56412-11-4

Upstream product

• 142-30-3 2,5-dihydroxy-2,5-dimethyl-3-hexyne 
• 392662-65-6 3,6-dibromothiophene[3,2-b]thiophene 
• 18815-74-2 zinc methyl bromide 
• 3725-05-1 2,5-dimethylhexa-1,5-dien-3-yne 

Downstream Products

• 180903-84-8 3,6-Dimethyl-2-methylselanyl-thieno[3,2-b]thiophene 
• 60749-72-6 3,6-Dimethyl-2,5-dihydrothieno<3,2-b>thiophen-2,5-dion 

Relevant academic research and scientific papers

Insertion of Pt into C-H and C-S bonds of thiophene derivatives. The X-ray crystal structure of a thiaplatinacycle of 3,6-dimethylthieno [3,2-b]thiophene

Treatment of the zerovalent platinum complex [Pt(PEt3) 4] with 3,6-dimethylthieno[3,2-b]thiophene leads to a six-membered, approximately planar thiaplatinacycle, which has been characterised spectroscopically and by a single crystal X-ray determination. The reaction of [Pt(PEt3)4] with 2,2′-bithiophene and 1-methyl-2-(2-thienyl)pyrrole produced two types of products, thiaplatinacycles resulting from C-S insertion and platinum(II) hydrides arising from C-H insertion. These complexes were characterised spectroscopically.

(Super)gelators derived from push-pull chromophores: Synthesis, gelling properties and second harmonic generation

The present work takes advantage of the self-assembly process occurring along organogelation, to organize Second Harmonic Generation (SHG) active chromophores. To do so, three push-pull chromophores endowed with a dodecyl urea chain were synthesized and characterized. Their organogelating properties were studied in a wide range of solvents. Despite similar architectures, these derivatives exhibit very different gelling properties, from supergelation to the absence of gelling ability. The utilization of the Hansen solubility parameters allows for observing clear relationships between the gelled solvents and critical gelation concentrations. By evaporating the solvents from the organogels, xerogel materials were prepared and systematically studied by means of optical and electron microscopy as well as SHG microscopy. These studies demonstrate the critical role of the solvent over material structuring and allow generalizing the approach exploiting organogelation as a structuring tool to spontaneously organize push-pull chromophores into SHG-active materials.

Tunable charge-transport polarity in thienothiophene-bisoxoindolinylidene-benzodifurandione copolymers for high-performance field-effect transistors

N-Type semiconducting polymers are important materials for modern electronics but limited in variety and performance. To design a new n-type polymer semiconductor requires a judicious trade-off between structural parameters involving both backbone and side-chain modifications. The appeal of backbone modification emerges from the tunable electronic structures and conformational control. To control these effects typically needs installation of substituents such as halogens. In a polymer system with high molecular complexity, a few common substituents such as methyl and methoxy groups are an underdeveloped area of chemical space. In this work, we study the substituent effects in methyl- and methoxy-substituted thienothiophene-bis(oxoindolinylidene)benzodifurandione copolymers on field-effect performances. The two substituents affect the conformations of the backbone and increase the frontier orbital energy levels of the polymers. Using such electronic effects, we are able to tune the charge transport behaviors from n-channel to ambipolar. This strategy allows further substitution patterns for backbone modification in other polymer semiconductors.

Fluorene copolymer, method for preparation and use thereof

A fluorene copolymer, method for preparation thereof, and use thereof are provided. Said fluorene copolymer comprises copolymer represented by formula (I), wherein R1-R2, R5-R8 are selected from H or C1-C20 alkyl, R3-R4 are selected from H, C1-C20 alkyl, C1-C20 alkoxyl, phenyl or phenoxyl, x+y=1, x≠0, y≠0; n is an integer of 1 to 200, Ar1 is thiophene unit-containing group. On account of thiophene unit and thienopyrazine unit, the fluorene copolymer has wide spectrum response range and favorable stability.

A ONE-POT SYNTHESIS OF SUBSTITUTED THIENOTHIOPHENES AND SELENOLOSELENOPHENES

Heating a mixture of 2,5-dimethyl-3-hexyne-2,5-diol (3a) with elemental sulfur in benzene at 190-200 deg C in an autoclave affords 3,6-dimethylthienothiophene (5a) in 26percent yield.The reaction provides a practical one-pot synthesis of several gr