Photoactive Azobenzene Polymers Containing Carbazole Chromophores

Altomare, Angelina; Ciardelli, Francesco; Mellini, Linda; Solaro, Roberto

doi:10.1002/macp.200400114

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…The simultaneous presence of these functions, sensitive to electromagnetic stimuli, creates the premises to display both the typical properties of asymmetric systems (optical activity, exciton division of dichroic absorption) and the typical characteristics of photochromic materials (photo refractivity, photo reactivity, N properties). In this context, it seemed interesting to investigate the properties of new multifunctional copolymer materials containing both photo responsive azobenzene and the photoconductive carbazole chromophore directly bound to the polymeric side chain through the chiral fragment: the presence of the electron-rich carbazole sequence as partner of the electron-poor azobenzene chromophores can induce charge transfer interactions fundamental in the operation of photoconductive materials [154].…”

Section: Figurementioning

confidence: 99%

Polymer Architectures for Optical and Photonic Applications

Albu¹,

Târpă²

2022

Nonlinear Optics - Nonlinear Nanophotonics and Novel Materials for Nonlinear Optics

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The last decade of the last century is marked by a revolution in the synthesis of materials for optical and photonic applications, against the background of the growing need for new high-performance materials to increase the efficiency, reliability and speed of response linked to environmental aspects. The diversity of requirements and the optimization of the responses has led to a major dispute over the structure and composition of these materials: Inorganic or Organic, Natural or Synthetic, Hybrid or Pure, which has stimulated interest in the development of various architectures. Special attention shall be paid to establishing a fundamental relationship to correlate the non-linear optical response and chemical structure, especially for the category of organic materials- particularly polymers- distinguished by structural/compositional versatility and suitable for processing by simple technique which allows serial production. In fact, optical nonlinearity (NLO) is not an exotic phenomenon. Indeed, all materials are optically nonlinear if light is sufficiently intense. The synthesis of functional photonic organic materials is a major challenge of contemporary community of material scientists to imagine new functional materials based of” collective” phenomena by virtue of the “engineered” molecule- molecule interactions and spatial relationships. In this context, this paper aims to highlight the most important features concerning the structural - compositional relationship of polymeric materials used in optoelectronic and photonic applications.

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Section: Figurementioning

confidence: 99%

Polymer Architectures for Optical and Photonic Applications

Albu¹,

Târpă²

2022

Nonlinear Optics - Nonlinear Nanophotonics and Novel Materials for Nonlinear Optics

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“…[22,[31][32][33] In particular, poly[(S)-(À)-MECP] exhibits a higher T g value than poly[(S)-(þ)-MECSI], indicative of a remarkable presence of strong inter-and/or intramolecular dipolar interactions in the solid state between side-chain aromatic , resulted also very high, with onset decomposition temperature (T d ) of 330 and 349 8C, respectively, much higher than those reported for PVK (227 8C), [34] deeply investigated as polymeric material for photorefractive applications, [1] and for other methacrylic carbazolecontaining polymers. [31,35] Again, the higher T d value for poly[(S)-(À)-MECP] can be attributed to increased interand/or intramolecular polar interactions between the neighboring side-chain moieties.…”

Section: Thermal Characterizationmentioning

confidence: 99%

Methacrylic Polymers Containing Optically Active Side‐Chain Carbazole: Synthesis, Characterization and Photoconductive Properties

Angiolini

Benelli

Giorgini

et al. 2008

Macro Chemistry & Physics

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Two novel optically active polymethacrylates bearing in the side chain a cyclic chiral group of one prevailing absolute configuration linked to the carbazole chromophore, deriving from the related monomers (S)‐(−)‐3‐methacryloyloxy‐N‐[3‐(9‐ethylcarbazolyl)]pyrrolidine [(S)‐(−)‐MECP] and (S)‐(+)‐2‐methacryloyloxy‐N‐[3‐(9‐ethylcarbazolyl)]succinimide [(S)‐(+)‐MECSI], have been prepared and characterized with the aim to obtain materials suitable to photoconductive applications. Poly[(S)‐(−)‐MECP] and poly[(S)‐(+)‐MECSI] exhibit remarkable thermal stability, with glass transition temperature around 200 °C and decomposition temperatures in the range 330–350 °C. Spectroscopic, thermal and chiroptical characterizations indicate the occurrence of dipolar interactions among the side chain moieties and the presence of chiral conformation at least for chain segments of the macromolecules. The photoconductive properties are discussed in terms of extent of conjugation in the side chain based on the electron‐acceptor or electron‐donator properties of the optically active ring linked to the carbazole group.magnified image

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“…However, one could imagine enhancing thermal, light and chemical stabilities of dyes if they are incorporated in a polymeric structure as pendant groups. Recently, incorporation of a dye moiety into a polymer structure has been a subject of interest to many research groups and for various purposes such as synthesis of photoactive polymers [3], non covalent interactions between dye molecules and polymers in optical storage field [4], as well as improvement of color fastness of polymers [5], etc.…”

Section: Introductionmentioning

confidence: 99%

Dye-Containing Methacrylic Polymers in the Composition of Photo Resists for Complementary Metal Oxide Semiconductor Image Sensors

Jeong

Motallebi²,

Kim

et al. 2016

Eur Chem Tech J

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The trend in the development and manufacturing of Complementary Metal Oxide Semiconductor (CMOS) image sensors is to miniaturize pixels on the chips and hence to improve their imaging characteristics by providing a higher image resolution. As CMOS technology scales down into submicron regions, the conventional color filters are no longer suitable for generating the desired optical density. The major drawback of the conventional color filters produced from pigment-based positive tone photosensitive compositions, is the heterogeneous dispersion of pigments in photoresist composition resulting in color irregularities due to coarse particles of the pigments. One of the most perspective ways to solve this problem is a replacing the pigment with a dye as a coloring agent and thus, increasing solubility of the latter to obtain a homogeneous colored photoresist composition. In this paper, several novel red dye-containing materials are synthesized and tested to provide a redcolored photosensitive composition. This red-colored photosensitive composition is very promising for application as color filters for CMOS image sensors with high resolution and high level of integration architecture.

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Photoactive Azobenzene Polymers Containing Carbazole Chromophores

Cited by 12 publications

References 47 publications

Polymer Architectures for Optical and Photonic Applications

Polymer Architectures for Optical and Photonic Applications

Methacrylic Polymers Containing Optically Active Side‐Chain Carbazole: Synthesis, Characterization and Photoconductive Properties

Dye-Containing Methacrylic Polymers in the Composition of Photo Resists for Complementary Metal Oxide Semiconductor Image Sensors

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