Femtosecond reaction dynamics of a photochromic dithienylethene derivative

Ern, J.; Bens, Arthur Thomas; Martin, Hans‐Dieter; Mukamel, Shaul; Schmid, Dirk; Tretiak, Sergei; Tsiper, E. V.; Kryschi, Carola

doi:10.1016/s0022-2313(99)00382-8

Cited by 37 publications

(57 citation statements)

References 8 publications

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“…In that description the optical and conduction gap coincide and the first excited state mimics the HOMO-LUMO gap. The ground state and excited state profiles shown here are very similar to the results obtained by Ern et al [23] using a different method. In Fig.…”

supporting

confidence: 90%

One-Way Optoelectronic Switching of Photochromic Molecules on Gold

et al. 2003

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We investigate photochromic molecular switches that are self-assembled on gold. We use two experimental techniques; namely, the mechanically controllable break-junction technique to measure electronic transport, and UV/Vis spectroscopy to measure absorption. We observe switching of the molecules from the conducting to the insulating state when illuminated with visible light (lambda=546 nm), in spite of the gold surface plasmon absorption present around this wavelength. However, we fail to observe the reverse process which should occur upon illumination with UV light (lambda=313 nm). We attribute this to quenching of the excited state of the molecule in the open form by the presence of gold.

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supporting

confidence: 90%

One-Way Optoelectronic Switching of Photochromic Molecules on Gold

et al. 2003

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“…Semiempirical Hamiltonian INDO/S in combination with coupled electronic oscillator formalism was used by Tretiak and coworkers 45, 46 to study the excited state dynamics for electrocyclic reactions in diarylethene derivatives. They were able to explain the slow conversion of the precursor for the ring opening process that corresponds to the pericyclic minimum on the excited state potential surface into the ground‐state products by the presence of the potential barrier separating this minimum from a CIX to the ground state 47.…”

Section: Theorymentioning

confidence: 99%

Theoretical study of photochromic compounds, part 2: Thermal mechanism for byproduct formation and fatigue resistance of diarylethenes used as data storage materials

Patel

Михайлов

Belfield

et al. 2009

Int J of Quantum Chemistry

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ABSTRACT:Certain organic compounds possess the ability to change color under the influence of light, called photochromism. This change is due to ultrafast chemical transition from open to closed ring isomers (photocyclization), which can be used for optical data storage and photoswitching applications. These applications require minimization of the irreversible photodegradation of the material, called photofatigue. This property is related to the chemical rate of byproduct formation. We use density functional theory methods to predict the mechanism and activation barriers to the byproduct formation for 1,2-bis(2-methyl-5-phenyl-3-thienyl)perfluorocyclopentene in order to estimate its fatigue resistance. We also explain higher fatigue resistance for its methylated derivative. The methods used in this study may become a part of rational design strategy for the new photochromic materials.

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“…The bands at 392 and 331 nm are assigned to the S 0 → S 2 and S 0 → S 3 transitions, respectively. [25] Complex Ru(l-1o)Ru in acetonitrile is yellow. The UV-vis spectra of Ru(l-1o)Ru and Ru(l1c)Ru in this solvent are shown in Figure 2.…”

Section: Electronic Absorption and Emission Spectroscopic Propertiesmentioning

confidence: 99%

Photochromic Switches Incorporated in Bridging Ligands: A New Tool to Modulate Energy‐Transfer Processes

Belser

Cola

Hartl

et al. 2006

Adv Funct Materials

122

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The thoughful construction of molecular switches has led to a gamut of supramolecular systems that can be used in molecular electronics. These include molecules based on thienylethenes, spiropyrans, fulgides, dithienylphenanthrolines, and diazafluorenes. This article reviews the recent developments made in the synthesis and characterization of all these systems, thereby allowing a comparative study to validate the viability of these switchable molecules on a nanoscale. Also, the drawbacks of each class are demonstrated and, at the same time, the remedies for further improvisation are prescribed. We have made an honest attempt to present an exhaustive account of all the different photochromic switches developed by us hitherto.

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Femtosecond reaction dynamics of a photochromic dithienylethene derivative

Cited by 37 publications

References 8 publications

One-Way Optoelectronic Switching of Photochromic Molecules on Gold

One-Way Optoelectronic Switching of Photochromic Molecules on Gold

Theoretical study of photochromic compounds, part 2: Thermal mechanism for byproduct formation and fatigue resistance of diarylethenes used as data storage materials

Photochromic Switches Incorporated in Bridging Ligands: A New Tool to Modulate Energy‐Transfer Processes

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