Journal ArticleDOI
Photoisomerization in different classes of azobenzene
TLDR
This critical review details the studies completed to date on the 3 main classes of azobenzene derivatives and explains the mechanism behind the isomerization mechanism.Abstract:
Azobenzene undergoes trans → cisisomerization when irradiated with light tuned to an appropriate wavelength. The reverse cis →transisomerization can be driven by light or occurs thermally in the dark. Azobenzene's photochromatic properties make it an ideal component of numerous molecular devices and functional materials. Despite the abundance of application-driven research, azobenzene photochemistry and the isomerization mechanism remain topics of investigation. Additional substituents on the azobenzene ring system change the spectroscopic properties and isomerization mechanism. This critical review details the studies completed to date on the 3 main classes of azobenzene derivatives. Understanding the differences in photochemistry, which originate from substitution, is imperative in exploiting azobenzene in the desired applications.read more
Citations
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Journal ArticleDOI
Combining Meyer-Miller Hamiltonian with electronic structure methods for on-the-fly nonadiabatic dynamics simulations: implementation and application
TL;DR: The MM/SQC method combined with electronic structure calculations at the level of OM2/MRCI and the on-the-fly nonadiabatic dynamics simulations of cis-azobenzene is implemented to reproduce the experimental results and provides an alternative to the conventional surface hopping simulations.
Journal ArticleDOI
New bent-shaped azomethine monomers for optical applications
Valeriia Ovdenko,Aleksey Kolendo +1 more
TL;DR: In this article, the effect of large azomethine fragment on the process of homopolymerization was studied and the kinetic of its thermally initiated radical polymerization in DMF solution was compared with the kinetics of model compounds does not contain bulky photochromic fragment.
Journal ArticleDOI
Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core
Hoda A. Ahmed,Muna S. Khushaim +1 more
TL;DR: In this paper, a laterally CH3-substituted series of 1:2 hydrogen-bonded supramolecular complexes (HBSMCs) based on flexible acid core were prepared and mesomorphically investigated.
Journal ArticleDOI
Charge Transfer Driven Structural Relaxation in a Push–Pull Azobenzene Dye–Semiconductor Complex
TL;DR: A quantum-classical self-consistent approach that incorporates nonadiabatic excited-state electronic quantum dynamics into molecular mechanics is used to study the photoexcited dynamics of the push-pull azo-compound para-Methyl Red in the gas phase and sensitizing the (101) anatase surface of TiO2.
Journal ArticleDOI
Complex frequency-dependent polarizability through the π → π* excitation energy of azobenzene molecules by a combined charge-transfer and point-dipole interaction model
TL;DR: The CT/PDI model is fully capable to reproduce the static polarizability as well as the π → π* excitation energy for azobenzene compounds, and time-dependent density functional theory calculations of the frequency-dependent polarIZability extended with excited-state lifetimes to include also its imaginary part are adopted.
References
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Journal ArticleDOI
Photomechanics: directed bending of a polymer film by light.
TL;DR: It is shown that a single film of a liquid-crystal network containing an azobenzene chromophore can be repeatedly and precisely bent along any chosen direction by using linearly polarized light.
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Light-driven motion of liquids on a photoresponsive surface
TL;DR: The light-driven motion of a fluid substance in a surface-modified glass tube suggests potential applicability to microscale chemical process systems.
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Design and synthesis of chromophores and polymers for electro-optic and photorefractive applications
TL;DR: The ability of nonlinear optical materials to transmit, process and store information forms the basis of emerging optoelectronic and photonic technologies as discussed by the authors, where organic chromophore-containing polymers, in which the refractive index can be controlled by light or an electric field, are expected to play an important role.
Journal ArticleDOI
Ultrafast Dynamics of Photochromic Systems.
Naoto Tamai,Hiroshi Miyasaka +1 more
TL;DR: Reaction dynamics of the photochromic systems such as spiropyran, flugide and diarylethene derivatives in femto- to nano-second time region was reviewed and mechanisms of rapid reaction channels in various phases were discussed.