Self-organization of K +-crown ether derivatives into double-columnar arrays controlled by supramolecular isomers of hydrogen-bonded anionic biimidazolate Ni complexes

Makoto Tadokoro, Kyosuke Isoda, Yasuko Tanaka, Yuko Kaneko, Syoko Yamamoto, Tomoaki Sugaya, Kazuhiro Nakasuji

Research output: Contribution to journalArticle

Abstract

Anionic tris (biimidazolate) nickelate (II) ([Ni(Hbim) 3] -), which is a hydrogen-bonding (H-bonding) molecular building block, undergoes self-organization into honeycomb-sheet superstructures connected by complementary intermolecular H-bonds. The crystal obtained from the stacking of these sheets is assembled into channel frameworks, approximately 2 nm wide, that clathrate two cationic K +-crown ether derivatives organised into one-dimensional (1D) double-columnar arrays. In this study, we have shown that all five cationic guest-included crystals form nanochannel structures that clathrate the 1-D double-columnar arrays of one of the four types of K +-crown ether derivatives, one of which induces a polymorph. This is accomplished by adaptably fitting two types of anionic [Ni(Hbim) 3] - host arrays. One is a Δ Λ Δ Λ Δ Λ network with H-bonded linkages alternating between the two different optical isomers of the Δ and Λ types with flexible H-bonded [Ni(Hbim) 3] -. The other is a Δ Δ Δ Λ Λ Λ network of a racemate with 1-D H-bonded arrays of the same optical isomer for each type. Thus, [Ni(Hbim) 3] - can assemble large cations such as K + crown-ether derivatives into double-columnar arrays by highly recognizing flexible H-bonding arrangements with two host networks of Δ Λ Δ Λ Δ Λ and Δ Δ Δ Λ Λ Λ .

Original languageEnglish
Article number216050
JournalJournal of Nanotechnology
DOIs
Publication statusPublished - 2012
Externally publishedYes

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Crown Ethers
Crown ethers
Isomers
Hydrogen
Derivatives
Hydrogen bonds
Crystals
Polymorphism
Cations
Positive ions

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Self-organization of K +-crown ether derivatives into double-columnar arrays controlled by supramolecular isomers of hydrogen-bonded anionic biimidazolate Ni complexes. / Tadokoro, Makoto; Isoda, Kyosuke; Tanaka, Yasuko; Kaneko, Yuko; Yamamoto, Syoko; Sugaya, Tomoaki; Nakasuji, Kazuhiro.

In: Journal of Nanotechnology, 2012.

Research output: Contribution to journalArticle

Tadokoro, Makoto ; Isoda, Kyosuke ; Tanaka, Yasuko ; Kaneko, Yuko ; Yamamoto, Syoko ; Sugaya, Tomoaki ; Nakasuji, Kazuhiro. / Self-organization of K +-crown ether derivatives into double-columnar arrays controlled by supramolecular isomers of hydrogen-bonded anionic biimidazolate Ni complexes. In: Journal of Nanotechnology. 2012.
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abstract = "Anionic tris (biimidazolate) nickelate (II) ([Ni(Hbim) 3] -), which is a hydrogen-bonding (H-bonding) molecular building block, undergoes self-organization into honeycomb-sheet superstructures connected by complementary intermolecular H-bonds. The crystal obtained from the stacking of these sheets is assembled into channel frameworks, approximately 2 nm wide, that clathrate two cationic K +-crown ether derivatives organised into one-dimensional (1D) double-columnar arrays. In this study, we have shown that all five cationic guest-included crystals form nanochannel structures that clathrate the 1-D double-columnar arrays of one of the four types of K +-crown ether derivatives, one of which induces a polymorph. This is accomplished by adaptably fitting two types of anionic [Ni(Hbim) 3] - host arrays. One is a Δ Λ Δ Λ Δ Λ network with H-bonded linkages alternating between the two different optical isomers of the Δ and Λ types with flexible H-bonded [Ni(Hbim) 3] -. The other is a Δ Δ Δ Λ Λ Λ network of a racemate with 1-D H-bonded arrays of the same optical isomer for each type. Thus, [Ni(Hbim) 3] - can assemble large cations such as K + crown-ether derivatives into double-columnar arrays by highly recognizing flexible H-bonding arrangements with two host networks of Δ Λ Δ Λ Δ Λ and Δ Δ Δ Λ Λ Λ .",
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