Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Pd-Catalysed Direct Arylation Polymerisation for Synthesis of Low-Bandgap Conjugated Polymers and Photovoltaic Performance.Quality Control of Tricyclohexylphosphonium tetrafluoroborate.
Low-bandgap conjugated copolymers based on a donor-acceptor structure were synthesized via palladium-complex catalyzed direct arylation polymerization Initially, we report the optimization of the synthesis of poly(cyclopentadithiophene-alt-benzothiadiazole) (PCPDTBT) formed between cyclopentadithiophene and dibromobenzothiadiazole units. The polymerization condition was optimized, which affords high-mol.-weight polymers of up to Mn = 70 k using N-methylpyrrolidone as a solvent. The polymers are used to fabricate organic photovoltaic devices and the best performing PCPDTBT device exhibits a moderate improvement over devices fabricated using the related polymer via Suzuki coupling. Similar polymerization conditions were applied for other monomer units.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem