Optical Properties of DMA-π-DCV Derivatives: A Theoretical Inspection under the DFT Microscope
Author
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-11-01
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The optical properties of a series of donor-acceptor N,N-dimethylaniline-π-dicyanovinylene (DMA-π-DCV) chromophores have been investigated under the density functional theory framework.
Focus has been made on the low-lying charge-transfer (CT) electronic transitions for which experimental data is available.
The effect of the π-conjugated bridge length and type was analysed between the families of oligoene and oligoyne derivatives of increasing size.
Theoretical calculations demonstrate that the ethylene bridge is a better π-communicator and allows for more delocalized frontier molecular orbitals compared to the acetylene spacer.
The Λ diagnostic test allowed rationalization of the orbital spatial overlap in the main CT excitations.
The performance of different density functional rungs was assessed in the prediction of the lowest-lying CT electronic transition.
Surprisingly, most modern long-range corrected functionals demonstrated to provide among the largest errors, whereas hybrid functionals showed the best performance.
Solvatochromism was confirmed in both oligoene and oligoyne compounds.
A donor-acceptor-donor triad based on tetrathiafulvalene was utilised as a test system for the prediction of its two CT bands of different nature, energy, and intensity.
The hybrid PBE0 (or a similar hybrid analogue) consolidates as the best choice for the prediction of CT excitations in the DMA-π-DCV push-pull family.
American Psychological Association (APA)
Calbo, Joaquín. 2016. Optical Properties of DMA-π-DCV Derivatives: A Theoretical Inspection under the DFT Microscope. Journal of Spectroscopy،Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1110771
Modern Language Association (MLA)
Calbo, Joaquín. Optical Properties of DMA-π-DCV Derivatives: A Theoretical Inspection under the DFT Microscope. Journal of Spectroscopy No. 2016 (2016), pp.1-12.
https://search.emarefa.net/detail/BIM-1110771
American Medical Association (AMA)
Calbo, Joaquín. Optical Properties of DMA-π-DCV Derivatives: A Theoretical Inspection under the DFT Microscope. Journal of Spectroscopy. 2016. Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1110771
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1110771