Solution-cast self-assembled films of perchlorate-doped oligo(3-methoxythiophene) showing a gold-like luster

Edge-on lamellar crystallization of oligo(3-methoxythiophene) in polyester matrix films and a gold tone development thereof

“…13 The current authors developed a gold-like luster film based on the high-molecular-weight oligomer oligo(3-methoxythiophene) (O3MeOT) obtained via chemical polymerization of 3methoxythiophene. 14 O3MeOT is soluble in several polar solvents and can be used to produce a gold-like luster coating with good film-forming properties and excellent aging stability on various substrates, including glass plate, polyethylene terephthalate film, and metal plate. O3MeOT is an oligomer consisting of an average of ten 3-methoxythiophene units bonded at the 2,5 positions, and elemental analysis has revealed 30% anion doping.…”

Oligo(3-methoxythiophene)s as Water-Soluble Dyes for Highly Lustrous Gold- and Bronze-like Metal-Effect Coatings and Printings

“…Recently, it was shown that a ClO 4 – -doped 3-methoxythiophene oligomer produced gold-like lustrous films while satisfying all of the aforementioned desiderata. 24 − 26 This oligomer is possibly the first nonmetallic material that is likely to be used during the industrial production of lustrous inks and paintings. However, the oligomer was solvated in either nitromethane or acetonitrile that are considered to be employee-unsafe.…”

“… 29 − 31 The aforementioned 3-methoxythiophene oligomer also forms self-organizing lamellar crystal structures similar to those of poly(3-alkylthiophene), which have been studied extensively. 24 − 26 However, this oligomer displays specific properties arising from compactness of the methoxy group, high levels of electron donation, and multiple supramolecular interaction points; the oligomer shows specific morphological, optical, and chemical properties different from those of poly(3-alkylthiophene). For example, the former has larger optical constants (refractive index and extinction coefficient) than the latter.…”

Chemical Events in Oligo(3-methoxythiophene) Coating Solutions and Their Effect on the Goldlike Coating Film Properties

“…Recently, we prepared high-molecular-weight oligo­(3-methoxythiophene) (weight-average molecular weight = 2.4 × 10 3 ), which, to the best of our knowledge, was the first compound to provide coating solutions in organic solvents. When applied to glass and polyester plates, these coating solutions formed goldlike lustrous films that were stable under ambient conditions for at least 1 year.…”