4.7 Review

Functional flexible molecular crystals: intrinsic and mechanoresponsive properties

Journal

CRYSTENGCOMM
Volume 23, Issue 34, Pages 5686-+

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ce00388g

Keywords

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Funding

  1. Japan Society for the Promotion of Science (JSPS) KAKENHI [19H02784, 19H04555, 17H06370]
  2. JSPS KAKENHI [20K05535, 19H04677, 19K05403, 18H02052, 17H05171, 19H04604, 20H04484]
  3. Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials research program of the Network Joint Research Center for Materials and Devices
  4. Grants-in-Aid for Scientific Research [18H02052, 17H05171, 19K05403, 19H02784, 19H04677, 19H04604, 19H04555, 20K05535, 20H04484] Funding Source: KAKEN

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Recent interest in functional flexible molecular crystals has the potential to provide unique optoelectronic applications and stimuli-responsive chemistry. The flexible behavior of molecular crystals, such as stress-induced response shape deformation, is another new feature realized by molecular and crystal structure design strategies. These molecular crystals with mechano-responsive properties have potential powerful applications, such as in wearable devices.
Recent interest in functional flexible molecular crystals has the potential to provide unique optoelectronic applications and stimuli-responsive chemistry. In crystal engineering, the designing of crystal structures from molecular structures has resulted in various functional molecular crystals for controlling photons, phonons, electrons, and magnons. The flexible behavior of molecular crystals, such as stress-induced response shape deformation, is another new feature recently realized by molecular and crystal structure design strategies. Such flexible molecular crystals with crystal features, such as intrinsic and mechano-responsive properties, have potential powerful applications, such as in wearable devices. Herein, the concept of functional flexible molecular crystals is highlighted, demonstrating the intrinsic properties of mechanical deformability and mechano-responsiveness induced by changes in crystal shape. Some outstanding examples of the light emission and electrical conduction properties of functional flexible molecular crystals are discussed. Key insight into similar future developments that offer intrinsic and mechanical stimuli-responsive behavior toward flexible molecular crystal devices is also provided.

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