Star-shaped π-conjugated oligomers and their applications in organic electronics and photonics
- 2 June 2010
- journal article
- review article
- Published by Royal Society of Chemistry (RSC) in Chemical Society Reviews
- Vol. 39 (7), 2695-2728
- https://doi.org/10.1039/b918154g
Abstract
Strategies for the design and construction of non-linear, 2D and 3D conjugated macromolecules are presented in this critical review. The materials, termed here as star-shaped structures, feature a core unit which may or may not provide conjugated links between arms that radiate like spokes from a central axle. The arms of the macromolecules consist of linear oligomers or irregular conjugated chains lacking a formal repeat unit. The cores range from simple atoms to single or fused aromatic units and can provide a high level of symmetry to the overall structure. The physical properties of the star-shaped materials can be markedly different to their simple, linear conjugated analogues. These differences are highlighted and we report on anomalies in absorption/emission characteristics, electronic energy levels, thermal properties and morphology of thin films. We provide numerous examples for the application of star-shaped conjugated macromolecules in organic semiconductor devices; a comparison of their device performance with those comprising analogous linear systems provides clear evidence that the star-shaped compounds are an important class of material in organic electronics. Moreover, these structures are monodisperse, well-defined, discrete molecules with 100% synthetic reproducibility, and possess high purity and excellent solubility in common organic solvents. They feature many of the attributes of plastic materials (good film-forming properties, thermal stability, flexibility) and are therefore extremely attractive alternatives to conjugated polymers (210 references).Keywords
This publication has 100 references indexed in Scilit:
- Broadly tunable deep blue laser based on a star-shaped oligofluorene truxeneSynthetic Metals, 2010
- Low‐Threshold Distributed‐Feedback Lasers Based on Pyrene‐Cored Starburst Molecules with 1,3,6,8‐Attached Oligo(9,9‐Dialkylfluorene) ArmsAdvanced Functional Materials, 2009
- Synthesis and characterization of triphenylamine-3-hexylthiophene oligomer hybrids: A triphenylamine core carrying three terthiophene branches and triphenylamine end-capped quaterthiopheneSynthetic Metals, 2008
- Role of Symmetry and Charge Delocalization in Two-Dimensional Conjugated Molecules for Optoelectronic ApplicationsChemistry of Materials, 2007
- Two-Dimensional Charge Delocalization in X-Shaped Phenylenevinylene OligomersChemistry of Materials, 2006
- Monodisperse Oligofluorenes with Keto Defect as Models to Investigate the Origin of Green Emission From Polyfluorenes: Synthesis, Self-Assembly, and Photophysical PropertiesChemistry – A European Journal, 2005
- Counting Chromophores in Conjugated PolymersAngewandte Chemie-International Edition, 2005
- Ultrafast Fluorescence Investigation of Excitation Energy Transfer in Different Dendritic Core Branched StructuresJournal of the American Chemical Society, 2003
- Methylium Ions with OPV Chains − New NIR DyesEuropean Journal of Organic Chemistry, 2001
- Tri (p-terphenyl-4-yl) amine as a novel blue-emitting material for organic electroluminescent devicesSynthetic Metals, 1997