The photoregulation of a mechanochemical polymer scission

Jumpei Kida, Keiichi Imato, Raita Goseki, Daisuke Aoki, Masakazu Morimoto and Hideyuki Otsuka ()
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Jumpei Kida: Tokyo Institute of Technology
Keiichi Imato: Tokyo Institute of Technology
Raita Goseki: Tokyo Institute of Technology
Daisuke Aoki: Tokyo Institute of Technology
Masakazu Morimoto: Rikkyo University
Hideyuki Otsuka: Tokyo Institute of Technology

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract Control over mechanochemical polymer scission by another external stimulus may offer an avenue to further advance the fields of polymer chemistry, mechanochemistry, and materials science. Herein, we demonstrate that light can regulate the mechanochemical behavior of a diarylethene-conjugated Diels–Alder adduct (DAE/DA) that reversibly isomerizes from a weaker open form to a stronger closed form under photoirradiation. Pulsed ultrasonication experiments, spectroscopic analyses, and density functional theory calculations support the successful photoregulation of the reactivity of this DAE/DA mechanophore, which is incorporated at the mid-chain of a polymer, and indicate that higher force and energy are required to cleave the closed form of the DAE/DA mechanophore relative to the open form. The present photoregulation concept provides an attractive approach toward the generation of new mechanofunctional polymers.

Date: 2018
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DOI: 10.1038/s41467-018-05996-7

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