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Showing 1 to 8 of 8 for “"Counteranion"”.
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Transition path sampling in organometallic catalysis: Overcoming the rare event problem in ab initio molecular dynamics
… energy profile of this system with and without a counteranion present. These simulations showed that the counteranion-dipole interactions have a significant impact on the preferred configuration of the catalyst and the free energy profile of the transfer.
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Micellar properties of spermicidal and microbicidal quaternary ammonium surfactants
… such as alkyl-chain length, head-group size, counteranion, and biological activity are discussed. [See document for figures of ADn and ATn]
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Tailoring Structure and Function of Imidazole-Containing Block Copolymers for Emerging Applications from Gene Delivery to Electromechanical Devices
… thermal and solution properties, and the bromide counteranion quantitatively exchanged to tetrafluoroborate (BF4), trifluoromethanesulfonate (TfO), and bis(trifluoromethanesulfonyl)imide (Tf2N). Thermogravimetric analysis revealed that thermal stability increased with decreased alkyl substituent …
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Stereoselective Intramolecular Rhodium(I)-Catalyzed [(3+2+2)] Cycloaddition Reactions of Alkylidenecyclopropanes (ACPs) for the Concise Synthesis of Bridged Tricyclic Products
… of ACPs and the emergence of asymmetric chiral counteranion-directed catalysis (ACDC) strategies, our work—enantioselective intramolecular rhodium-catalyzed [(3+2+2)] cycloaddition of ACPs leveraging a novel ACDC approach—is discussed. This strategy enables asymmetric induction via the …
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Self-Assembly and Gelation Behaviour of Pyridyl Urea Complexes
… was not reproduced. A similar dependency on counteranion was observed with N,N''-pentylene-1,5-diylbis(N'-pyridin-3-ylurea) which was similarly crystallised with silver(I) nitrate, acetate and tetrafluoroborate. In the presence of the latter, a quintuple helix formed. Several …
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Functional Block Copolymers via Anionic Polymerization for Electroactive Membranes
… or bis(trifluoromethane sulfonyl)imide (Tf2N) counteranions. Differential scanning calorimetry and dynamic mechanical analysis provided corresponding thermomechanical properties. Factors including cyclic substituents, counteranion type, as well as ionic concentration significantly influenced …
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Influence of Electrostatic and Intermolecular Interactions on the Solution Behavior and Electrospinning of Functional Nanofibers
… methacrylate) (DMAEMA) were synthesized with the counteranions Cl-, NO3-, (CN)2N-, BF4-, PF6-, triflate (TfO-), and bis(trifluoromethanesulfonyl)imide (Tf2N-). The counteranion selection controlled the thermal transitions and degradation; the larger and more charge-delocalized anions typically …
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Development of the cross-coupling of alcohols with olefins via positional tuning of the counterion in transition metal catalysis
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01