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Transition-Metal-Free Polymerization of Bromoalkynes and Phenols
journal contribution
posted on 2019-04-02, 17:07 authored by Jie Zhang, Jing Zhi Sun, Anjun Qin, Ben Zhong TangExploration of efficient and powerful
polymerization methodologies
is of crucial importance for polymer science. Among the established
polymerization methodologies, the polymerization of internal alkynes
is less developed and still in its infancy stage. In this work, a
new polymerization of internal alkynes of bromoalkynes and phenols
is established, and polymers with high weight-average molecular weights
(up to 47 600) are obtained in excellent yields (up to 95.2%)
in as short as 1 h without using a complex transition-metal catalytic
system. The resultant polymers possess good solubility, exhibit high
thermal stability, and could display typical aggregation-induced emission
(AIE) characteristics upon introduction of tetraphenylethylene, a
typical AIE-active luminogen. Moreover, the polymers could be post-modified
by a thiophenol derivative because they contain bromovinyl groups
in each repeating unit, enabling it to possess a higher refractive
index than that of the pristine one. Therefore, it displays a convenient
platform for polymer functionalization. This work not only establishes
a new polymerization of bromoalkynes and phenols but also provides
a powerful strategy for the preparation and modification of functional
polymers under mild reaction conditions without using transition-metal
catalysts.
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Keywords
exhibitreaction conditionsthiophenolcharacteristicbromoalkyneyieldAIE-active luminogenweight-averagebromovinyl groupspolymerization methodologiesintroductionstrategyplatformmethodologyphenolstabilitytetraphenylethyleneimportancesolubilitymodificationpreparationPhenols ExplorationTransition-Metal-Free Polymerizationaggregation-induced emissionpost-modifiedalkynetransition-metal catalystsBromoalkyne1 hpolymer functionalizationinfancy stagepolymer sciencedisplay
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