Nickel(II) α‐Diimine Catalyst for Grignard Metathesis (GRIM) Polymerization

Abstract

A nickel α-diimine catalyst was used for Grignard metathesis (GRIM) polymerization of 2,5-dibromo 3-hexylthiophene and 2-bromo-5-iodo-3-hexylthiophene monomers. GRIM polymerization of 2-bromo-5-iodo-3-hexylthiophene generated regioregular polymers with molecular weights ranging from 3,000 to 12,000 g · mol(-1). The nickel α-diimine catalyst was also successfully used for the GRIM polymerization of a bulky benzodithiophene monomer.

Benzo[1,2‐b:4,5‐b′]dithiophene Building Block for the Synthesis of Semiconducting Polymers

“…[ 18 ] Hu and co-workers [ 19 ] reported the syn-synthesized (Scheme 10 ). [23][24][25][26] The BDT monomer with pentyl phenylethynyl substituents was synthesized from the commercially available 4-pentylphenyl acetylene and 4,…”

Poly(3-Hexylthiophene) Nanostructured Materials for Organic Electronics Applications

“…Numerous research efforts have been undertaken to modify the structure and function of P3HT materials via synthesis. [8][9][10][11][12][13][14][15][16] For example, the opto-electronic properties of P3HT can be improved by using regiospecific synthetic protocols that eliminate structural defects. 17 18 The coupling of the asymmetric 3-hexylthiophene monomer can result into four different regioisomers ( Fig.…”

Metal Free Acid‐Mediated Solid‐State Polymerization and Processability of Polymers Based on 3,4‐Alkylenedioxythiophenes

“…In oxidative polymerization, iron (III) catalysts are used to trigger the polymerization, which leads to iron bonding within the polymer backbone and even on extensive dedoping iron (III) still persisted, which was confirmed by a strong paramagnetic resonance (EPR) signal . Complexes based on transition‐metal catalysts such as nickel (Grignard metathesis, GRIM) and palladium (Stille, Suzuki‐Miyaura and Heck, etc.) are used in chemical cross‐coupling polymerization.…”