Main-chain photochromic conducting polymers

Harvey, Christopher P.; Tovar, John D.

doi:10.1039/c1py00304f

Cited by 34 publications

(28 citation statements)

References 32 publications

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“…1b) or spirooxazine (Fig. 1c) stimulates electrocyclic ring opening reaction from spiro form to open and planar merocyanine form, which forms an extended conjugated system absorbing light strongly in the Vis region [20][21][22][23]. These transformation processes are all reversible after subsequent Vis irradiation or heating.…”

Section: Polymers With Optical Propertiesmentioning

confidence: 95%

Optical properties of amphiphilic copolymer-based self-assemblies

Wang

Lin

Cai

et al. 2015

European Polymer Journal

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Section: Polymers With Optical Propertiesmentioning

confidence: 95%

Optical properties of amphiphilic copolymer-based self-assemblies

Wang

Lin

Cai

et al. 2015

European Polymer Journal

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“…In the attempt to bring organic (semi)conducting molecules and photochromic molecules together, several important studies were reported demonstrating that these two varieties of molecules could be mutually advantageous: dyads, multiads, and polymers decorated with photochromic units were synthesized and tested leading to major changes in conductivity and optical properties upon light irradiation [150,157,159,[176][177][178][179][180][181][182].…”

Section: Photochromic Molecules and Organic Semiconductors Incorporatmentioning

confidence: 99%

“…Alongside to the undoubtedly disruptive examples of integration of photochromic molecules into dyads, a remarkable effort has also been devoted to the synthesis of photochromic conjugated conductive polymers as, in principle, any photochromic switching unit conjugated within a π-electron polymer would lead to a modulable conductivity [175,177,178,180,181,184,185]. However, despite the notable advances, these materials suffer from a slow or sometimes even irreversible switching mechanism along with low electrical conductivities.…”

Section: Photochromic Molecules and Organic Semiconductors Incorporatmentioning

confidence: 99%

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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“…[ 20,[28][29][30][31][32][33][34][35][36][37] Similarly, conjugated polymers that contain DE moieties in the polymer backbones exhibit photochromism. [ 20,[38][39][40][41] The chromism in both absorption and luminescence of the conjugated polymers is attributed to structural changes in the conjugated backbones resulting from the DE photoisomerization. Hence, it is necessary to properly design the molecular structure to realize the desired switching behavior and fl uorescent colors.…”

mentioning

confidence: 99%

Dynamic Control of Full‐Colored Emission and Quenching of Photoresponsive Conjugated Polymers by Photostimuli

Watanabe

Hayasaka

Miyashita

et al. 2015

Adv Funct Materials

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wileyonlinelibrary.comand aggregation-enhanced emission (AEE) characteristics were reported in selected ACPs. [14][15][16] Therefore, it is of great interest to investigate ACPs in the aggregated state that are quite different from those the isolated chain state.The polymer nanosphere solution can be treated as an intermediate state between a solution state and a solid fi lm state because the polymer nanoparticles uniformly disperse in a solvent, similar to their behavior in solution, whereas the polymer chains aggregate with each other, similarly to their behavior in a solid fi lm. In other words, the polymer nanosphere solution can be regarded as a dispersed nano-ordered crystalline polymer system. This bilateral character of the nanosphere solution causes the polymer to exhibit high processability and fl uidity as well as aggregation effects. In addition, the polymer nanosphere solution enables quantitative analysis of the aggregated state of polymers from the spectroscopic point of view. Hence, the polymer nanosphere solution is useful for understanding the aggregation effect on ACPs as compared with the solution and solid fi lm states.Dynamic control of the fl uorescence of ACPs using an external light stimulus is of particular interest because such photoresponsive polymers are essential for next-generation optoelectronic materials. Dithienylethene (DE) derivatives [17][18][19][20] are one class of the most attractive photoresponsive materials because of their outstanding fatigue resistance, thermal stability, and ability to undergo conformational changes between open and closed forms via photoisomerization, and therefore they are regarded as promising materials for the fabrication of photodynamically controllable luminescent devices [ 21,22 ] as well as photodynamically color-tunable systems. [23][24][25][26][27] The DE derivatives are also known to display luminescent color changes via photoisomerization. [ 20,[28][29][30][31][32][33][34][35][36][37] Similarly, conjugated polymers that contain DE moieties in the polymer backbones exhibit photochromism. [ 20,[38][39][40][41] The chromism in both absorption and luminescence of the conjugated polymers is attributed to structural changes in the conjugated backbones resulting from the DE photoisomerization. Hence, it is necessary to properly design the molecular structure to realize the desired switching behavior and fl uorescent colors.It is well known that in ACP nanoparticles doped with luminescent dopants, the ACP fl uorescence is almost completely quenched and the fl uorescence of the dopant is mainly

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Main-chain photochromic conducting polymers

Cited by 34 publications

References 32 publications

Optical properties of amphiphilic copolymer-based self-assemblies

Optical properties of amphiphilic copolymer-based self-assemblies

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

Dynamic Control of Full‐Colored Emission and Quenching of Photoresponsive Conjugated Polymers by Photostimuli

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