2020
DOI: 10.26434/chemrxiv.13031843.v1
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Twistable Dipolar Aryl Rings as Electric Field Actuated Conformational Molecular Switches

Abstract: The ability to control the chemical conformation of a system via external stimuli is a promsing route for developing molecular switches. For eventual deployment as viable sub-nanoscale components that are compatible with current electronic device technology, conformational switching should controllable by a local electric field (i.e. E-field gateable) and accompanied by a rapid change in conduction. In organic chemical systems the degree of π-conjugation is linked to the degree of electronic delocalisation, an… Show more

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“…Calculations based on a rigorous inclusion of the effect of a given electric field on the electrons and nuclei have predicted that EEFs can catalyze many types of reactions (e.g., Diels−Alder reactions, 25,35,36 other types of cycloaddition reactions, 37 the Menshutkin reaction, 38 ring opening reactions, 39 electrophilic aromatic substitution reactions, 40 oxidative addition reactions between palladium catalysts and alkyl/ aryl electrophiles, 41 the Kemp elimination reaction, 42 thermal isomerization and photoisomerization of azobenzene, 43 degradation of bromobenzene 44 ), improve the efficiency of heterogeneous catalysts, 45,46 control the selectivity of reactions, [23][24][25]35,47 cause drastic changes in reaction mechanisms 25,40 and induce conformational rearrangements. 48 All these effects can be understood on the basis of the ionicity induced by EEFs on bonds and transition states, which, in turn, can be rationalized using a valence bond perspective. 2−5 The effect of OEEFs on reactivity can also be rationalized by using quantitative activation strain and Kohn−Sham molecular orbital theory, as recently shown by Bickelhaupt and coworkers.…”
Section: ■ Introductionmentioning
confidence: 99%
“…Calculations based on a rigorous inclusion of the effect of a given electric field on the electrons and nuclei have predicted that EEFs can catalyze many types of reactions (e.g., Diels−Alder reactions, 25,35,36 other types of cycloaddition reactions, 37 the Menshutkin reaction, 38 ring opening reactions, 39 electrophilic aromatic substitution reactions, 40 oxidative addition reactions between palladium catalysts and alkyl/ aryl electrophiles, 41 the Kemp elimination reaction, 42 thermal isomerization and photoisomerization of azobenzene, 43 degradation of bromobenzene 44 ), improve the efficiency of heterogeneous catalysts, 45,46 control the selectivity of reactions, [23][24][25]35,47 cause drastic changes in reaction mechanisms 25,40 and induce conformational rearrangements. 48 All these effects can be understood on the basis of the ionicity induced by EEFs on bonds and transition states, which, in turn, can be rationalized using a valence bond perspective. 2−5 The effect of OEEFs on reactivity can also be rationalized by using quantitative activation strain and Kohn−Sham molecular orbital theory, as recently shown by Bickelhaupt and coworkers.…”
Section: ■ Introductionmentioning
confidence: 99%