Tetraphenylethylene substituted thienothiophene and dithienothiophene derivatives: synthesis, optical properties and OLED applications

Abstract

TPE units at the periphery of two TTs and a DTT affect the structures, properties and OLED characteristics of these three synthetically easily accessible novel conjugated compounds for materials chemistry.

Copolymers of 4‐thieno[3,2‐b]thiophen‐3‐ylbenzonitrile with anthracene and biphenyl; synthesis, characterization, electronic, optical, and thermal properties

“…Nerveless, both polymers had reasonably lower band gaps suitable for electronic applications. [32][33][34][35] Solvatochromism of P1 and P2 were investigated in five different solvents, having different polarities from polar to nonpolar; DMF, chloroform, THF, dichloromethane, and toluene, respectively (Luminogen concentration: 10 μM). Both polymers were found to be quite soluble in these solvents, which could be attributed to presence of the benzonitrile moieties.…”

“…Moreover, presence of two sulfur atoms makes it electron-rich, enabling to be used as electron donating moiety in construction of polymeric materials. [6][7][8][9][10][11][12] Anthracene with low C-H ratio and a highly conjugated planar structure, has attracted considerable attention for organic polymeric materials. Having three rigid fused benzene rings, the least conjugated but the most soluble and the most stable member of acenes, it has been given high consideration for organic polymeric materials.…”

“…TTs, in general, have four isomers formed through the orientations of the sulfur atoms of the thiophene rings, among which TT is the most widely used one, as it provides continuous conjugation through its two fused thiophenes. Moreover, presence of two sulfur atoms makes it electron‐rich, enabling to be used as electron donating moiety in construction of polymeric materials 6–12 …”

Photoinduced step‐growth polymerization of thieno[3,4‐b] thiophene derivatives. The substitution effect on the reactivity and electrochemical properties

“…[ 10 ] Poly(thienothiophene)s (PTTs) are a class of thiophene based polymers possessing special advantages due to their superior electronic properties, flexibility of the backbone, thermal, and mechanical stabilities. [ 11 ] PTTs have gained a great deal of interest especially in the last few decades, not only because of their facile synthetic routes, but also for their diverse application in optoelectronics [ 12 ] and in cathode‐active materials as organic electrolyte batteries. [ 13 ] Due to the extended conjugation in the structure, these polymers have lower band gaps which is a crucial requirement for such applications.…”

A Bifunctional Bulky Thienothiophene Derivative; Synthesis, Electronic‐Optical Properties and OLED Applications

“…This is due to their electron rich, flat, rigid, and good electron delocalized character. [27][28][29][30][31][32][33] In this study, as a continuation of our work on TTs, we focused on the synthesis and photophysical characterization of a bifunctional bulky TT molecule, TT-TPA-TPE3 (Schemes 1 and 2), composed of a TT as an electron transporter and linker, TPA as an electron donating and hole transporting unit, and three TPEs to provide the resultant material with AIE charter.…”