A convergent synthesis of (diphenylvinyl)benzene (DPVB) star-shaped compounds with tunable redox, photo- and electroluminescent properties
作者:Rafael Gómez、Dirk Veldman、Bea M. W. Langeveld、José L. Segura、René A. J. Janssen
DOI:10.1039/b707496d
日期:——
In this paper we describe a convenient and convergent approach to the synthesis of novel and highly luminescent (diphenylvinyl)benzene (DPVB)-based conjugated star-shaped molecules, which can be used as emitting dyes in doped OLEDs. The versatility of this synthetic route allows tuning of the HOMO–LUMO energy levels of the materials by means of the introduction of different electroactive peripheral groups. Two related star-shaped dyes have been prepared, one with amine and one with alkoxy end groups, and have been characterized using optical spectroscopy and cyclic voltammetry. The energy levels of the dyes are found to lie within the band gap of a polyfluorene (PF) derivative such that energy transfer from the photoexcited PF to the dyes takes place. In OLEDs that contain 1 wt% of dye in PF, the emission is predominantly from the dye. Although the EL spectra are similar for the two dyes, other device characteristics differ greatly. OLEDs using the amine-terminated dye have a luminance that is a few orders of magnitude lower than that based on the alkoxy-terminated dye. The differences are explained by the positioning of the HOMO and LUMO levels of the two dyes compared to those of PF. The dye with the amine end group can act as a deep trap for holes, reducing charge transport in the film.
5-Aryl-1.3.3.-trimethyl-2-methylene-indoline derivatives and salts thereof, methods for the production and use of said compounds for the temporary coloration of fibres
申请人:——
公开号:US20030213071A1
公开(公告)日:2003-11-20
A method for the synthesis of 5-aryl-1,3,3,-trimethyl-2-methylene-indoline derivatives of Formula (I) or its salts of Formula (Ia)
1
wherein 1 mole of a 5-aryl-2,3,3-trimethyl-3H-indole derivative of Formula (VII) is reacted for 1 to 44 hours at a temperature of 20° to 180° C. in an apolar, aprotic or polar, protic or polar aprotic solvent with 1 to 50 moles of a compound of Formula R1-A; new compounds of Formulas (I)/(Ia) and (V), obtainable by this method
2
as well as an agent containing at least one compound of Formula (I)/(Ia) and a carbonyl/inune compound for dyeing keratinic fibers and a method for temporarily dyeing keratin fibers, for which the keratin fiber is dyed with the aforementioned agent and the dyeing, so obtained, is removed again at any later time by a sulfite preparation.
Synthesis, Electronic Characterisation and Significant Second‐Order Non‐Linear Optical Responses of
<i>meso</i>
‐Tetraphenylporphyrins and Their Zn
<sup>II</sup>
Complexes Carrying a Push or Pull Group in the β Pyrrolic Position
the synthesis and characterisation by electronic absorption spectroscopy, cyclic voltammetry and by a solvatochromic investigation of meso-tetraphenylporphyrins and their ZnII complexessubstituted at the β pyrrolic position by a pseudo-linear, π-delocalised organic linkercarrying either an electron-withdrawing (pull) or electron-donating (push) group. The second-order NLOresponse of these push-pull
Materials, methods, and uses for photochemical generation of acids and/or radical species
申请人:Marder Seth
公开号:US20050173683A1
公开(公告)日:2005-08-11
The present invention provides compounds and compositions, which include: at least one chromophore having strong simultaneous two-photon or multi-photon absorptivity; at least one acid- or radical-generator in close proximity to the chromophore; such that the single- or multi-photon excitation of the chromophore results in the generation of an acid and/or redical that is capable of activating chemistry; and such that compositions of matter based on the componds and compositions of the invention can be photo-patterned by one- or multiphoton excitation.
Materials, methods and uses for photochemical generation of acids and/or radical species
申请人:The Arizona Board of Regents on behalf of the
University of Arizona
公开号:EP2236488A1
公开(公告)日:2010-10-06
The present invention provides compounds and compositions, including a selenonium or sulfonium group, which include; at least one chromophore having strong simultaneous two-photon or multi-photon absorptivity; at least one acid- or radical-generator in close proximity to the chromophore; such that the single- or multi-photon excitation of the chromophore results in the generation of an acid and/or radical that is capable of activating chemistry; and such that compositions of matter based on the compounds and compositions of the invention can be photo-patterned by one- or multi-photon excitation.