Highly Cooperative Binding of Ion‐Pair Dimers and Ion Quartets by a Bis(calix[4]pyrrole) Macrotricyclic Receptor

Valderrey, Virginia; Escudero‐Adán, Eduardo C.; Ballester, Pedro J.

doi:10.1002/ange.201302524

Cited by 8 publications

(1 citation statement)

References 20 publications

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“…In recent work by Valderrey et al, 42 a bis(calix [4]pyrrole) receptor 90 ( Figure 28) was shown to form an unprecedented five-component complex by the combination of cascade contact ion-pair binding modes. The addition of 2 equiv of tetrabutylammonium cyanate (TBA + NCO À ) resulted in the formation of a cascade complex with two NCO À anions bound to the calix [4]pyrrole anion-binding sites and one TBA + cation sandwiched between forming contact ion-pair interactions.…”

Section: Ion-pair Bindingmentioning

confidence: 98%

Anion Receptor Chemistry

Gale

Howe

2016

Chem

383

228

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Section: Ion-pair Bindingmentioning

confidence: 98%

Anion Receptor Chemistry

Gale

Howe

2016

Chem

383

228

View full text Add to dashboard Cite

Ion and Molecular Recognition Using Aryl–Ethynyl Scaffolding

Vonnegut

Tresca

Johnson

et al. 2015

Chemistry An Asian Journal

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The aryl–ethynyl linkage has been extensively employed in the construction of hosts for a variety of guests. Uses range from ion detection (e.g., of metal cations in the environment or industrial waste and of anions prevalent in nature), to molecular mimics for biological systems, and to applications targeting future safety issues (such as CO2 capture and indicators for the manufacture of chemical weapons). This Focus Review examines the utilization of the aryl–ethynyl linkage in engineering host molecules for a variety of different guests, and how the alkyne unit plays an integral part as both a rigid scaffolding section in host geometry design as well as a linker to allow conjugative communication between discrete π-electron systems.

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Alkaline‐Earth Metal Cations as Structure Building Blocks for Molecular Cages with Entrapment and Controlled Release of Quintuple Ionic Aggregates

Wang

Shiu

2015

Chemistry A European J

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Currently, main-group metal cations are totally neglected as the structure-building blocks for the self-assembly of supramolecular coordination metallocages due to the lack of directional bonding. However, here we show that a common Arrhenius acid-base neutralization allows the alkaline-earth metal cations to act as charged binders, easily connecting two or more highly directional anionic transition-metal-based metalloligands to coordination polymers. With a metal salt such as K(+) PF6 (-) added during the neutralization, the main-group metal-connected skeleton can be templated by the largest yet reported ionic-aggregate anion, K2 (PF6 )3 (-) , formed from KPF6 in solution, into molecular metallocages, encapsulating the ion. Crystal-structure details, DFT-calculation results, and controlled-release behavior support the presence of K2 (PF6 )3 (-) as a guest in the cage. Upon removal of PF6 (-) ions, the cage stays intact. Other ions like BF4 (-) can be put back in.

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Highly Cooperative Binding of Ion‐Pair Dimers and Ion Quartets by a Bis(calix[4]pyrrole) Macrotricyclic Receptor

Abstract: Vier verbindet: Ein makrotricyclischer Rezeptor mit zwei konvergenten Calix[4]pyrrol‐Einheiten zeichnet sich durch die ungewöhnliche Bindung zweier Ionenpaare aus. Im Fall von Tetrabutylammonium(TBA)‐Salzen werden die Paare hoch kooperativ gebunden. MTOA=Methyltrioctylammonium.

Cited by 8 publications

References 20 publications

Anion Receptor Chemistry

Anion Receptor Chemistry

Ion and Molecular Recognition Using Aryl–Ethynyl Scaffolding

Alkaline‐Earth Metal Cations as Structure Building Blocks for Molecular Cages with Entrapment and Controlled Release of Quintuple Ionic Aggregates

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