Organometallic Receptors for Charged and Neutral Guest Species

Hein, Robert; Beer, Paul D.

doi:10.1016/b978-0-12-820206-7.00132-3

Cited by 2 publications

(2 citation statements)

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“…Their typically modular synthesis and bright, highly tuneable emission profiles renders them potent motifs in optical ion sensors. 109 This has been exploited in a range of XB fluorescent anion sensors, an early example of which is the neutral, bimetallic pyrimidine-(iodo)triazole 7.XB/HB system containing Re( i ) carbonyl reporter groups ( Fig. 12 ).…”

Section: Optical Sensorsmentioning

confidence: 99%

Halogen bonding and chalcogen bonding mediated sensing

Hein

Beer

2022

Chem. Sci.

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Section: Optical Sensorsmentioning

confidence: 99%

Halogen bonding and chalcogen bonding mediated sensing

Hein

Beer

2022

Chem. Sci.

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“…Having established the general utility of (reductive) redox-controlled ChB in simple telluroviologens, our attention focused on a further elaboration of this concept in the more advanced anion receptor scaffold 2.Te . The ChB potency of this natively neutral receptor can be reversibly switched-ON by redox control of the ferrocene/ferrocenium (Fc/Fc + ) couple, a more common, and arguably more useful approach for anion recognition and sensing, circumventing the isolation of charged compounds. ,,,, …”

Section: Results and Discussionmentioning

confidence: 84%

Redox-Switchable Chalcogen Bonding for Anion Recognition and Sensing

Hein

Docker

Davis³

et al. 2022

J. Am. Chem. Soc.

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Inspired by the success of its related sigma-hole congener halogen bonding (XB), chalcogen bonding (ChB) is emerging as a powerful noncovalent interaction with a plethora of applications in supramolecular chemistry and beyond. Despite its increasing importance, the judicious modulation of ChB donor strength remains a formidable challenge. Herein, we present, for the first time, the reversible and large-scale modulation of ChB potency by electrochemical redox control. This is exemplified by both the switching-ON of anion recognition via ChB oxidative activation of a novel bis(ferrocenyltellurotriazole) anion host and switching-OFF reductive ChB deactivation of anion binding potency with a telluroviologen receptor. The direct linking of the redox-active center and ChB receptor donor sites enables strong coupling, which is reflected by up to a remarkable 3 orders of magnitude modulation of anion binding strength. This is demonstrated through large voltammetric perturbations of the respective receptor ferrocene and viologen redox couples, enabling, for the first time, ChB-mediated electrochemical anion sensing. The sensors not only display significant anion-binding-induced electrochemical responses in competitive aqueous-organic solvent systems but can compete with, or even outperform similar, highly potent XB and HB sensors. These observations serve to highlight a unique (redox) tunability of ChB and pave the way for further exploration of the reversible (redox) modulation of ChB in a wide range of applications, including anion sensors as well as molecular switches and machines.

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Organometallic Receptors for Charged and Neutral Guest Species

Cited by 2 publications

References 262 publications

Halogen bonding and chalcogen bonding mediated sensing

Halogen bonding and chalcogen bonding mediated sensing

Redox-Switchable Chalcogen Bonding for Anion Recognition and Sensing

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