Self-assembled superanions: Ionic capsules stabilized by polynuclear chromium(III) aqua cations

Alexander Drljaca; Michaele J. Hardie; Colin L. Raston; Leone Spiccia

doi:10.1002/(SICI)1521-3765(19990802)5:8<2295::AID-CHEM2295>3.0.CO;2-O

Self-assembled superanions: Ionic capsules stabilized by polynuclear chromium(III) aqua cations

Alexander Drljaca, Michaele J. Hardie, Colin L. Raston, Leone Spiccia

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

Aqueous solutions of sodium p-sulfonatocalix[4]arene and 18-crown-6 containing purified, polynuclear hydrolytic Cr^III cations [Cr₂(OH)₂(H₂O)₈]⁴⁺, [Cr₃(OH)₄(H₂O)₁₀]⁵⁺ or [Cr₄(OH)₆-(H₂O)₁₂]⁶⁺ (as their perchlorates) at about pH 2 afford crystalline, extensively hydrated complexes. These complexes contain the Cr^III complex cations and self-assembled globularlike superanions or ionic capsules [{Na⁺ ⊂ (18-crown-6)-(OH₂)₂} ⊂ {(p-sulfonatocalix[4]arene^4-)₂}]^7-, which are triply, doubly or singly protonated, respectively. The superanions possess a central sodium ion bound by a crown ether and two trans water molecules; this moiety is further shrouded by two calixarenes. The di-and trinuclear cations can be leached from the solid complexes by treatment with aqueous HClO₄, and the complex containing the tetranuclear species is selectively formed from a solution containing a mixture of the various polynuclear cations.

Original language	English
Pages (from-to)	2295-2299
Number of pages	5
Journal	Chemistry - A European Journal
Volume	5
Issue number	8
DOIs	https://doi.org/10.1002/(SICI)1521-3765(19990802)5:8<2295::AID-CHEM2295>3.0.CO;2-O
Publication status	Published - 1 Jan 1999
Externally published	Yes

Keywords

Calixarenes
Chromium
Ionic capsules
Polynuclear cations
Self-assembly
Supramolecular chemistry

Access to Document

10.1002/(SICI)1521-3765(19990802)5:8<2295::AID-CHEM2295>3.0.CO;2-OLicence: In Copyright

Cite this

@article{5315c735216542488e94acfe3117df97,

title = "Self-assembled superanions: Ionic capsules stabilized by polynuclear chromium(III) aqua cations",

abstract = "Aqueous solutions of sodium p-sulfonatocalix[4]arene and 18-crown-6 containing purified, polynuclear hydrolytic CrIII cations [Cr2(OH)2(H2O)8]4+, [Cr3(OH)4(H2O)10]5+ or [Cr4(OH)6-(H2O)12]6+ (as their perchlorates) at about pH 2 afford crystalline, extensively hydrated complexes. These complexes contain the CrIII complex cations and self-assembled globularlike superanions or ionic capsules [{Na+ ⊂ (18-crown-6)-(OH2)2} ⊂ {(p-sulfonatocalix[4]arene4-)2}]7-, which are triply, doubly or singly protonated, respectively. The superanions possess a central sodium ion bound by a crown ether and two trans water molecules; this moiety is further shrouded by two calixarenes. The di-and trinuclear cations can be leached from the solid complexes by treatment with aqueous HClO4, and the complex containing the tetranuclear species is selectively formed from a solution containing a mixture of the various polynuclear cations.",

keywords = "Calixarenes, Chromium, Ionic capsules, Polynuclear cations, Self-assembly, Supramolecular chemistry",

author = "Alexander Drljaca and Hardie, {Michaele J.} and Raston, {Colin L.} and Leone Spiccia",

year = "1999",

month = jan,

day = "1",

doi = "10.1002/(SICI)1521-3765(19990802)5:8<2295::AID-CHEM2295>3.0.CO;2-O",

language = "English",

volume = "5",

pages = "2295--2299",

journal = "Chemistry - A European Journal",

issn = "0947-6539",

publisher = "John Wiley & Sons, Inc",

number = "8",

}

TY - JOUR

T1 - Self-assembled superanions

T2 - Ionic capsules stabilized by polynuclear chromium(III) aqua cations

AU - Drljaca, Alexander

AU - Hardie, Michaele J.

AU - Raston, Colin L.

AU - Spiccia, Leone

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Aqueous solutions of sodium p-sulfonatocalix[4]arene and 18-crown-6 containing purified, polynuclear hydrolytic CrIII cations [Cr2(OH)2(H2O)8]4+, [Cr3(OH)4(H2O)10]5+ or [Cr4(OH)6-(H2O)12]6+ (as their perchlorates) at about pH 2 afford crystalline, extensively hydrated complexes. These complexes contain the CrIII complex cations and self-assembled globularlike superanions or ionic capsules [{Na+ ⊂ (18-crown-6)-(OH2)2} ⊂ {(p-sulfonatocalix[4]arene4-)2}]7-, which are triply, doubly or singly protonated, respectively. The superanions possess a central sodium ion bound by a crown ether and two trans water molecules; this moiety is further shrouded by two calixarenes. The di-and trinuclear cations can be leached from the solid complexes by treatment with aqueous HClO4, and the complex containing the tetranuclear species is selectively formed from a solution containing a mixture of the various polynuclear cations.

AB - Aqueous solutions of sodium p-sulfonatocalix[4]arene and 18-crown-6 containing purified, polynuclear hydrolytic CrIII cations [Cr2(OH)2(H2O)8]4+, [Cr3(OH)4(H2O)10]5+ or [Cr4(OH)6-(H2O)12]6+ (as their perchlorates) at about pH 2 afford crystalline, extensively hydrated complexes. These complexes contain the CrIII complex cations and self-assembled globularlike superanions or ionic capsules [{Na+ ⊂ (18-crown-6)-(OH2)2} ⊂ {(p-sulfonatocalix[4]arene4-)2}]7-, which are triply, doubly or singly protonated, respectively. The superanions possess a central sodium ion bound by a crown ether and two trans water molecules; this moiety is further shrouded by two calixarenes. The di-and trinuclear cations can be leached from the solid complexes by treatment with aqueous HClO4, and the complex containing the tetranuclear species is selectively formed from a solution containing a mixture of the various polynuclear cations.

KW - Calixarenes

KW - Chromium

KW - Ionic capsules

KW - Polynuclear cations

KW - Self-assembly

KW - Supramolecular chemistry

UR - http://www.scopus.com/inward/record.url?scp=0032839020&partnerID=8YFLogxK

U2 - 10.1002/(SICI)1521-3765(19990802)5:8<2295::AID-CHEM2295>3.0.CO;2-O

DO - 10.1002/(SICI)1521-3765(19990802)5:8<2295::AID-CHEM2295>3.0.CO;2-O

M3 - Article

AN - SCOPUS:0032839020

SN - 0947-6539

VL - 5

SP - 2295

EP - 2299

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 8

ER -

Self-assembled superanions: Ionic capsules stabilized by polynuclear chromium(III) aqua cations

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this