The generic enhancement of photochromic dye switching speeds in a rigid polymer matrix

Evans, Richard A.; Hanley, Tracey; Skidmore, Melissa A.; Davis, Thomas P.; Such, Georgina K.; Yee, Lachlan H; Ball, Graham E.; Lewis, David A.

doi:10.1038/nmat1326

Cited by 230 publications

(134 citation statements)

References 17 publications

(12 reference statements)

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“…[178] Other publications addressed this dye-matrix interaction to fully exploit the properties and tuneability of the systems. Thus, R. A. Evans et al [179] reveal that the intramolecular interactions of flexible PDMS (poly dimethylsiloxane) oligomers with spirooxazine 1 (Figure 13) make possible faster chemical processes (thermal fade parameters T 1/2 and T 3/4 reduced by 75% and 94%), greatly increasing the dye switching speed in The lower panel shows a TEM image of the particles (E) and a scheme with the distribution of the dyes inside each particle (F). Reproduced with permission.…”

Section: Organic Photochromism In Hybridsmentioning

confidence: 95%

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Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

244

116

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Research on hybrid inorganic‐organic materials has experienced an explosive growth since the 1980s, with the expansion of soft inorganic chemistry based processes. Indeed, mild synthetic conditions, low processing temperatures provided by “chimie douce” and the versatility of the colloidal state allow for the mixing of the organic and inorganic components at the nanometer scale in virtually any ratio to produce the so called hybrid materials. Today a high degree of control over both composition and nanostructure of these hybrids can be achieved allowing tunable structure‐property relationships. This, in turn, makes it possible to tailor and fine‐tune many properties (mechanical, optical, electronic, thermal, chemical…) in very broad ranges, and to design specific multifunctional systems for applications. In particular, the field of “Hybrid‐Optics” has been very productive not only scientifically but also in terms of applications. Indeed, numerous optical devices based on hybrids are already in, or very close, to the market. This review describes most of the recent advances performed in this field. Emphasis will be given to luminescent, photochromic, NLO and plasmonic properties. As an outlook we show that the controlled coupling between plasmonics and luminescence is opening a land of opportunities in the field of “Hybrid‐Optics”.

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Section: Organic Photochromism In Hybridsmentioning

confidence: 95%

Section: Figure 12mentioning

confidence: 99%

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

244

116

View full text Add to dashboard Cite

show abstract

“…Conventionally, organic dyes capable of undergoing reversible colour switching based on the photoisomerization of constitute chromophores were proposed for potential use as the imaging layer in rewritable printing media [12][13][14][15][16][17][18][19] . However, only limited progresses have been made in this area because of some major challenges [20][21][22] : (i) colour switching often becomes much slower when dyes are present in solid media instead of solution, as their molecular mobility is markedly restricted 23 , (ii) many switchable dyes retain their colour for only several hours under ambient conditions, which is too short for reading, (iii) the toxicity of switchable dyes is often an issue for daily use and (iv) most switchable dyes involve complex synthesis and are therefore expensive. As a result, it is of high interest to develop rewritable papers based on new colour switching mechanisms 24,25 .…”

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confidence: 99%

Photocatalytic colour switching of redox dyes for ink-free light-printable rewritable paper

et al. 2014

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The invention of paper as writing materials has greatly contributed to the development and spread of civilization. However, its large-scale production and usage have also brought significant environment and sustainability problems to modern society. To reduce paper production and consumption, it is highly desirable to develop alternative rewritable media that can be used multiple times. Herein we report the fabrication of a rewritable paper based on colour switching of commercial redox dyes using titanium oxide-assisted photocatalytic reactions. The resulting paper does not require additional inks and can be efficiently printed using ultraviolet light and erased by heating over 20 cycles without significant loss in contrast and resolution. The legibility of prints can retain over several days. We believe this rewritable paper represents an attractive alternative to regular paper in meeting the increasing global needs for sustainability and environmental protection.

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“…[4][5][6][7][8][9][10][11][12][13][14][15] However, the synthesis and characterization of oligomers or polymers containing spiropyran moieties in the main backbone have not been well investigated. [16][17][18][19][20][21][22][23] Herein, we report the synthesis and characterization of conjugated bis-spiropyran derivatives.…”

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confidence: 99%

Synthesis and Characterizations of Bis-Spiropyran Derivatives

Lee¹,

Ji²,

Kang³

2012

Bulletin of the Korean Chemical Society

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We synthesized three different derivatives of bis-spiropyran using simple organic reactions with high yields. BSP1, a derivative of bis-spiropyran having a connection at the position 6' and BSP2, a derivative of bisspiropyran having a connection at the position 5 and BSP3, a derivative of bis-spiropyran containing a dithienylethene group between two spiropyran moieties were synthesized. The optical properties of BSPs were characterized. UV-Vis spectra showed that BSPs exhibit reversible photo-isomerization and the efficiency of photo-isomerization is highly dependent on the position of nitro group. BSPs having nitro group at para position of hydroxy group showed the higher efficiency of photo-isomerization that the one having nitro group at ortho position. The optical microscope images obtained under ultraviolet or visible light exposure demonstrated that the formation of nanorods can be reversibly controlled by optical signal.

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The generic enhancement of photochromic dye switching speeds in a rigid polymer matrix

Cited by 230 publications

References 17 publications

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Photocatalytic colour switching of redox dyes for ink-free light-printable rewritable paper

Synthesis and Characterizations of Bis-Spiropyran Derivatives

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