Helical thienothiophene (TT) and benzothieno–benzothiophene (BTBT) derivatives: synthesis, structural characterization and semiconducting properties

Abstract

Thienothiophene (TT) and benzothieno-benzothiophene (BTBT) have been successfully included here in the helical backbone of helicene derivatives. The employed synthetic approach gives access in a controlled manner to both simple...

Enantiopure Dinaphtho[2,3‐b:2,3‐f]thieno[3,2‐b]thiophenes: Reaching High Magnetoresistance Effect in OFETs

“…[ 33 ] Other publications deal with the use of chiral semiconductors in OFETs but without mention of CISS effect. [ 34–42 ] For the sake of completeness, it should be noted that magnetic effects in achiral semiconductors are known to be very weak. [ 43 ]…”

“…[33] Other publications deal with the use of chiral semiconductors in OFETs but without mention of CISS effect. [34][35][36][37][38][39][40][41][42] For the sake of completeness, it should be noted that magnetic effects in achiral semiconductors are known to be very weak. [43] Here, we report the design, synthesis, and characterization of enantiopure semiconductors with the goal of studying CISS effect in OFETs, aiming at contributing to its understanding.…”

Chiral diketopyrrolopyrrole dyes showing light emission in solid and aggregate states

“…Molecular and polymeric p-conjugated organic materials are key components in the development of organic electronic devices such as systems for energy harvesting, organic light emitting diodes (OLEDs) and transistors (OFETs). [1][2][3][4][5] The advantages of using organic compounds in these optoelectronic technologies include relatively low cost of fabrication, easy processing, and the tunability of the optoelectronic properties (optical absorption, radiative and/or non-radiative relaxation, exciton diffusion, and charge transport) by tailoring the molecular structures and directing the supramolecular organization, via expedient chemical synthesis. [6][7][8][9][10] The introduction of molecular chirality into organic optoelectronic materials is currently receiving considerable attention as it can help drive preferential packing modes in the solid state, and also because the interplay between chirality and optoelectronic features can generate chiroptical, magnetochiral and spin-selective properties, which pave the way to a number of feasible innovative technologies ranging from cryptography, quantum photonics, threedimensional imaging, chiral probes, stereoscopic and/or anti-glare displays with enhanced external efficiency.…”

Electret Molecular Configuration Induced Programmable Photonic Memory for Advanced Logic Operation and Data Encryption

“…Notably, although helicenes have been reported previously, most studies have focused on their chiral-induced assemblies and optical property changes rather than the chiralinduced optoelectrical device performance with respect to their linear counterparts. [38][39][40][41] Here, H-PDI is synthesized in a good yield according to a previous report (Figure 1a; and Table S1, Supporting Information). [42] In detail, N-(nbutyl)-4-methylhomophthalimide anhydride (I) as a key start material is synthesized from a commercially available ethyl 2-(5-methoxy-1-oxo-2,3-dihydro-1H-inden-2-yl)-2-oxoacetate in four steps, following by Knoevenagel condensation with terephthalaldehy yields precursors (4E,4"E)-4,4"-(1,4phenylenebis(methanylylidene)bis(2-butyl-6-methoxyisoquinoline-1,3(2H,4H)-dione) (III).…”