Selbstorganisierte Gelbildner für die organische Elektronik

Abstract

Die Natur erzeugt Materialien durch chemische Synthese und molekulare Selbstorganisation unter Beteiligung nichtkovalenter Kräfte. Wissenschaftler haben von diesen Phänomenen gelernt und dieses Wissen genutzt, um selbstorganisierte künstliche Materialien vielfältiger Größen, Formen und Eigenschaften für ein breites Spektrum von Anwendungen herzustellen. Ein besonders interessantes Gebiet ist die lösungsmittelunterstützte Gelierung funktioneller organischer Moleküle zur Bildung eindimensionaler Fasern. Solche Fasern weisen hervorragende elektronische Eigenschaften auf und sind vielversprechende Materialien für die organische Elektronik, insbesondere für Heterokontakt‐Solarzellen. Dieser Kurzaufsatz beschreibt, wie Methoden der molekularen Selbstorganisation zur Entwicklung weicher funktioneller Materialien mit Anwendungen in elektronischen Bauelementen wie organischen Feldeffekttransistoren und organischen Solarzellen beigetragen haben.

Translation of Dicarboxylate Structural Information to Fluorometric Optical Signals through Self‐Assembly of Guanidinium‐Tethered Oligophenylenevinylene

“…[2][3][4][5][6][7][8][9] In the chromophoric self-assemblies, for example, the relative arrangements of chromophores, termed J and H type, predetermine the photophysical phenomena [10,11] and thus result in optoelectronic materials with unique light-harvesting, energy/charge-transporting, and light-emitting properties. [12][13][14][15] The exploitation of such properties is one of the reasons why the relationship between the molecular structure and its selfassembly morphology has long been studied through appropriate molecular design. From this context, self-assembly has been recognized as a tool to realize the spontaneous formation of functional nanoarchitectures.…”

Evidence for Kinetic Nucleation in Helical Nanofiber Formation Directed by Chiral Solvent for a Perylene Bisimide Organogelator

“…Keywords: chirality · dyes/pigments · organogels · self-assembly · supramolecular chirality helicity of the aggregates of achiral PBI 1. Based on the careful analysis of the helicity of more than 100 nanofibers by AFM, we were able to quantitatively interpret the observed CD effects and to show that the formation of PBI 1 organogels [15] proceeds through a non-equilibrium self-assembly, that is, by a kinetic nucleation process. [16] Figure 1 depicts the molecular structures of benzoylamide-functionalized PBIs 1-3 as well as a reference PBI 4 that lacks the amide groups required for hydrogen bonding.…”

Formation of Two‐Dimensional Supramolecular Polymers by Amphiphilic Pyrene Oligomers

“…Control of the precise arrangement of chromophores into dimensionally and morphologically defined shapes is a key aspect in the development of optoelectronic devices. [9][10][11][12][13][14][15][16][17] Close spatial proximity and in-plane alignment of chromophores in 2D structural motifs [18][19][20][21][22][23][24][25][26][27] often results in distinct electronic interactions between the partners [28][29][30][31][32][33][34][35][36] leading to charge separation and transport, directional energy transfer, new optical and photophysical properties not observed in the separate molecules. [37][38][39][40][41][42][43][44][45][46] Moreover, spectroscopic changes often provide valuable information about the relative orientation of adjacent chromophores in a given environment.…”