Optical properties and dynamics of a photochromic bisthienylethene in solution and in a polymer film

Owrutsky, J. C.; Nelson, H. H.; Baronavski, A. P.; Kim, O.-K.; Tsivgoulis, Gerasimos M.; Gilat, Sylvain L.; Lehn, Jean‐Maríe

doi:10.1016/s0009-2614(98)00816-1

Cited by 46 publications

(44 citation statements)

References 28 publications

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“…Even though technological applications will generally require the solid state, the majority of ultrafast studies have been carried out in solution, with the general consensus that the cyclization occurs on sub-picosecond to picoseconds timescales [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] . Though solution phase measurements have the advantage of continuously flowing the sample such that complete reversibility of initial conditions is ensured for every transient absorption (pump-probe) event, the periodic crystal structure and intermolecular contacts associated with the solid state will presumably have some effect on the reaction pathways.…”

Section: Methodsmentioning

confidence: 99%

“…Previous studies which employed femtosecond temporal resolution in the solution phase have obtained time constants associated with cyclization ranging from sub-ps to sub-3 ps for similar fluorinated diarylethene derivatives with heterocyclic aryl groups 7,9,10,14,16 . Here, the cyclization reaction in the crystalline phase is found to be significantly slower, presumably due to the impeding influence of the close-packed environment.…”

Section: Picosecond Dynamicsmentioning

confidence: 99%

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Femtosecond Dynamics of the Ring Closing Process of Diarylethene: A Case Study of Electrocyclic Reactions in Photochromic Single Crystals

et al. 2011

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The cyclization reaction of the photochromic diarylethene derivative 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene was studied in its single crystal phase with femtosecond transient absorption spectroscopy. The transient absorption measurements were performed with a robust acquisition scheme that explicitly exploits the photoreversibility of the molecular system and monitors the reversibility conditions. The crystalline system demonstrated 3 × 10(4) repeatable cycles before significant degradation was observed. Immediately following photoexcitation, the excited state absorption associated with the open-ring conformation undergoes a large spectral shift with a time constant of approximately 200 fs. Following this evolution on the excited state potential energy surface, the ring closure occurs with a time constant of 5.3 ps, which is significantly slower than previously reported measurements for similar derivatives in the solution phase. Time resolved electron diffraction studies were used to further demonstrate the assignment of the transient absorption dynamics to the ring closing reaction. The mechanistic details of the ring closing are discussed in the context of prior computational work along with a vibrational mode analysis using density functional theory to give some insight into the primary motions involved in the ring closing reaction.

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Section: Methodsmentioning

confidence: 99%

Section: Picosecond Dynamicsmentioning

confidence: 99%

Femtosecond Dynamics of the Ring Closing Process of Diarylethene: A Case Study of Electrocyclic Reactions in Photochromic Single Crystals

et al. 2011

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“…The dynamics of the photochromic reactions of symmetrically substituted and unsubstituted diarlyethenes have been studied recently by fs-and ps-transient absorption spectroscopy [7][8][9][10][11][12][13] and time-constants of less than 12 ps down to 1:1 ps are reported. Possible applications of diarylethenes in functional photoswitchable systems discussed in the literature rely on the different extension of conjugation in the two isomeric forms.…”

Section: Introductionmentioning

confidence: 99%

Photocontrol on ultrafast excited state transfer processes

Hartschuh

Ramsteiner

Port

et al. 2004

Journal of Luminescence

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“…To be useful practically in all-optical switching, nonlinear media must simultaneously satisfy three main requirements: large nonlinear refractive index (n 2 ) at the operating wavelength; minimal absorption due to one or multiphoton absorption; and ultrafast nonlinear refractive index response and relaxation times. [1][2][3] Recently, many materials for optical switching devices have been reported, including inorganic and semiconductor materials, 4-6 multiple quantum wells, 7,8 liquid crystals, 9,10 organic compounds 11,12 and polymers. 13,14 In the present study, we chose erythrosine B based poly (methacrylate) films with different chain lengths of methytlene group as the sample, and investigated experimentally the optical switching and beam deflection effects of these polymers under a CW pump beam.…”

Section: Introductionmentioning

confidence: 99%

Optical Switching of Erythrosine B Based Poly (Methacrylate) Films

Hassan

2009

Mod. Phys. Lett. B

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Erythrosine B based poly (methacrylate) films with varying even number of methylene spacers have been prepared by the free radical polymerization method. All optical switching and beam deflection effects of polymer films have been investigated by using Nd:YAG laser (532 nm) as a pump beam and a He-Ne laser (632.8 nm) as a probe beam. The nonlinear refractive indices of polymer films are determined using the Z-scan technique. The optical switching and beam deflection effects are due to the change of the refractive index of polymer under the pump beam. The experimental results show that erythrosine B based poly (methacrylate) films have potential application in optical switching.

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Optical properties and dynamics of a photochromic bisthienylethene in solution and in a polymer film

Cited by 46 publications

References 28 publications

Femtosecond Dynamics of the Ring Closing Process of Diarylethene: A Case Study of Electrocyclic Reactions in Photochromic Single Crystals

Femtosecond Dynamics of the Ring Closing Process of Diarylethene: A Case Study of Electrocyclic Reactions in Photochromic Single Crystals

Photocontrol on ultrafast excited state transfer processes

Optical Switching of Erythrosine B Based Poly (Methacrylate) Films

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