Reversible mobility switching in molecular materials controlled by photochromic reactions

Sworakowski, J.; Nešpůrek, S.; Toman, Petr; Wang, Geng; Bartkowiak, Wojciech

doi:10.1016/j.synthmet.2004.05.033

Cited by 21 publications

(12 citation statements)

References 6 publications

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“…With the successful use of organic dyes as memory media in CD-R (Compact disc recordable) systems, photochromic materials are also anticipated as a promising candidate for erasable memory media in future. So depending upon the anticipated change in different types of anils, various scientists [5][6][7][52][53][54][55][56][57][58][59][60][61][62][63] A. Plaquet et al [58] also reported about the investigation on the second order nonlinear optical responses in the keto-enol equilibrium of the anil derivatives, in particular second harmonic generation with focus on potential applications in optical communications, data storage and organic molecular switches. Delaire et al [52] reviewed the studies of Linear and Non-Linear optical properties of photochromic molecules and materials related to Schiff's Bases.…”

Section: Discussionmentioning

confidence: 99%

Photochromism in Anils - A Review

Rawat¹,

Mal²,

Singh³

2015

CHEM

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This review describes in brief the historical perspective of photochromism and photochromic behaviour of ‘Anils’. This phenomenon among ‘Anils’ is exhibited due to the tautomerism between enol and keto form via six membered hydrogen transfer between the phenolic hydrogen and imine nitrogen and show the phenomenon of solid-state photochromism and thermochromism and photochromism in rigid glassy solutions as well. Photochromic property in ‘Anils’ is a characteristic of the molecule, but their chromo behaviour is not only influenced by the crystal structure of anils but also by the substituents in the salicylidene-aniline molecules by affecting the acidity of phenolic oxygen as well as the basicity of imine nitrogen that affects the enolic-character of anils. The growing interest in photochromic anils is due to the potential applications, more specifically due to the existence of anils in enolic- and keto- forms.

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Section: Discussionmentioning

confidence: 99%

Photochromism in Anils - A Review

Rawat¹,

Mal²,

Singh³

2015

CHEM

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“…5 lattice constants of a typical molecular crystal (e.g., anthracene) and taking the depths of traps 0.5 eV, one arrives the decrease of the mobility six orders of magnitudes at ambient temperature. When dipolar species are formed by light, e.g., using a photochromic additive, an optoelectric switch can be constructed [40]. We have performed two experiments using spiropyrane (SP) molecule (3 0 ,3 0 -dimethyl-6-nitro-2,3-dihydrospiro(benzothiazole-2,2 0 -[2H]chromene)), which changes after UV exposure to zwitterionic highly polar merocyanine MR, (3-methyl-2-(1-methyl-2(5-nitro-2-oxidophenyl)vinylbenzothiazol-3-ium)) (see reaction (30) in Scheme 2).…”

Section: =[644]mentioning

confidence: 99%

Polymeric Composites Based on Polysilanes for Plastic Electronics

Nešpůrek

Pospíšil

Kratochvílová

et al. 2008

Molecular Crystals and Liquid Crystals

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The article reviews photophysical and photochemical properties of polysilanessilicon backbone r-conjugated polymers. Polysilanes have been of considerable research interest because of their electrical, optical and photoelectrical properties. Some of them seem to be prospective for the construction of electronic devices, like electroluminescent diodes, photodetectors, templates for oriented films of liquid crystals, molecular switches and phototransistors. Because of the effect of p-electron delocalization along the chain, they are good charge transporting materials and therefore good models for molecular wires. Their physical properties and chemical stability can be modified by side groups and by additives of different chemical structures.

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“…Photochromic molecules, which refer to the reversible color change with light irradiation, have been studied extensively because of their capability to modulate physical and chemical properties for photoresponsive functional materials, such as molecular optical switches, rewritable data memories, and chemical sensing . Among these materials, the photochromic dithienylethene derivatives have received much attention for their excellent photochromic properties with good fatigue resistance, thermal irreversibility, and short response time, not only in solution but also in the single‐crystalline phase .…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and photochromic properties of diarylethene‐containing terpyridine and its transition metal (Zn²⁺/Co²⁺/Ru²⁺) complexes

Zhang

Huo

Wang

et al. 2012

J of Physical Organic Chem

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Several transition metal complexes based on 2,3-bis(2,4,5-trimethyl-3-thienyl)maleic anhydride (DTE) bearing terpyridine (TPY) have been designed and synthesized. Furthermore, the photochromism of the free ligand and the influence of transition metal moieties on the photochemical properties have been thoroughly characterized by monitoring the changes in their UVvis spectra. Compounds 3-6 all display excellent response to UV irradiation, especially Co complex 5 with optimum sensitivity that took only 5 s to reach photostationary state. The photochromic properties of DTE unit have been found to be strongly influenced by the bridging transition metals, as complexes 4 (L-Zn-L) and 6 (L-Ru-L) exhibit much better photochromic properties in tetrahydrofuran solution than complex 5 (L-Co-L) and the free ligand 3 (L). It is worth noting that the optical/chemical thermal stabilities of photochromic compounds 3-6 are all greatly improved after the precursor functionalized with TPY and further coordinated with metal ions.

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Reversible mobility switching in molecular materials controlled by photochromic reactions

Cited by 21 publications

References 6 publications

Photochromism in Anils - A Review

Photochromism in Anils - A Review

Polymeric Composites Based on Polysilanes for Plastic Electronics

Facile synthesis and photochromic properties of diarylethene‐containing terpyridine and its transition metal (Zn²⁺/Co²⁺/Ru²⁺) complexes

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Reversible mobility switching in molecular materials controlled by photochromic reactions

Cited by 21 publications

References 6 publications

Photochromism in Anils - A Review

Photochromism in Anils - A Review

Polymeric Composites Based on Polysilanes for Plastic Electronics

Facile synthesis and photochromic properties of diarylethene‐containing terpyridine and its transition metal (Zn2+/Co2+/Ru2+) complexes

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Product

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Facile synthesis and photochromic properties of diarylethene‐containing terpyridine and its transition metal (Zn²⁺/Co²⁺/Ru²⁺) complexes