Anion effects on the cyclobis(paraquat-p-phenylene) host.
نویسندگان
چکیده
Binding studies between the electron accepting host cyclobis(paraquat-p-phenylene) and a series of electron donors in the presence of differently sized counteranions reveal that both the nature and the concentration of the anion have a large impact on the association strength of the resulting host-guest complex.
منابع مشابه
A pentiptycene-based bis(crown ether) host: synthesis and its complexation with cyclobis(paraquat-p-phenylene).
A novel pentiptycene-based bis(crown ether) host incorporating two dibenzo-24-crown-8 ether moieties has been synthesized, and its efficient complexation ability toward cyclobis(paraquat-p-phenylene) in solution and in the solid state has been explored.
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Pentiptycene-based mono(crown ether)s and tetracationic cyclobis(paraquat-p-phenylene) can form 1 : 1 stable complexes in solution and in the solid state, in which both of the components act as the host as well as the guest.
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Cyclobis(paraquat-p-phenylene)s complexed with anionic surfactants exhibit liquid-crystalline states and form pseudorotaxanes with tetrathiafulvalene in the condensed states.
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The tendency for viologen radical cations to dimerize has been harnessed to establish a recognition motif based on their ability to form extremely strong inclusion complexes with cyclobis(paraquat-p-phenylene) in its diradical dicationic redox state. This previously unreported complex involving three bipyridinium cation radicals increases the versatility of host-guest chemistry, extending its p...
متن کاملPressure effects in the synthesis of isomeric rotaxanes.
Pressure not only influences the yield in the synthesis of a two-station [2]rotaxane, it also determines the distribution of the co-conformational isomers. At high pressure cyclobis(paraquat-p-phenylene) is preferentially assembled around a monopyrrolotetrathiafulvalene unit, while at low pressure it is preferentially assembled around a hydroquinone unit.
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ورودعنوان ژورنال:
- Chemical communications
دوره 48 42 شماره
صفحات -
تاریخ انتشار 2012