Photochromic network polymers

Lyubimov, Alexander V.; Zaichenko, N. L.; Marevtsev, V. S.

doi:10.1016/s1010-6030(98)00360-8

Cited by 20 publications

(11 citation statements)

References 8 publications

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“…Powdered and film materials based on ion-containing complexes of spiropyrans [181] and also spiropyran copolymers [182] have also been used to record optical data [180] and increase the duration of its storage.…”

Section: Application Of Spiropyransmentioning

confidence: 99%

Spiropyrans: Synthesis, Properties, and Application. (Review)

Lukyanov

Lukyanova

2005

Chem Heterocycl Compd

207

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Published data on the synthesis and structural modification of spiropyrans and bisspiropyrans and production of the heteroanalogs of spiropyrans are classified and analyzed. The chemical characteristics of spiropyrans, including complexation of the open-chain isomers and cyclic forms are examined. Special attention is paid to the photochromic characteristics of spiropyrans at interfaces between phases.

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Section: Application Of Spiropyransmentioning

confidence: 99%

Spiropyrans: Synthesis, Properties, and Application. (Review)

Lukyanov

Lukyanova

2005

Chem Heterocycl Compd

207

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“…Within rigid, optically clear matrices, such as ophthalmic lens material, viscosity and free volume of the host environment become major factors governing the speed of the photochromic reaction. [19][20][21] Photochromic switching involves substantial mechanical movement, the transition requiring a large intramolecular rotation during coloration and decoloration. Therefore, in solid media the molecules are restricted in their movement rendering the speed of photochromic switching significantly slower.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the photochromic performance of naphthopyrans in a rigid host matrix using poly(dimethylsiloxane) conjugation

et al. 2009

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A series of methoxy substituted 2,2-diaryl-2H-naphthopyran photochromic dyes were assembled incorporating hydroxy functionality to allow their subsequent attachment to flexible poly(dimethylsiloxane) oligomers. The photochromic performance of the generated PDMSnaphthopyran conjugates was studied in a thermoset host matrix and compared to non-conjugated, electronically equivalent control dyes. Both coloration and decoloration speeds were found to be greatly improved with critical T 1/2 decoloration times reduced by 42-80%. The extent of solution-like performance provided by PDMS conjugation in the rigid host was examined with reference to the fade performance of control dyes in solution, and found to range from 20 to 90%. These measures are believed to be influenced by the electronic nature and steric interactions of the photochromic dyes. Scheme 1 Generic photochromic reaction for substituted 2,2-diaryl-2Hnaphtho[1,2-b]pyrans.

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“…To overcome this MC-SP spontaneous thermal interconversion in the solid state, inclusion of photochromic spiropyrans into various solid matrices such as polymers, 21,22 β-cyclodextrin, 23,24 Zeolites 25,26 and sol-gels [27][28][29] etc. has been tried and accordingly, the MC form was moderately stabilized in those matrices, though the photochromic properties were not much enhanced as anticipated.…”

mentioning

confidence: 99%