Synthesis and structure elucidation of discotic liquid crystalline perylene imide benzimidazole

Abstract

We report the synthesis of a soluble perylene imide benzimidazole (PIBI) and its structural, thermotropic, optical and electrochemical characterization with emphasis on discotic liquid crystalline properties.

Enhancing the Performance of Solution‐Processed n‐Type Organic Field‐Effect Transistors by Blending with Molecular “Aligners”

“…The absorption onset of PI‐Ph‐PI at 730 nm corresponds to an optical band gap around 1.7 eV. From the electrochemical measurements (Figure S2 and reference ) , the lowest unoccupied molecular orbital (LUMO) energy levels of PI , PI‐Ph‐PI and TP‐TPI rest on –3.8, –3.7 and –3.7 eV, respectively, which are very similar to other rylene diimide derivatives and attest to their potential as n‐type semiconductor materials. The respective HOMO energy levels of PI, PI‐Ph‐PI and TP‐TPI are calculated to be –5.9 eV, –5.5 eV and ‐5.3 eV from their optical band gaps (Figure b).…”

“…A series of peryleneimide imidazole ( PI ) derivatives were designed and synthesized, which are structurally similar to the well‐known PDI family with good electron affinity . The matrix and aligner molecules are a monomeric PI derivative and its dimeric homologue PI‐Ph‐PI , respectively ( Scheme ).…”

Improving the Quantum Yields of Perylene Diimide Aggregates by Increasing Molecular Hydrophobicity in Polar Media

“…[12,13] The aggregate morphology andc rystal structure can also be controlled. [14][15][16][17][18][19][20][21][22] PDIs can interactt oc reate chiral or helical structures, [23] wires, [20,24] "fish-tail" structures, [25] liquid crystal phases, [26] self-assembled mixed aggregates, [27][28][29] and crystallites of varying degrees of disorder. [30,31] These molecular morphologyand electronic modificationshave facilitated many potential materials applications.…”

Association phenomena of a chiral perylene derivative in solution and in poly(ethylene) dispersion

“…Nowadays perylene derivatives represent an extremely important class of organic dyes which are employed in several applications ranging from fluorescence standards [1][2][3], thin film transistors [4][5][6], liquid crystals [7][8][9], light emitting diodes [10], to photovoltaic devices [4,[10][11][12][13].…”