Results 121 to 130 of about 32,802 (321)

Excitation Dynamics in Low Band Gap Donor-Acceptor Copolymers and Blends

open access: yes, 2012
Donor-acceptor (D-A) type copolymers show great potential for the application in the active layer of organic solar cells. Nevertheless the nature of the excited states, the coupling mechanism and the relaxation pathways following photoexcitation are yet ...
Deibel, Carsten   +7 more
core   +1 more source

Silver and platinum-catalysed addition of O–H and N–H bonds to allenes [PDF]

open access: yes, 2014
Transition-metal catalysed nucleophile addition to allenes is a very powerful tool for the synthesis of functionalised molecules containing heteroatoms, heterocycles in the intramolecular version, or allyl derivatives in the intermolecular version.
Munoz-Herranz, Maria
core   +1 more source

Rational Backbone Planarization for Doping‐Resilient Polymeric Hole Transport Materials Toward Stable and Scalable Perovskite Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Incorporating divinylbenzene into PTAA‐based copolymers induces backbone planarization and promotes polaron delocalization, leading to enhanced doping resilience and stabilized electronic structure. The resulting hole‐transport material, PDVB14, maintains robust performance under high dopant concentrations and prolonged device operation, offering a ...
Chanhyeok Kim   +10 more
wiley   +1 more source

Release of organic nitrogen compounds from Kerogen via catalytic hydropyrolysis

open access: yesGeochemical Transactions, 2000
High hydrogen pressure pyrolysis (hydropyrolysis) was performed on samples of solvent extracted Kimmeridge Clay Formation source rock with a maturity equivalent to ca. 0.35% vitrinite reflectance.
Bennett B, Love GD
doaj   +1 more source

The photophysics of nitrocarbazoles studied by using spectroscopic, photoacoustic and luminescence techniques [PDF]

open access: yes, 2003
The photophysical behaviour of 1-nitrocarbazol and 3-nitrocarbazol in different organic solvents has been studied by using spectroscopic, luminescence and photoacoustic techniques.
Bilmes, Gabriel Mario   +4 more
core   +1 more source

Presence of opportunistic oil-degrading microorganisms operating at the initial steps of oil extraction and handling [PDF]

open access: yes, 2010
Hydrocarbon-degrading microorganisms from natural environments have been isolated and identified using culture-dependent or molecular techniques. However, there has been little research into the occurrence of microorganisms incorporated into crude oil in
Isabel Ferrera   +5 more
core   +2 more sources

Schmidt-Reaktion an Tetrahydro-chinolon-Derivaten

open access: yesCHIMIA, 1976
The synthesis of the Tetrahydro-quinolones incorporated in indoles (I, II, III), carbazoles (VII, VIII) and tetrahydrocarbazoles (XIII, XIV) is described.
H.P. Härter   +3 more
doaj   +1 more source

Self‐Assembly Pathways of Carbazole‐derived Macrocycles Into Nanotubular Architectures

open access: yesAggregate
Cooperative self‐assembly based on multiple non‐covalent interactions is ubiquitous in nature, yet the rational design of artificial cooperative systems remains challenging.
Yingbo Lu   +10 more
doaj   +1 more source

An Efficient Selectfluor-Mediated Oxidative Thio- and Selenocyanation of Diversely Substituted Indoles and Carbazoles

open access: yesHeteroatom Chemistry, 2019
A facile Selectfluor-mediated oxidative method for direct introduction of SCN and SeCN groups into diversely substituted indoles and carbazoles is described, by employing readily available thiocyanate and selenocyanate salts, and the scope of the method ...
Rodrigo Abonia   +4 more
doaj   +1 more source

Transition-Metal Catalysis of Nucleophilic Substitution Reactions: A Radical Alternative to S_N1 and S_N2 Processes [PDF]

open access: yes, 2017
Classical methods for achieving nucleophilic substitutions of alkyl electrophiles (S_N1 and S_N2) have limited scope and are not generally amenable to enantioselective variants that employ readily available racemic electrophiles.
Fu, Gregory C.
core  

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