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Controlling the Pirouetting Motion in Rotaxanes by Counterion Exchange

Overview of attention for article published in Inorganic Chemistry, July 2014
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Title
Controlling the Pirouetting Motion in Rotaxanes by Counterion Exchange
Published in
Inorganic Chemistry, July 2014
DOI 10.1021/ic501246e
Pubmed ID
Authors

Pau Farràs, Eduardo C. Escudero-Adán, Clara Viñas, Francesc Teixidor

Abstract

A fine control of the pirouetting motion of rotaxanes was achieved by using a series of metallabisdicarbollides. The latter were used as anions in the protonated form of benzylic amide macrocycle-containing fumaramide rotaxanes. The present paper discusses the synthesis and the structural and dynamic characterizations of the first examples of anionic boron cluster-containing rotaxanes. To study the dynamic properties of such molecules, the pirouetting rate of the weakly coordinating boron cluster-containing rotaxanes with the more strongly coordinating trifluoroacetate anion (TFA(-)), which would form a close ion pair with the macrocycle, was measured using the exchange spectroscopy NMR technique. Our hypothesis was that the stronger the ion pair the lower the rate of rotation due to the presence of a bigger volume of solvent to be moved. The anion would act as an anchor for the pirouetting motion. Indeed, the results show the expected trend: the rotaxane with the closely coordinating TFA(-) anion pirouettes most slowly, and the most weakly coordinating hexabromoderivative of cobaltabisdicarbollide pirouettes the fastest.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Spain 1 6%
Unknown 16 94%

Demographic breakdown

Readers by professional status Count As %
Professor 3 18%
Student > Bachelor 3 18%
Student > Ph. D. Student 2 12%
Professor > Associate Professor 2 12%
Lecturer 2 12%
Other 5 29%
Readers by discipline Count As %
Chemistry 14 82%
Biochemistry, Genetics and Molecular Biology 1 6%
Unspecified 1 6%
Materials Science 1 6%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 July 2014.
All research outputs
#3,037,835
of 4,507,778 outputs
Outputs from Inorganic Chemistry
#2,343
of 5,999 outputs
Outputs of similar age
#71,557
of 109,473 outputs
Outputs of similar age from Inorganic Chemistry
#234
of 371 outputs
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We're also able to compare this research output to 371 others from the same source and published within six weeks on either side of this one. This one is in the 6th percentile – i.e., 6% of its contemporaries scored the same or lower than it.