Studies on [3]pseudorotaxane formation from a bis-azacrown derivative as host and imidazolium ion-derivatives as guest

Mandal, Amal Kumar ; Suresh, Moorthy ; Das, Amitava (2011) Studies on [3]pseudorotaxane formation from a bis-azacrown derivative as host and imidazolium ion-derivatives as guest Organic and Biomolecular Chemistry, 9 (13). pp. 4811-4817. ISSN 1477-0520

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Official URL: http://pubs.rsc.org/en/content/articlelanding/2011...

Related URL: http://dx.doi.org/10.1039/C0OB01106A

Abstract

A new host molecule, having two azacrown derivatives bridged by luminescent naphthalene diimide functionality, is found to form a [3]pseudorotaxane derivative with imidazolim ion-based guest molecules in non-polar solvents through hydrogen-bonded adduct formation. Depending upon the length of the covalent linker that links the imidazolium ion and the luminescent naphthalene fragment in the guests, the [3]pseudorotaxane adducts adopt different conformation or orientation with varying π-π/donor-acceptor interaction. The mechanism for the naphthalene-based luminescence quenching by NDI fragment on adduct formation was found to be a combination of static, as well as dynamic with static quenching as the dominant one.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry.
ID Code:59986
Deposited On:08 Sep 2011 10:24
Last Modified:08 Sep 2011 10:24

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