Thermodynamically self-assembling porphyrin-stoppered rotaxanes

MJ Gunter; N Bampos; KD Johnstone; JKM Sanders

doi:10.1039/b006911f

Thermodynamically self-assembling porphyrin-stoppered rotaxanes

MJ Gunter
, N Bampos
, KD Johnstone
, JKM Sanders

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

101 Citations (Scopus)

Abstract

A variety of porphyrin-stoppered rotaxanes has been assembled under conditions of thermodynamic reversibility by judicious choice of components and temperatures. An admixture of a thread unit comprising a central naphthodiimide with terminal pyridines (2a), a ring unit dinaphtho-38-crown-10 (1) and either ZnII (3a), RuII (CO) (3b) or RhIII I (3c) as stoppers was shown to form an equilibrating mixture of pseudorotaxanes and the porphyrin-stoppered rotaxanes. The intact rotaxane could be crystallised from solution and chromatographed at low temperatures; at higher temperatures only a mixture of the components separated on chromatography. 1H NMR revealed NOE correlations between all three components for the rotaxane, and exchange peaks for related free and complexed species.

Original language	English
Pages (from-to)	166-173
Journal	New Journal of Chemistry
Volume	25
DOIs	https://doi.org/10.1039/b006911f
Publication status	Published - 2001

Keywords

Nanochemistry and Supramolecular Chemistry

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https://hdl.handle.net/1959.11/150

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title = "Thermodynamically self-assembling porphyrin-stoppered rotaxanes",

abstract = "A variety of porphyrin-stoppered rotaxanes has been assembled under conditions of thermodynamic reversibility by judicious choice of components and temperatures. An admixture of a thread unit comprising a central naphthodiimide with terminal pyridines (2a), a ring unit dinaphtho-38-crown-10 (1) and either ZnII (3a), RuII (CO) (3b) or RhIII I (3c) as stoppers was shown to form an equilibrating mixture of pseudorotaxanes and the porphyrin-stoppered rotaxanes. The intact rotaxane could be crystallised from solution and chromatographed at low temperatures; at higher temperatures only a mixture of the components separated on chromatography. 1H NMR revealed NOE correlations between all three components for the rotaxane, and exchange peaks for related free and complexed species.",

keywords = "Nanochemistry and Supramolecular Chemistry",

author = "MJ Gunter and N Bampos and KD Johnstone and JKM Sanders",

year = "2001",

doi = "10.1039/b006911f",

language = "English",

volume = "25",

pages = "166--173",

journal = "New Journal of Chemistry",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Thermodynamically self-assembling porphyrin-stoppered rotaxanes

AU - Gunter, MJ

AU - Bampos, N

AU - Johnstone, KD

AU - Sanders, JKM

PY - 2001

Y1 - 2001

N2 - A variety of porphyrin-stoppered rotaxanes has been assembled under conditions of thermodynamic reversibility by judicious choice of components and temperatures. An admixture of a thread unit comprising a central naphthodiimide with terminal pyridines (2a), a ring unit dinaphtho-38-crown-10 (1) and either ZnII (3a), RuII (CO) (3b) or RhIII I (3c) as stoppers was shown to form an equilibrating mixture of pseudorotaxanes and the porphyrin-stoppered rotaxanes. The intact rotaxane could be crystallised from solution and chromatographed at low temperatures; at higher temperatures only a mixture of the components separated on chromatography. 1H NMR revealed NOE correlations between all three components for the rotaxane, and exchange peaks for related free and complexed species.

AB - A variety of porphyrin-stoppered rotaxanes has been assembled under conditions of thermodynamic reversibility by judicious choice of components and temperatures. An admixture of a thread unit comprising a central naphthodiimide with terminal pyridines (2a), a ring unit dinaphtho-38-crown-10 (1) and either ZnII (3a), RuII (CO) (3b) or RhIII I (3c) as stoppers was shown to form an equilibrating mixture of pseudorotaxanes and the porphyrin-stoppered rotaxanes. The intact rotaxane could be crystallised from solution and chromatographed at low temperatures; at higher temperatures only a mixture of the components separated on chromatography. 1H NMR revealed NOE correlations between all three components for the rotaxane, and exchange peaks for related free and complexed species.

KW - Nanochemistry and Supramolecular Chemistry

U2 - 10.1039/b006911f

DO - 10.1039/b006911f

M3 - Article

SN - 1144-0546

VL - 25

SP - 166

EP - 173

JO - New Journal of Chemistry

JF - New Journal of Chemistry

ER -

Thermodynamically self-assembling porphyrin-stoppered rotaxanes

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