A binol-strapped calix[4]pyrrole as a model chirogenic receptor for the enantioselective recognition of carboxylate anions.
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چکیده
منابع مشابه
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Calix[4]pyrroles such as meso-octamethylcalix[4]pyrrole 1 have been extensively studied as anion and ion-pair receptors over recent years. Subsequently ‘strapped’ calix[4]pyrroles, pioneered by Lee and Sessler, have been synthesised that contain a single linker between distal meso-positions. These compounds have increased 15 affinity for anions relative to the parent macrocycle. Recently there ...
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Binding of a porphyrin carboxylate anion () to tetrathiafulvalene calix[4]pyrrole (TTF-C4P) results in electron transfer from TTF-C4P to Li(+)@C60 to produce the charge-separated state (1/TTF-C4P˙(+)/Li(+)@C60˙(-)) in benzonitrile. Upon photoexcitation of , photoinduced electron transfer from the triplet excited state of to TTF-C4P˙(+) occurs to produce the higher energy charge-separated state ...
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In this manuscript we consider from a theoretical point of view the recently reported experimental quantification of anion-π interactions (the attractive force between electron deficient aromatic rings and anions) in solution using aryl extended calix[4]pyrrole receptors as model systems. Experimentally, two series of calix[4]pyrrole receptors functionalized, respectively, with two and four ary...
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In order to understand the still-poorly understood interplay between calix[4]arene conformations and cation and anion recognition in multicomponent systems, the ion pair receptors 1 and 2 were synthesized. In solution and in the solid state, the calix[4]arene subunit of receptor 1 adopts a cone conformation, while that of 2 interconverts between the cone and the partial cone conformation. These...
متن کاملSensing of antipyretic carboxylates by simple chromogenic calix[4]pyrroles.
We present a simple, two- or three-step method for the synthesis of chromogenic octamethylcalix[4]pyrrole-based (OMCP) sensors for anions. Electrophilic aromatic substitution allows for converting the pyrrole moieties of OMCP into a dye. The formation of a sensor-anion complex results in partial charge transfer and a dramatic change in color. The absorption (UV-vis) and NMR titration experiment...
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عنوان ژورنال:
- Angewandte Chemie
دوره 46 14 شماره
صفحات -
تاریخ انتشار 2007