Haldar, Ritesh ; Rahimi, Faruk Ahamed ; Hazra, Arpan ; Maji, Tapas Kumar (2021) Coordination driven self-assembly of donor-acceptor linkers in 3D supramolecular frameworks: Ground state charge transfer and tunable porosity Materials Research Bulletin, 142 . p. 111388. ISSN 0025-5408
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Official URL: http://doi.org/10.1016/j.materresbull.2021.111388
Related URL: http://dx.doi.org/10.1016/j.materresbull.2021.111388
Abstract
We report the synthesis, structural characterization and photophysical properties of two 3D supramolecular architectures formed by the coordination driven self-assembly of pyrene and Schiff base linkers, as a donor-acceptor (D-A) pair. The monotopic functionality of the pyrene (as pyrenemonocarboxylic acid and pyrenebutyric acid) and ditopic Schiff base with Cd2+ render 1D coordination polymers (CPs), which are interdigitated via non-covalent interactions to form 3D supramolecular frameworks. The pyrenemonocarboxylic acid containing CP forms a dense structure, while the pyrenebutyric acid containing CP is porous and dynamic, as confirmed by the gas and solvent vapour adsorption experiments. Structural insight from the X-ray crystal structures and photophysical characterizations of the CPs reveal that pyrene and Schiff base form a stable charge transfer (CT) state. The variable alkyl chain lengths of the pyrene linkers tune the porosity, however, allow strong π-π and C–H-π interactions among the D-A units rendering facile CT, as confirmed by EPR and DFT calculations.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
ID Code: | 123989 |
Deposited On: | 27 Oct 2021 04:54 |
Last Modified: | 27 Oct 2021 04:54 |
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