Modified melamine resins for optical applications

Mahler, Joachim; Rafler, G.

doi:10.1016/s0925-3467(99)00037-3

Cited by 17 publications

(9 citation statements)

References 7 publications

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“…The chemical structure of the melamine monomers AMH1 and AMH2 with chemically attached side groups of Disperse Orange 3 and a modified Disperse Red 1 is shown in Scheme 1. Details of its chemical synthesis as well as details on the characterization of the corresponding resins are given in refs 7-10 and in the patent, 11 which describes a novel route for the synthesis of very stable chromophore resins for optical and optoelectronic applications.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Thus, there are only a few investigations on melamine resins as photoaddressable polymers . The problem of combining the melamine with such chromophores can, however, be solved by attaching at first the chromophore to the triazine and by transferring the newly synthesized chromophore subsequently into a cross-linkable melamine−chromophore. , The azo dye containing melamine monomer can be processed easily into the polymeric resin by thermal treatment at temperatures above 120 °C.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric and Photoorientation Studies in Semicrystalline Melamine Monomers and Amorphous Melamine Networks Containing Azobenzene Chromophores

Stracke¹,

Wendorff²,

Mahler³

et al. 2000

Macromolecules

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We demonstrate optical storage by means of trans-cis isomerization within melamine monomers as well as within the corresponding cross-linked melamine resins using holographic grating experiments. The melamine monomer is chemically linked with a photoaddressable azobenzene group. By thermal treatment the semicrystalline monomers can be converted into the amorphous cross-linked resin. Both the monomer material and the cross-linked resins display a photoinduced trans-cis isomerization of the azo groups, a stable photoorientation under irradiation with linear polarized light, and a stable storage of holographic gratings. The photokinetics in the different environments are found to be similiar but somewhat faster for the amorphous resins.

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Section: Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dielectric and Photoorientation Studies in Semicrystalline Melamine Monomers and Amorphous Melamine Networks Containing Azobenzene Chromophores

Stracke¹,

Wendorff²,

Mahler³

et al. 2000

Macromolecules

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“…The 2,4,6-trichloro-1,3,5-triazine (TCT), so-called cyanuric chloride, is an important triazine derivative and a well-known precursor in organic synthesis. [1][2][3][4][5][6][7][8][9][10][11] This precursor have become a very attractive field of research by virtue of the applications that can be envisaged with the obtained products, such as polymers, [12][13][14][15] non-linear optical materials [16][17][18] and new photoactive materials. [19][20][21][22][23] A particular interest has been reported on the use of cyanuric chloride in reactive dyes 24 since they are able to bond hydroxy groups from the cellulose and amino or thiol from proteins or polyamides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photophysical properties of ESIPT reactive triazine derivatives

Kuplich¹,

Grasel²,

Campo³

et al. 2012

J. Braz. Chem. Soc.

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Uma série de quatro compostos fotoativos derivados da triazina foi obtida a partir da substituição nucleofílica aromática no cloreto cianúrico. Os compostos foram caracterizados por espectroscopia de infravermelho (IR) e ressonância magnética nuclear (NMR de 1 H e 13 C), além de espectrometria de massas de alta resolução (HRMS MALDI). A espectroscopia de absorção na região do UV-Vis e a emissão de fluorescência (no estado sólido e em solução) foram também utilizadas para estudar o comportamento fotofísico destes compostos. Os derivados obtidos são fluorescentes na região do azul-laranja por um mecanismo de transferência protônica intramolecular no estado excitado e apresentam um grande deslocamento de Stokes (6365-10290 cm-1). Os derivados sintetizados neste trabalho reagiram com sucesso com fibras de celulose para dar novos compostos celulósicos fluorescentes. Four new reactive fluorescent triazine derivatives were obtained from nucleophilic aromatic substitution of cyanuric chloride. The compounds were characterized by infrared spectroscopy (IR), nuclear magnetic resonance (13 C and 1 H NMR) and high resolution mass spectrometry (HRMS MALDI). UV-Vis and steady-state fluorescence (in solution and in solid state) spectroscopies were also applied to characterize the photophysical behavior. The dyes are fluorescent by an intramolecular proton transfer mechanism (ESIPT) in the blue-orange region, with a large Stokes shift between 6365-10290 cm-1. The fluorescent cyanuric derivatives could successfully react with cellulose fibers to give new fluorescent cellulosic materials.

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“…. The reactions of cyanuric chloride a stepwise and selective reaction of three symmetric chlorides in the triazine ring of the modified melamine resins 37. The amine substitutions were carried out at different reaction temperatures and solvents for three individual chlorides in the triazine ring.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of polymer/multiwall carbon nanotube/nanoparticle nanocomposites and preparation of their metal complexes

Golikand

Didehban

2010

J of Applied Polymer Sci

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Carbon nanotube-polymer nanocomposites were synthesized and characterized successfully. In this work, multiwall carbon nanotubes (MWCNT) were opened using HNO 3 /H 2 SO 4 mixture and filled by metal nanoparticles such as silver nanoparticles through wetchemistry method. The oxidized MWCNT were reacted subsequently with thionyl chloride, 1,6-diaminohexane, producing MWNT-amine functionalized. Then the MWCNT containing metal nanoparticles were used as a monomer with different weight percentages in melt polymerization with An and CNCl separately. Furthermore, the polyamide and polytriazine modified MWCNT were used for the preparation of metal ion complexes such as Fe þ2 and La þ3 . The structures and properties of nanocomposites were evaluated by TEM, DSC, TGA, and FT-IR methods. The chelating behavior and sorption capacities of prepared nanocomposites were carried out by using some metal ions.

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Modified melamine resins for optical applications

Cited by 17 publications

References 7 publications

Dielectric and Photoorientation Studies in Semicrystalline Melamine Monomers and Amorphous Melamine Networks Containing Azobenzene Chromophores

Dielectric and Photoorientation Studies in Semicrystalline Melamine Monomers and Amorphous Melamine Networks Containing Azobenzene Chromophores

Synthesis, characterization and photophysical properties of ESIPT reactive triazine derivatives

Preparation and characterization of polymer/multiwall carbon nanotube/nanoparticle nanocomposites and preparation of their metal complexes

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