Spiro-oxazine photochromic fiber optical switch

Huang, Yanyi; Liang, Wei; Poon, Joyce K. S.; Xu, Yong; Lee, Reginald K.; Yariv, Amnon

doi:10.1063/1.2200148

Cited by 25 publications

(24 citation statements)

References 19 publications

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“…The absorbance's values and bandwidth in the UV were similar, with an increase for concentration of 3%. Moreover, the absorbance in the visible range was almost the same with a low value which contradicted previous observations [12]. The most interesting results have been obtained for the sample containing spiropyran (Figure 4(b)).…”

Section: Absorbance Measurementscontrasting

confidence: 54%

“…Spirooxazine is considered as a promising material to act as a reliable sensor due to fast response time with good photo-fatigue resistance [12]. Previous works had focused on the liquid form of spirooxazine and spiropyran, when studying the photochromic reaction induced by UV irradiation [2].…”

Section: Introductionmentioning

confidence: 99%

“…They are organic compounds with a closed ring form (Figure 1), which change into an open ring form called merocyanine under UV exposure. Spirooxazine is colorless in its closed ring form and becomes blue [12] under UV irradiation (open ring form), and spiropyran is pale yellow in its closed ring form and becomes dark purple [14] in its open ring form (Figure 2). …”

Section: Introductionmentioning

confidence: 99%

“…For the last two decades, photochromic compounds have been intensively studied [2][3][4][5][6][7][8][9][10][11] for many applications such as optical switch [12], optical memory [13], ophthalmic lens and light filters [7]. This manuscript concentrates on the photophysical properties of 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3'-[3H]naphth [2,1-b] [1,4]oxazine] and 1',3'-dihydro-1',3',3'-trimethyl-6-nitro-spiro[2H-1-benzopyran-2,2'-(2H)-indole] also called spirooxazine and spiropyran respectively.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Bonefacino¹,

Tse²,

Pun³

et al. 2013

OPJ

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A characterization of photophysical properties of 1, 3-dihydro-1,3,3-compounds hosted in poly(methyl methacrylate) (PMMA) was carried out. The parameters which influenced the photochromic behavior of both compounds were investigated. After ultraviolet (UV) irradiation, it was demonstrated that the temperature was the dominant factor which influenced the deactivation of both materials. For spiropyran, it was demonstrated that the process could be photo-induced with a certain wavelength which we have specified in this manuscript. It was also found that X-Ray did not affect the photo physical properties of spirooxazine and spiropyran. Finally, both materials could be used as low-cost germicidal UV indicators.

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Section: Absorbance Measurementscontrasting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Bonefacino¹,

Tse²,

Pun³

et al. 2013

OPJ

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“…These include the ability to change absorption spectra and / or refractive index [8], modulating molecular fluorescence yield [9] and optically inducing structural changes in supramolecular complexes [10][11][12]. All these modifications are reversible via thermal back conversion or upon exposure to a light of different wavelength.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast dynamics of photochromic compound based on oxazine ring opening

Barkauskas¹

2008

Lithuanian J. Phys.

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We have performed a femtosecond pump-probe and nanosecond flash-photolysis measurements on a new type of photochromic molecules. These photochromes incorporate an indolo[2,1-b][1,3]benzoxazine ring system which opens upon UV light excitation and closes back within a few tens of ns. The details of ring opening and spectral properties of the photoproducts have been studied by investigating the spectral signatures of the model compounds representing separate structural parts of the photochromic switch. Comparison of the photoinduced dynamics of the model compounds and those of photochromic molecule has revealed a detailed molecular picture of the light-driven switch function.

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Hybrid Organic/Photochromic Approaches to Generate Multifunctional Materials, Interfaces, and Devices

Orgiu

Samorı́

2016

Photochromic Materials: Preparation, Properties and Applications

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Silicon industry's greatest strength has always relied on its ability to downscale device dimensions and generate low-cost functions regardless of the relatively high cost per area. Conversely, "van der Waals solids" relying on weak interactions such as organic semiconductors (OSs) have always been thought of complementing this requirement for low-cost production as well as large-area applications by virtue of their characteristic chemical versatility and easy processability. Hence, OSs hold a great potential for the integration in the everyday flexible electronics [1-22] as they feature a number of fundamental properties such as light emission , charge transport , and photovoltaic response .So far, synthetic pathways and processing of organic semiconductors have greatly improved and generated a variety of possible candidate molecules/ processes that are mature enough to meet the initially envisaged applications [97][98][99][100][101][102][103][104][105][106][107][108][109][110][111][112].Nevertheless, the initial desire for reducing the device size is ultimately getting to an end for the Si-based electronics because of the limitations coming from the photolithographic steps involved in the production process of the devices. In this regard, organic and polymer electronics, that is, the electronics based on organic and polymeric semiconductors, cannot complement its inorganic counterpart and the relentless need of miniaturization unless new challenging avenues are pursued.A new strategy can be envisaged in which molecular functions are integrated into organic semiconductors via a controlled combination with an additional molecular component featuring supplementary functions. This is the case of photochromic systems [113][114][115][116][117][118] that are small organic molecules capable of undergoing reversible isomerization upon light irradiation at definite wavelengths between (at least) two (meta)stable states exhibiting markedly different properties at the molecule level. In these molecular switches, the specific isomeric state is selected upon exposure to a light stimulus with a proper wavelength. The most common families of photochromic molecules, depicted in Figure 7.1, Photochromic Materials: Preparation, Properties and Applications, First Edition. Edited by He Tian and Junji Zhang.

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Spiro-oxazine photochromic fiber optical switch

Cited by 25 publications

References 19 publications

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Ultrafast dynamics of photochromic compound based on oxazine ring opening

Hybrid Organic/Photochromic Approaches to Generate Multifunctional Materials, Interfaces, and Devices

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