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Dithieno[3, 2‐b:2′,3′‐d]arsole is a molecule with a high oxidation potential (>1.2 V vs. Ag/AgCl) whose polymerization has not been achieved in common organic electrolytic solutions. Herein, we report the electropolymerization of dithieno[3, 2‐b:2′,3′‐d]arsole, which was performed in a dichloromethane solution using the trifluoroborate diethyl ether complex (BF3−OEt2) as an electrolyte. Under these conditions, the oxidation potential of dithieno[3, 2‐b:2′,3′‐d]arsole decreased to 0.5 V. The potential‐sweep electropolymerization of this molecule afforded an insoluble polymerized film on indium tin oxide or Pt working electrodes. The polymer film was subjected to X‐ray photoelectron spectroscopy analysis and the corresponding spectra revealed the presence of H, C, S, and As, which are the constituent elements of the monomer. Moreover, the polymer resulted to be a low band gap material according to the low energy band observed in its absorption spectra. Setting an example: electropolymerization of dithieno[3, 2‐b:2′,3′‐d]arsole is successfully carried out. This is the first example of electropolymerization of an arsole monomer and fabrication of an arsole homopolymer. [ABSTRACT FROM AUTHOR]

Abstract: In π‐conjugated polymers (πCPs), crystallinity and fluorescence typically exhibit a trade‐off relationship. Here, we have synthesized a highly crystalline and fluorescent π‐conjugated polymer with a simple alternating structure of 1,2,4,5‐tetrafluorophenylene and 3,3′‐dihexyl‐2,2′‐bithiophene units. In film, the polymer exhibited efficient red‐colored fluorescence, an improved quantum yield (Φsol=13 %→Φfilm=23 %) and a crystalline structure. Interestingly, supramolecular gel formation occurred in appropriate solvents, and the macrostructure and fluorescence properties of the gel could be directly controlled by the choice of the solvent. The polymer self‐assembled into a spherical form that exhibited red fluorescence in non‐aromatic solvent (1,2‐dichloroethane) and into a fibrous form that exhibited yellow fluorescence in aromatic solvent (mesitylene). [ABSTRACT FROM AUTHOR]

A novel polyfluorene having an N-alkylimine group at 9-position, P1, was synthesized through Suzuki-Miyaura coupling polymerization with bis(pinacolato)diboron. This polymer showed good solubility in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran and toluene. Moreover, this polymer exhibited good film-forming ability. The alternating copolymer, P2, was also synthesized by Suzuki-Miyaura coupling polymerization with 9,9-dioctylfluorene-2,7-diboronic acid (1,3-propandiol) ester. These polymers exhibited characteristic optical behaviors. The absorption spectrum of P2 showed intramolecular charge transfer interaction due to the existence of the imine electron-acceptor moiety at 9-position and showed green fluorescence both in organic solvent and in film. Interestingly, the absorption spectra of P1 film were bathochromically shifted relative to those measured in solution. [ABSTRACT FROM AUTHOR]

Abstract: Selective anodic chlorination of a poly(3-hexylthiophene) was successfully carried out by electrochemical polymer reaction. NMR and EDX analyses revealed the selective and sufficient substitution of chlorine atom at the 4-position of the repeating thiophene ring. GPC measurement of the polymer before and after electrolysis indicated that neither decomposition nor propagation of the polymer occurred even after passage of the excess charge. The optical and electrochemical properties of the obtained chlorinated polymer were investigated in detail. [Copyright &y& Elsevier]

Anodic fluorodesulfurization of a poly(fluorene) derivative coated on a Pt electrode was successfully carried out in an ionic liquid hydrogen fluoride salt, yielding a alternating copolymer containing a difluorofluorene moiety. [ABSTRACT FROM AUTHOR]

The Cover Feature illustrates film fabrication via electropolymerization of dithieno[3,2‐b:2′,3′‐d]arsole with the assistance of Lewis acid, BF3. Dithienoheterole is an important backbone to incorporate heteroatoms into conjugated systems. This is the first example of the electropolymerization of dithienoheteroles. More information can be found in the Communication by H. Imoto et al. on page 3357 in Issue 22, 2018 (DOI: 10.1002/celc.201801069). [ABSTRACT FROM AUTHOR]

An efficient synthetic route to cyclic polymers has been demonstrated through atom-transfer radical polymerization (ATRP) and subsequent ring-closing metathesis (RCM) reaction. Thus, telechelic poly(methyl acrylate) (PMA) having allyl groups was synthesized by ATRP of methyl acrylate with a difunctional initiator and the subsequent end-capping reaction with allyltributyltin. The following RCM reaction proceeded even under dilution in the presence of the Grubbs catalyst to give a cyclic PMA in a high yield. [ABSTRACT FROM AUTHOR]