferred conformation of erythro- and threo-1,2-difluorocyclododecanes
Beilstein Journal of Organic Chemistry, 2012 Cyclododecane adopts a square-like structure with corner and edge CH2 groups. In this study erythro- and threo-1,2-difluorocyclododecanes were prepared to explore whether the two vicinal C–F bonds, with different relative configurations, preferably ...
Yi Wang +4 more
doaj +1 more source
Estudos de reações de transesterificação com lipases imobilizadas e determinação de coeficiente de difusão de ésteres em organo-gel / [PDF]
, 1999 Tese (Doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.As lipases de Chromobacterium viscosum, Pseudomonas sp, Microbial e Lipolase, imobilizadas em organo-gel (MBG) de hexano foram usadas como ...
João, Jair Juarez
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Annals of West University of Timisoara: Physics, 2018 Photocatalytic degradation of organic pollutants from wastewater using titanium dioxide is recognized as an efficient process. To be feasible, this process needs to be solar- or visible light -activated, but, due to its wide band gap energy, titanium ...
Tismanar Ioana +3 more
doaj +1 more source
Fluorine-19 Magnetic Resonance Imaging of activated platelets
, 2020 A research letter describing an innovative method for imaging activated platelets using advanced fluorine‐19 magnetic resonance imaging.
J Palasubramaniam (10049237) +11 more
core +1 more source
Synthesis of enones, pyrazolines and pyrrolines with gem-difluoroalkyl side chains
Beilstein Journal of Organic Chemistry, 2013 Starting from easily accessible gem-difluoropropargylic derivatives, a DBU-mediated isomerisation affords enones in fair yields with a gem-difluoroalkyl chain.
Assaad Nasr El Dine +8 more
doaj +1 more source
The influence of fluorine substitution on some enzyme mediated reactions [PDF]
, 1997 The replacement of a hydrogen or hydroxy group with a fluorine atom is a popular strategy to alter the activity of biologically important molecules, as their similar sizes mean that such a replacement has little steric impact.
Bridge, Colin Francis
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