Synthesis of Carrier‐Transporting Dendrimers with Perylenebis(dicarboximide)s as a Luminescent Core

Abstract

Well-defined, modular dendrimers enable processing techniques and electronic properties to be tuned independently. Moreover, the dendritic topology can isolate the core chromophore, thus reducing or eliminating strong intermolecular interactions. This paper presents the synthesis of three series of flexible, dendron-functionalized dendrimers as red-lightemitting materials by a convergent approach: (1) carbazole (CZ) or oxadiazole (OXZ) terminated imide-type dendrimers, (2) cascade energy-transferring imide-type dendrimers, and (3) CZ-terminated perylene bay-type dendrimers. They all consist of the luminescent core of perylenebis(dicarboximide)s with specific functional groups of CZ or OXZ at the periphery and are constructed from flexible Fréchet-type poly(aryl ether) dendrons. The chemical structures of the dendrons and dendrimers were determined by standard spectroscopic

The synthesis of symmetric and asymmetric perylene derivatives and their optical properties

“…Fullerene derivation is difficult and, synthetically, is limited to the maintenance of p-conjugation. Perylenes are similar to fullerenes in character and display reversible redox properties and good thermal and optical stability as well as electron transfer through p-p stacking [8]; many perylene derivatives have been described [5,[9][10][11][12][13].…”

Solution‐processible Thieno‐[3,4‐b]‐pyrazine Derivatives with Large Stokes Shifts for Non‐doped Red Light‐emitting Diodes

“…[5,6] Since the solution processible light-emitting polymers usually fail to produce comparable device performance with those vacuum-deposited counterparts, dendritic molecules have been employed as an alternative for solution processible OLEDs due to the inherent topological features, in which the emissive core is surrounded by a branched shell to prevent self-aggregation and concentration-quenching in the solid state. [7][8][9] Furthermore, dendritic molecules have the merit that they like small molecules to possess repeatable monodispersity and high levels of purity, both of which are essential for ideal device performance. Until now, a large number of various generation fluorescent and even phosphorescent dendrimers have been created for application in solution processible OLEDs.…”

“…Until now, a large number of various generation fluorescent and even phosphorescent dendrimers have been created for application in solution processible OLEDs. [3,[7][8][9][10] In this paper, we report the synthesis and light-emitting properties of a group of solution processible thieno-[3,4-b]-pyrazine-based molecules, DTP, N-DTP and C-DTP (Scheme 1). The bulky pentaphenyl groups (Müllen type dendron) were introduced through a phenylene bridge into the 2,3,5,7-positions of the thieno-[3,4-b]-pyrazine core as dendritic arms in order to protect the core via a site-isolation effect, to provide significant molecular weight and viscosity so that the target molecules were suitable for solution processing, and to generate thermally and morphologically stable molecules due to the excellent stability of this type of dendron.…”

Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties

“…A good way to produce a bipolar transporting material is to introduce both donor and acceptor components in a single molecule, a technique which has been frequently utilized to make bipolar small-molecular emitters [25,26] and host materials [27]. However, the number of donor-acceptor dendrimers with surface-to-core energy transfer is rather limited [28,29]. To the best of our knowledge, no such blue-light-emitting dendrimers have been reported yet.…”