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Title: Controlled synthesis of ortho, para-alternating linked polyarenes via catalyst-transfer Suzuki coupling polymerization

Journal Article · · Polymer Chemistry
DOI:https://doi.org/10.1039/C8PY00070K· OSTI ID:1523761

A novel class of ortho, para-alternating linked polyarenes is synthesized via catalyst-transfer Suzuki coupling polymerization with Pd2(dba)3/t-Bu3P/p-BrC6H4COPh as initiator. Through a series of kinetic studies and MALDI-TOF analysis, the polymerization is shown to proceed in a chain-growth manner. The optical and thermal properties for the ortho, para-alternating linked polyarenes exhibit unusual molecular weight dependence. Thus, the polymer with lower molecular weight (Mn = 6300 g mol–1) emits green fluorescence whereas the one with higher molecular weight (Mn = 13 800 g mol–1) emits blue fluorescence under UV (λ = 360 nm) irradiation. Furthermore, an all-conjugated block copolymer containing a polyfluorene block and the ortho, para-alternating linked block is also successfully prepared, in a one-pot procedure. These results can provide a pathway to obtain polyarenes with precisely controlled structures, hence, desirable properties.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; LOIS# 7938
OSTI ID:
1523761
Alternate ID(s):
OSTI ID: 1435664
Journal Information:
Polymer Chemistry, Vol. 9, Issue 24; ISSN 1759-9954
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (2)

Intramolecular Catalyst Transfer over Sterically Hindered Arenes in Suzuki Cross‐Coupling Reactions journal July 2019
Conjugated oligomers with alternating heterocycles from a single monomer: synthesis and demonstration of electroluminescence journal January 2019

Figures / Tables (4)