TY - JOUR
T1 - Tunable Stimuli-Responsive Color-Change Properties of Layered Organic Composites
AU - Takeuchi, Machi
AU - Gnanasekaran, Karthikeyan
AU - Friedrich, Heiner
AU - Imai, Hiroaki
AU - Sommerdijk, Nico A.J.M.
AU - Oaki, Yuya
N1 - Funding Information:
The authors thank M. M. R. M. Hendrix for help in in situ XRD analysis. This work was partially supported by Iketani Science and Technology Foundation (Y.O.), Izumi Science and Technology Foundation (Y.O.), Asahi Glass Foundation (Y.O.), and TOBITATE! Young Ambassador Program of Japan Public-Private Partnership Student Study Abroad Program (M.T.).
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/11/7
Y1 - 2018/11/7
N2 - Stimuli-responsive properties of soft materials originate from dynamic structure changes. Layered polydiacetylene (PDA) shows color-change properties with the application of external stimuli, such as thermal and mechanical stresses. Layered organic materials possessing intercalation capabilities and dynamic properties have potentials for tuning their structures and properties by the intercalated guests. A variety of sensing and imaging devices can be developed by control of the stimuli responsivity. Here, the key structures, processes, and mechanisms for tuning the stimuli-responsive color-change properties of layered PDA are studied by in situ analyses with heating and cooling. The in situ analyses indicate that heating initiates thermal motion of the alkyl side chains of the PDA main chain in the host layers around 60 °C, regardless of the type of intercalated guests. Further heating induces torsion of the PDA main chain leading to color changes at different temperatures, depending on the types of the intercalated guest. Then, the layered structure is irreversibly deformed with lowering the crystallinity. The results indicate that the stimuli-responsive color-change properties are controlled by the rigidity of the layered structures consisting of the host layers and guests. The control strategy based on rigidity tuning can be applied to a variety of soft materials with stimuli responsivity.
AB - Stimuli-responsive properties of soft materials originate from dynamic structure changes. Layered polydiacetylene (PDA) shows color-change properties with the application of external stimuli, such as thermal and mechanical stresses. Layered organic materials possessing intercalation capabilities and dynamic properties have potentials for tuning their structures and properties by the intercalated guests. A variety of sensing and imaging devices can be developed by control of the stimuli responsivity. Here, the key structures, processes, and mechanisms for tuning the stimuli-responsive color-change properties of layered PDA are studied by in situ analyses with heating and cooling. The in situ analyses indicate that heating initiates thermal motion of the alkyl side chains of the PDA main chain in the host layers around 60 °C, regardless of the type of intercalated guests. Further heating induces torsion of the PDA main chain leading to color changes at different temperatures, depending on the types of the intercalated guest. Then, the layered structure is irreversibly deformed with lowering the crystallinity. The results indicate that the stimuli-responsive color-change properties are controlled by the rigidity of the layered structures consisting of the host layers and guests. The control strategy based on rigidity tuning can be applied to a variety of soft materials with stimuli responsivity.
KW - in situ analyses
KW - intercalation
KW - layered materials
KW - organic–inorganic composites
KW - stimuli-responsive materials
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U2 - 10.1002/adfm.201804906
DO - 10.1002/adfm.201804906
M3 - Article
AN - SCOPUS:85053507947
SN - 1616-301X
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 45
M1 - 1804906
ER -