The sensitivity of donor - Acceptor charge transfer to molecular geometry in DAN - NDI based supramolecular flower-like self-assemblies

Al Kobaisi, M, Bhosale, R, El-Khouly, M, La, D, Padghan, S, Bhosale, S, Jones, L, Antolasic, F, Fukuzumi, S and Bhosale, S 2017, 'The sensitivity of donor - Acceptor charge transfer to molecular geometry in DAN - NDI based supramolecular flower-like self-assemblies', Scientific Reports, vol. 7, no. 1, pp. 1-11.


Document type: Journal Article
Collection: Journal Articles

Title The sensitivity of donor - Acceptor charge transfer to molecular geometry in DAN - NDI based supramolecular flower-like self-assemblies
Author(s) Al Kobaisi, M
Bhosale, R
El-Khouly, M
La, D
Padghan, S
Bhosale, S
Jones, L
Antolasic, F
Fukuzumi, S
Bhosale, S
Year 2017
Journal name Scientific Reports
Volume number 7
Issue number 1
Start page 1
End page 11
Total pages 11
Publisher Nature
Abstract A charge-transfer (CT) complex self-assembled from an electron acceptor (NDI-EA: naphthalene diimide with appended diamine) and an electron donor (DAN: phosphonic acid-appended dialkoxynapthalene) in aqueous medium. The aromatic core of the NDI and the structure of DAN1 were designed to optimize the dispersive interactions (π-π and van der Waals interactions) in the DAN1-NDI-EA self-assembly, while the amino groups of NDI also interact with the phosphonic acid of DAN1 via electrostatic forces. This arrangement prevented crystallization and favored the directional growth of 3D flower nanostructures. This molecular geometry that is necessary for charge transfer to occur was further evidenced by using a mismatching DAN2 structure. The flower-shaped assembly was visualized by scanning electron and transmission electron microscopy. The formation of the CT complex was determined by UV-vis and cyclic voltammetry and the photoinduced electron transfer to produce the radical ion pair was examined by femtosecond laser transient absorption spectroscopic measurements.
Subject Composite and Hybrid Materials
Physical Chemistry of Materials
Biomaterials
Keyword(s) photoinduced electron-transfer
naphthalene diimide
supra-amphiphiles
chromophores
nanostructures
environments
nanofibers
nanosheets
complexes
stacking
DOI - identifier 10.1038/s41598-017-15599-9
Copyright notice © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License
ISSN 2045-2322
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