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
Direct Observation of a Dark State in the Photocycle of a Light-Driven Molecular Motor
Saeed Amirjalayer,Saeed Amirjalayer,Arjen Cnossen,Wesley R. Browne,Ben L. Feringa,Wybren Jan Buma,Sander Woutersen +6 more
TL;DR: The transient IR vibrational fingerprints observed in the studies allow for an unambiguous identification of the identity of the "dark" electronic excited state from which the photon's energy is converted into motion, and thereby pave the way for tuning the quantum yield of future molecular rotors based on this structural motif.
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Kinetics of thermal cis–trans isomerization in a phototropic azobenzene-based single-component liquid crystal in its nematic and isotropic phases
TL;DR: The results demonstrate that the thermal back reaction depends on the phase and molecular environment of the cis-isomer, and the effect of temperature on the absorption spectra of 6-AB-O1 in its isotropic, nematic and crystalline phases is examined.
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Electrochemical dehydrogenation of hydrazines to azo compounds
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Journal ArticleDOI
Structural development studies of PPARs ligands based on tyrosine scaffold.
Barbara De Filippis,Pasquale Linciano,Alessandra Ammazzalorso,Carmen Di Giovanni,Marialuigia Fantacuzzi,Letizia Giampietro,Antonio Laghezza,Cristina Maccallini,Paolo Tortorella,Antonio Lavecchia,Fulvio Loiodice,Rosa Amoroso +11 more
TL;DR: Novel analogs were synthesized starting from tyrosine and evaluated as PPAR agonists, providing potent and selective PPARγ agonists and molecular docking studies performed on these new compounds complemented the experimental results and allowed some insights into the nature of binding of the ligands.
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Single-Molecule Junction: A Reliable Platform for Monitoring Molecular Physical and Chemical Processes.
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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.
Journal ArticleDOI
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.