28320-31-2Relevant articles and documents
On-surface polymerization on a semiconducting oxide: Aryl halide coupling controlled by surface hydroxyl groups on rutile TiO2(011)
Kolmer, Marek,Zuzak, Rafal,Ahmad Zebari, Amir A.,Godlewski, Szymon,Prauzner-Bechcicki, Jakub S.,Piskorz, Witold,Zasada, Filip,Sojka, Zbigniew,Bléger, David,Hecht, Stefan,Szymonski, Marek
, p. 11276 - 11279 (2015)
Based on scanning tunneling microscopy experiments, we show that the covalent coupling of aryl halide monomers on the rutile TiO2(011)-(2 × 1) surface is controlled by the density of surface hydroxyl groups. The efficiency of the polymerization reaction depends on the level of surface hydroxylation, but the presence of hydroxyl groups is also essential for the reaction to occur.
Octa(aminophenyl)silsesquioxane as a nanoconstruction site
Tamaki,Tanaka,Asuncion,Choi,Laine
, p. 12416 - 12417 (2001)
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Rational Design of Push–Pull Fluorene Dyes: Synthesis and Structure–Photophysics Relationship
Shaya, Janah,Fontaine-Vive, Fabien,Michel, Beno?t Y.,Burger, Alain
, p. 10627 - 10637 (2016)
Our work surveyed experimental and theoretical investigations to construct highly emissive D–π–A (D=donor, A=acceptor) fluorenes. The synthetic routes were optimised to be concise and gram-scalable. The molecular design was first rationalised by varying the electron-withdrawing group from an aldehyde, ketotriazole or succinyl to methylenemalonitrile or benzothiadiazole. The electron-donating group was next varied from aliphatic or aromatic amines to saturated cyclic amines ranging from aziridine to azepane. Spectroscopic studies correlated with TD-DFT calculations provided the optimised structures. The selected push–pull dyes exhibited visible absorptions, significant brightness, important solvatofluorochromism, mega-Stokes shifts (>250 nm) and dramatic shifts in emission to the near-infrared. The current library includes the comprehensive characterization of 16 prospective dyes for fluorescence applications. Among them, several fluorene derivatives bearing different conjugation anchors were tested for coupling and demonstrated to preserve the photophysical responses once further bound.
Synthesis, characterization and third-order non-linear optical properties of novel fluorene monomers and their cross-conjugated polymers
Ramos-Ortíz,Maldonado,Hernández,Zolotukhin,Fomine,Fr?hlich,Scherf,Galbrecht,Preis,Salmon,Cárdenas,Chávez
, p. 2351 - 2359 (2010)
We designed and synthesized two novel fluorene monomers of D-A-D (donor-acceptor-donor) type (M1 and M2), and their two corresponding polymers (PM1 and PM2) and a copolymer (CPM). These high molecular weight, film-forming polymers were obtained from metal-free, superacid-catalyzed reactions of the monomers with N-phenylisatin. The cubic NLO response (χ(3)) for these new compounds, in solid thin films, was measured through the use of third-harmonic generation (THG) Maker-Fringes technique at IR wavelengths given values of the order of 10-12 esu from which, the corresponding second hyperpolarizabilities (γ) were estimated to be of the order of 10-33 esu for monomers and 10-31 esu for polymers. Second hyperpolarizabilities have also been estimated theoretically at B3LYP/6-31G(d) level of theory in gas phase and related with the electronic structure of the synthesized molecules.
Spirooxazine photochromic compound and preparation method thereof
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Paragraph 0016, (2020/06/17)
The invention discloses a spirooxazine photochromic compound and a preparation method thereof, and belongs to the technical field of organic functional materials. The molecular structure is disclosedin the invention, whereinR1 and R2 are hydrogen, C1-C6 alkyl (CH2, m = 1, 2, 3, 4, 5, 6), and benzyl; R3and R4 are hydrogen, halogen, C1-C6 alkyl (CH2, m = 1, 2, 3, 4, 5, 6). Accordingto the invention, a photothermal stable fluorene phenol structure is introduced; different groups are used for substitution; the advantages of a novel photochromic material with spirooxazine are provided; the light response speed is high; meanwhile, color fading is rapid, moreover, the photo-thermal stability is good, an open-loop state and a closed-loop state can stably exist for a long time; guidance is provided for solving the problem that the ring-opening state ofspirooxazine photochromic compounds is unstable; the photochromic compound with various color changes from colorless to red, yellow, green, blue or purple is realized, the color variety of color change is richer, the market diversification requirements are finally met, the synthesis raw materials are cheap and easily available, and the synthesis process is easy to realize industrialization.
Fused cyclic compound and organoelectroluminescent device comprising the compound
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Paragraph 0060-0066, (2018/10/24)
The present invention refers to novel fused ring compound and including organic light emitting diode relates to search, the present invention according to fused ring compounds including organic electroluminescent device which has a low driving voltage 1 by disclosed. (by machine translation)
