Azo-group-containing polymers for use in communications technologies

Nuyken, Oskar; Scherer, C.; Baindl, A.; Brenner, Axel R.; Dähn, U.; Gärtner, Robert S.; Kaiser-Röhrich, S.; Kollefrath, R.; Matusche, P.; Voit, Brigitte

doi:10.1016/s0079-6700(96)00020-2

Cited by 87 publications

(39 citation statements)

References 138 publications

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“…In our recent communications 19,20 we have reported a series of novel polyacrylates with triazene units in the side chain tailored for microlithography 21 and photoresist technique, 22 owing to specific behavior of photoclivable triazene chromophore capable to undergo a photochemical decomposition with release of molecular nitrogen. In order to connect the photochemical data with photophysical ones, the photodecomposition of the synthesized copolyacrylates (TCP-1 and TCP-2) was monitored by UV spectroscopy during irradiation performed with a high-pressure mercury lamp.…”

Section: Resultsmentioning

confidence: 99%

Fluorescence Properties of Some Triazene Polyacrylates for Possible Sensor Applications

Buruiana¹,

Stroea²,

Buruiană³

2009

Polym. J.

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We report here a first study on the capacity of the triazene chromophore attached to a polymeric backbone to present fluorescence properties. The sensing ability of two triazene copolymers poly[1-(phenyl)-3-(2 acryloyloxyethyl)-3-methyl triazene-1-co-methyl methacrylate] (TCP-1) and poly[1-(paramethoxy-phenyl)-3-(2 acryloyloxyethyl)-3-methyl triazene-1-co-methyl methacrylate] (TCP-2) in dimethylformamide (DMF) has been investigated by fluorescence spectroscopy in tandem with a quenching experiments using a variety of metal ions (Fe 3þ , Fe 2 , Cu 2þ and Cu þ ), which suggests that these triazene polymers could find practical applications for detection of metal ions. The emission spectra exhibited strong fluorescence emissions at 375 nm (TCP-1) and 410 nm (TCP-2) respectively, while the ability of Fe 3þ , Fe 2þ , Cu 2þ and Cu þ to quench the fluorescence of the triazene fluorophore has been explained on the basis of energy transfer processes involving the triazene excited state and the metal ion. The corresponding Stern-Volmer representations for all fluorescence emission spectra were also described.KEY WORDS: Polyacrylates / Fluorescence / Quenching / Sensor / Fluorescence spectroscopy and its applications in biochemical, medical, and chemical research have improved rapidly during the past decade.1 The increased interest on fluorescence emission appears to be the consequence of numerous developments and the fast appearance of new fluorescence methods in explaining physical and life sciences research. Based on sensitivity, selectivity and non-destructive characteristics, fluorescence spectroscopy can evidence various photophysical properties like fluorescence intensity, 1 emission maximum, 2 anisotropy, excimer or exciplex formation, 3 etc., whereas any variation caused by connecting or interacting with special external species (for instance, metal ions) could be used for sensing purposes. 4 In fact, the fluorescent sensors can offer several distinct advantages in terms of sensitivity, selectivity, response time and local observation. In the case of selective fluorescence sensors for cation detection, the scientists made considerable efforts for the development of these kinds of systems.As a general characteristic, fluorescence quenching refers to any process which undergoes emission intensity changes of a given molecule. Fluorescence response can be generated by a variety of mechanisms, including excited state reactions, energy transfer, complex formation, and collision quenching, 5,6 while photoinduced electron transfer and electronic energy transfer are considered the two main deactivation pathway responsible for an efficient fluorescence inhibition.Our group has specially focused on designing and fabricating a diversity of (co)polymers bearing different fluorophores such as pyrene, 7,8 dansyl, 9 stilbene 10,11 or anthracene 12 characterized through high quantum yields and good extinction coefficients, making them attractive components of biological and chemical sensors.

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Section: Resultsmentioning

confidence: 99%

Fluorescence Properties of Some Triazene Polyacrylates for Possible Sensor Applications

Buruiana¹,

Stroea²,

Buruiană³

2009

Polym. J.

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“…The previous studies on the photolability of some triazene model compounds [16], demonstrated that the introduction of electron-donating groups (alkyl, ether, etc.) at the aromatic ring has a major effect on the photolytic decay, whereas the electron-withdrawing groups, like nitro, cyano, halides, etc., increase the photochemical stability.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Properties of New Poly(urethane-acrylates) With Pendant Triazene Moieties

Buruiana¹,

Melinte²,

Buruiană³

et al. 2008

Designed Monomers and Polymers

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New triazene urethane methacrylates, 1-(phenyl)-3-(2-methacryloyloxyethyl)-3-methyl triazene-1 (UMA-T1) and 1-(p-methoxyphenyl)-3-(2-methacryloyloxyethyl)-3-methyl triazene-1 (UMA-T2), were synthesized and characterized to be used as co-partners in the radical co-polymerization with methyl methacrylate for achieving triazene-co-polymethacrylates. The synthesized photo-polymers were spectrally and thermally characterized, the results being satisfactory for this class of materials. The most important feature of the co-polyacrylates is their photosensitivity, evaluated by the UV irradiation in DMF solution or thin films, following the disappearance of the π-π * absorption band, corresponding to the triazene chromophore, in the UV spectra. Such photolabile polymers with good film-forming properties could offer new possibilities in printing techniques and nanostructuring on surfaces. In addition, the triazene functions introduced as side-groups may be exploited for the tailoring of novel functional polymeric architectures.

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“…Several organic molecules with conjugated chain structure (such as Disperse Red One, DR1, dye molecules used here) are known to possess good non-linear optical properties, and are used to elaborate optical functions such as optical modulators or switching devices [1,2]. Oriented mesoporous silica can host such small organic molecules and then be efficient for the photonic applications mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Oxidised porous silicon/disperse red 1 composite material: fabrication and micro‐Raman spectrometry analysis

Guendouz

Kloul

Haesaert

et al. 2005

phys. stat. sol. (c)

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PACS Single porous silicon layers (60%, 70% and 80% porosity) and double porous silicon layers with two different porosities (80%-73% and 73%-80%) were completely oxidised and then filled by Disperse Red One molecules (referred to as DR1). The formed composite materials were characterised by optical reflectivity measurements and micro-Raman spectrometry in order to probe the DR1 relative concentration profile along the porous layers. In the single layers, the Raman signals linearly increase with porosity starting from a critical value (estimated at 40% before oxidation). On the contrary, in the case of double layer systems, the DR1 filling was always higher in the low porosity layer.

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Azo-group-containing polymers for use in communications technologies

Cited by 87 publications

References 138 publications

Fluorescence Properties of Some Triazene Polyacrylates for Possible Sensor Applications

Fluorescence Properties of Some Triazene Polyacrylates for Possible Sensor Applications

Synthesis and Properties of New Poly(urethane-acrylates) With Pendant Triazene Moieties

Oxidised porous silicon/disperse red 1 composite material: fabrication and micro‐Raman spectrometry analysis

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