Stimuli-fluorochromic smart organic materials

Abstract

This review highlights the developments in stimuli-fluorochromic π-conjugated solids beyond organometallic and organic light-responsive compounds, addressing the design strategies, mechanisms, limitations, challenges, and opportunities.

Tuning vibration-induced emission through macrocyclization and catenation

“…Smart organic materials with tunable and switchable luminescence have shown great potential for wide applications such as imaging, 1 sensors, 2 and optical displays. 3 Therefore, the development of novel luminogens which are sensitive to external stimuli, such as light, 4 solvent polarity, 5 solvent viscosity, 6 pH, 7 ambient temperature, 8 and pressure, 9 remains an attractive topic.…”

Precise Regulation the Multiemission Based on Soft Double Salt for Information Encryption

“…Supramolecular self-assembly plays a crucial role in a variety of research areas, including chemistry, material sciences, biology, and emerging multiple interdisciplines. − Particularly in functional luminescent materials fields, control of the assembly process of unordered monomolecules into highly ordered nano/microsized architectures, such as fibers, micelles, helices, and nanospheres, has attracted much attention in chemosensing, nonlinear optics, biolabeling, and anticancer applications. ,− This is because the intermolecular and/or intramolecular interactions also have a great effect on the construction and performance of these functional materials, especially in optical properties. ,,, Upon delicately controlling and balancing the noncovalent interactions, such as hydrogen bonding, electrostatic interactions, π–π stacking, van der Waals forces, and so on, stimuli-responsive materials could be obtained, which are sensitive to environmental stimuli, such as light, temperature, solvent composition, redox, acids/bases, static pressure, and so on. ,− In this regard, the supramolecular strategy mainly focuses on the regulation of the reversible self-assembly/disassembly processes of aggregates, along with the occurrence of the intriguing chromic phenomena. − …”

“…1,6−14 This is because the intermolecular and/or intramolecular interactions also have a great effect on the construction and performance of these functional materials, especially in optical properties. 1,2,15,16 Upon delicately controlling and balancing the noncovalent interactions, such as hydrogen bonding, electrostatic interactions, π−π stacking, van der Waals forces, and so on, stimuli-responsive materials could be obtained, which are sensitive to environmental stimuli, such as light, temperature, solvent composition, redox, acids/bases, static pressure, and so on. 5,17−26 In this regard, the supramolecular strategy mainly focuses on the regulation of the reversible self-assembly/disassembly processes of aggregates, along with the occurrence of the intriguing chromic phenomena.…”

Trimodal operation of a robust smart organic crystal

“…An optimal smart sensing device is precise, small, well-integrated, and can be networked with other components. 1,2 However, multifunctionality increases the number of internal components required to sense different stimuli and, therefore, requires a larger volume, which is disparate from the intended miniaturization of sensors for implementation in mobile smart devices, which requires reduced overall volume. 3 Multisensing devices incorporate multiple sensing units having different sensing functionalities, require complex, costly fabrication protocols, and suffer from difficulties with the physical or operational integration of the individual components.…”