title: Studies on [3]pseudorotaxane formation from a bis-azacrown derivative as host and imidazolium ion-derivatives as guest.
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.
authors.affiliation: Central Salt & Marine Chemicals Research Institute (CSIR), Bhavnagar: 364002, Gujarat, India.
authors.forename: Amal Kumar
authors.initials: AK
authors.lastname: Mandal
authors.forename: Moorthy
authors.initials: M
authors.lastname: Suresh
authors.forename: Amitava
authors.initials: A
authors.lastname: Das