By Igor F Perepichka; Dmitrii F Perepichka
Read or Download Handbook of Thiophene-Based Materials : Applications in Organic Electronics and Photonics (2-Volume Set) PDF
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Extra resources for Handbook of Thiophene-Based Materials : Applications in Organic Electronics and Photonics (2-Volume Set)
7). No microphase separation was observed by transmission electron microscopy (TEM) measurements, probably due to the low molecular weight and small volume fraction of the oligothiophene moiety compared with that of polystyrene in the copolymer system . 8) . 32 endowed with a polystyrene chain at other α-terminus with the bis-Mannich base 5,5 -bis[3-(dimethylamino)propionyl]-2,2 :5 ,2 -terthiophene. 34 is self-assembled into spherical, micellar structures with average diameters of 12 nm, which corresponds to about 60 block copolymer molecules per aggregate.
38 (n = 2, 3) were prepared by reaction of an amino-terminated cholesterol derivative and 5-bromo-2-thiophenecarboxylic acid chloride followed by Stille-type coupling with distannylated bi- and terthiophenes to build up the oligothiophene backbone. 38 (n = 4) was prepared by reaction of the same cholesterol derivative with 5-bromo-2,2 -bithiophene-5 -carboxylic acid chloride followed by Stille coupling with distannylated bithiophene. These oligothiophenes act as organogelators for various organic solvents and show unique thermochromic behavior through sol–gel phase transition.
By esteriﬁcation of 5-carboxy-2,2 -bithiophene with 1,9-dihydroxynonane or 1,3-dihydroxymethylbenzene, corresponding bridged bithiophenes were obtained as building blocks. 67 in 11 % yield. The authors suggested that the presence of diethylphosphate binding groups at the α-termini may possibly make these compounds of use as electroactive surfactants for semiconducting nanoparticles and organic electronics. 14 In a recent report, Collard et al. 1]undecane core . Oneand two-electron oxidation of these stacked oligomers afforded radical cations and dications that served as models for polarons and bipolarons in p-doped conjugated polymers and demonstrated the effect of π-stacking on the electronic structure of these species.