Two-Photon-Induced Photoisomerization of an Azo Dye

Magennis, Steven W.; Mackay, Fiona; Jones, Anita C.; Tait, Katrina M.; Sadler, Peter J.

doi:10.1021/cm048020d

Cited by 58 publications

(41 citation statements)

References 36 publications

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“…They also examined two-photon photochromic reaction of 5 in solution with femtosecond pulses at 820 nm. In the same year, Magennis also reported the two-photon photochromism in an azo dye (Scheme 10) [43]. The cis-trans photoisomerization of the commercially available azo dye in DMSO was induced by two-photon excitation employing femtosecond pulses.…”

Section: Scheme 8 Photoisomerization Of Indolylfulgidementioning

confidence: 98%

Two-Photon Absorbing Molecules as Potential Materials for 3D Optical Memory

Ogawa

2014

Applied Sciences

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Abstract:In this review, recent advances in two-photon absorbing photochromic molecules, as potential materials for 3D optical memory, are presented. The investigations introduced in this review indicate that 3D data storage processing at the molecular level is possible. As 3D memory using two-photon absorption allows advantages over existing systems, the use of two-photon absorbing photochromic molecules is preferable. Although there are some photochromic molecules with good properties for memory, in most cases, the two-photon absorption efficiency is not high. Photochromic molecules with high two-photon absorption efficiency are desired. Recently, molecules having much larger two-photon absorption cross sections over 10,000 GM (GM= 10 ) have been discovered and are expected to open the way to realize two-photon absorption 3D data storage.

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Section: Scheme 8 Photoisomerization Of Indolylfulgidementioning

confidence: 98%

Two-Photon Absorbing Molecules as Potential Materials for 3D Optical Memory

Ogawa

2014

Applied Sciences

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“…Aiming at applications in data storage devices, polymeric materials doped with azochromophores, presenting photoinduced birefringence, have been produced [4][5][6][7][8]. In such case, the guest-host strategy adopted to incorporate the azochromophore into the polymer led to low residual birefringence due to the high mobility of the chromophore in the polymeric matrix [9,10].…”

Section: Introductionmentioning

confidence: 99%

Birefringent microstructures fabricated by two-photon polymerization containing an azopolymer

Tribuzi¹,

Fonseca²,

Corrêa³

et al. 2012

Opt. Mater. Express

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Birefringent materials have many applications in optical devices. An approach to obtain optically induced birefringence is to employ a guesthost strategy, using a polymer matrix containing an azodye. However, such method normally leads to low residual birefringence. Therefore, methodologies to produce microstructures with optimized birefringence are still on demand. Here we report on the fabrication, using two-photon polymerization, and characterization of birefringent microstructures produced in a polymer blend containing an azopolymer. Such microstructures present good structural integrity and residual birefringence of approximately 35 percent, depending on the sample formulation used, which indicates this approach for the fabrication of microoptical devices. O. N. Oliveira, "Mixed Langmuir and Langmuir-Blodgett films of disperse red-13 dye-derivatized methacrylic homopolymer and cadmium stearate," Langmuir 14(13), 3614-3619 (1998).

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“…Thus absorption spectroscopy can be conveniently used to measure the cis fraction in the steady state Fischer, 1967), and the subsequent thermal relaxation to an all-trans state (Beltrame et al, 1993;Hair et al, 1990;Eisenbach, 1980a;Gabor and Fischer, 1971). Nuclear magnetic resonance (NMR) spectroscopy can also be used (Magennis et al, 2005). Under moderate irradiation, the composition of the photostationary state is predominantly cis for azobenzenes, mixed for aminoazobenzenes, and predominantly trans for pseudo-stilbenes.…”

Section: Introduction To Azobenzenementioning

confidence: 99%