Dual-wavelength photochromic fulgides for parallel recording memory

Chen, Yi; Xiao, Jun; Fan, Meigong

doi:10.1016/j.optmat.2005.06.006

Cited by 12 publications

(17 citation statements)

References 15 publications

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“…These unique properties made them useful in optical data storage devices and optical switches 10, 11. The photochromic fulgides/fulgimides were dispersed in the polymer systems to form thin films and studied 12–14. Conversely, Liang et al15 synthesized novel photochromic copolymers composed of photochromic 2‐indolyl fulgides/fulgimides and methyl methacrylates and reported the advantages of these materials to be used in optical switching and optical data storage devices.…”

Section: Introductionmentioning

confidence: 99%

Click chemistry‐assisted triazole‐substituted azobenzene and fulgimide units in the pendant‐based copoly(decyloxymethacrylate)s for dual‐mode optical switches

Saravanan

Subramanian

Kannan

2008

J. Polym. Sci. A Polym. Chem.

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Copolymer containing new thermally reversible click chemistry‐assisted triazole‐substituted azobenzene and fulgimide units in the pendant F‐co‐A was prepared by free‐radical solution addition polymerization technique. The F and A were also prepared for comparison. The DSC analysis of F indicates that the polymer possessing the C‐form of fulgimide unit exhibited higher Tm than that of E‐form of the same polymer and revealed that the C‐form of fulgimide unit in F is highly ordered. The cis‐trans back isomerization behavior of the click chemistry‐assisted triazole‐substituted azobenzene unit in film A has thermal irreversibility, while in F‐co‐A it exhibited thermal reversibility. The UV‐exposed film of F‐co‐A heated around Tg leads to cis‐trans back isomerization of azobenzene unit and thermally stable C‐form of fulgimide which retains its conjugated structure where both the photochromic units are converted into planar conformations and exhibit high fluorescence properties. The fluorescence maxima of C‐form in F‐co‐A red shifted compared with F, because the substituted triazole ring in the azobenzene unit stabilized the C‐form of fulgimide unit. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 7843–7860, 2008

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Section: Introductionmentioning

confidence: 99%

Click chemistry‐assisted triazole‐substituted azobenzene and fulgimide units in the pendant‐based copoly(decyloxymethacrylate)s for dual‐mode optical switches

Saravanan

Subramanian

Kannan

2008

J. Polym. Sci. A Polym. Chem.

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“…Changes of surface conductance, using a metallized AFM tip,21 and contact potential difference24 can also assess conformation switching. On a macroscopic scale, the switching of surfaces is frequently characterized by contact angle measurements19, 29, 38, 39 and more scarcely by monitoring optical properties in the UV‐Vis (refractive index,32, 38 reflectance,40 fluorescence,41 absorbance) 35, 42. Among spectroscopic techniques, surface enhanced Raman spectroscopy (SERS) or surface plasmon resonance (SPR)32, 43, 44 proved to be sensitive methods to monitor surface switching.…”

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confidence: 99%

Quantitative IR Readout of Fulgimide Monolayer Switching on Si(111) Surfaces

Villeneuve¹,

Michalik²,

Chazalviel³

et al. 2012

Advanced Materials

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Creating photoactive monolayers of photochromes is of considerable technological interest. This paper describes the construct of fulgimide monolayers on silicon surfaces and presents a quantitative IR analysis studies of their composition and switching properties. The scheme on top shows the structure of the starting C-form terminated Si(111) surface and the graph below sketches the surface composition at the photostationnary states under visisble and UV irradiation, as derived from in situ IR spectroscopy after several UV/vis irradiation cycles.

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“…5 The aromatic heterocyclic ring structures containing photochromic fulgides are excellent candidates; especially indolyl and oxazolyl fulgides have distinguished photochromic properties attributed to their high thermal stability, strong fluorescence and enhanced fatigue resistance compared to other fulgides. [6][7][8][9] The research articles regarding fulgides mainly focused on their thermal irreversibility, photofatigue resistance and high efficiency in a rapid photoconversion processes. The fulgide synthesis involves Stobbe condensation of carbonyl compounds with isopropylidene diethyl succinate followed by cyclization of fulgenic acid using DCC and acetyl chloride does not provide high yield of desired product, particularly when the reactants are highly substituted.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of photochromic fulgides

et al. 2010

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The oxazole and indole based heterocyclic photochromic fulgides were synthesized from their corresponding fulgenic acid derivatives by clay catalysed microwave irradiation methodology. Improved yields of fulgides were observed by the microwave irradiation method as compared other chemical methods employed so far. The proportions of clay (montmorillonite KSF) and isopropenyl acetate play a key role in increasing the yields of fulgides.

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Dual-wavelength photochromic fulgides for parallel recording memory

Cited by 12 publications

References 15 publications

Click chemistry‐assisted triazole‐substituted azobenzene and fulgimide units in the pendant‐based copoly(decyloxymethacrylate)s for dual‐mode optical switches

Click chemistry‐assisted triazole‐substituted azobenzene and fulgimide units in the pendant‐based copoly(decyloxymethacrylate)s for dual‐mode optical switches

Quantitative IR Readout of Fulgimide Monolayer Switching on Si(111) Surfaces

Microwave-assisted synthesis of photochromic fulgides

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