From chromic switchable hydrazones to smart materials

Molecular switching chromic compounds can be defined as molecular systems which can reversibly change their molecular structures in response to one or more external stimuli, such as irradiation, magnetic or electric field, chemicals or gases, light, heat, mechanical effects, or changes in pH. Hydraz...

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Bibliographic Details
Published in:Materials chemistry and physics 2020-11, Vol.254, p.123456, Article 123456
Main Author: Khattab, Tawfik A.
Format: Article
Language:English
Subjects:
Chemical sensor
Chemical sensors
Chromism
Diagnostic software
Diagnostic systems
Electric fields
Hazardous areas
Hydrazone
Hydrazones
Molecular structure
Molecular switch
Organic chemistry
Smart materials
Switching
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Summary:Molecular switching chromic compounds can be defined as molecular systems which can reversibly change their molecular structures in response to one or more external stimuli, such as irradiation, magnetic or electric field, chemicals or gases, light, heat, mechanical effects, or changes in pH. Hydrazones represent a versatile category of organic molecular systems. Getting switchable molecular hydrazones to construct macroscopic smart architectures is still an attractive challenge. Molecular switching hydrazone chemical sensors refer to diagnostic tools that can avoid a person (or a product) from a certain threat due to the exposure to hazardous elements or environment. Thus, hydrazone-based switchable molecular chemical sensors present a protection tool against the risk of possible illnesses, severe injuries or life threatening. [Display omitted] •Synthesis of molecular switching chromic hydrazones is described.•Stimuli-responsive performance to changes in pH, light, and heat is reported.•Macroscopic smart architectures have been developed from switchable molecular hydrazones.•Hydrazone-based sensors present a protection tool against environmental and health risks.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2020.123456