An ESIPT-based fluorescent switch with AIEE, solvatochromism, mechanochromism and photochromism

Abstract

In this study, we report a newly synthesized molecule 1via linking a benzothiazole to rhodamine, which could exhibit AIEE, unique acidichromism and solvatochromism in solution, fascinating photochromism in a polymer matrix, intriguing mechanochromism in solid state and remarkable piezochromism in the crystal.

Polarity‐Induced Excited‐State Intramolecular Proton Transfer (ESIPT) in a Pair of Supramolecular Isomeric Multifunctional Dynamic Metal–Organic Frameworks

“…[1][2][3] During this ultrafast photochemical process, an additional tautomeric form of the fluorophore is originated through intersystem crossing assisted by an intermolecular proton-transfer process. [12] Besides all these smart applications, ESIPT systemsr esponsive to externals timuli can also be useful as fluorescentm oleculars witches, [13] which can be patternedin the fabrication of optical devices related to data recording, photodisplays, and light isolators(or light filters). [1][2][3] For theser easons, materials that exhibit the ESIPT phenomenon have been successfully utilized in different optoelectronic applications, for example, in solar concentrators, [5] UV stabilizers, [6] photopatterning, [7] opticalm emory devices, [8] fluorescencei maging, [9] white-light emitters, [10,11] and smarto pticalw riters.…”

“…Upon excitation, thet wo tautomeric forms give rise to two broad peaks. [13] If the ease of protont ransfer in an ESIPT-driven system can be controlled by externals timuli, then the emission wavelengthr egion can be effectively changed, [4,14,15] and by virtue of this fact, the system coulde asily serve for all the aforesaid purposes.I nt his context, solvent polarity may be as mart way to control the proton-transfer process, [4,14] and in this way, such as olvatochromic ESIPT system could be utilized as polarity-induced fluorescentm olecular switches. [12] Besides all these smart applications, ESIPT systemsr esponsive to externals timuli can also be useful as fluorescentm oleculars witches, [13] which can be patternedin the fabrication of optical devices related to data recording, photodisplays, and light isolators(or light filters).…”

“…[12] Besides all these smart applications, ESIPT systemsr esponsive to externals timuli can also be useful as fluorescentm oleculars witches, [13] which can be patternedin the fabrication of optical devices related to data recording, photodisplays, and light isolators(or light filters). [16] To date, ac onsiderable research on the ESIPT process has been carriedo ut with respect to real-time spectroscopic behavior [1][2][3][13][14][15] andt heoretical understanding [1][2][3][4]17] to identify the structure-property relationshipso fE SIPT systems. [15] Moreover, these polarity-sensitive materials could also be useful to chemically determine the polarityo fa nu nknown solvents ystem.…”

“…[1][2][3] For theser easons, materials that exhibit the ESIPT phenomenon have been successfully utilized in different optoelectronic applications, for example, in solar concentrators, [5] UV stabilizers, [6] photopatterning, [7] opticalm emory devices, [8] fluorescencei maging, [9] white-light emitters, [10,11] and smarto pticalw riters. [12] Besides all these smart applications, ESIPT systemsr esponsive to externals timuli can also be useful as fluorescentm oleculars witches, [13] which can be patternedin the fabrication of optical devices related to data recording, photodisplays, and light isolators(or light filters). [13] If the ease of protont ransfer in an ESIPT-driven system can be controlled by externals timuli, then the emission wavelengthr egion can be effectively changed, [4,14,15] and by virtue of this fact, the system coulde asily serve for all the aforesaid purposes.I nt his context, solvent polarity may be as mart way to control the proton-transfer process, [4,14] and in this way, such as olvatochromic ESIPT system could be utilized as polarity-induced fluorescentm olecular switches.…”

“…[12] Besides all these smart applications, ESIPT systemsr esponsive to externals timuli can also be useful as fluorescentm oleculars witches, [13] which can be patternedin the fabrication of optical devices related to data recording, photodisplays, and light isolators(or light filters). [13] If the ease of protont ransfer in an ESIPT-driven system can be controlled by externals timuli, then the emission wavelengthr egion can be effectively changed, [4,14,15] and by virtue of this fact, the system coulde asily serve for all the aforesaid purposes.I nt his context, solvent polarity may be as mart way to control the proton-transfer process, [4,14] and in this way, such as olvatochromic ESIPT system could be utilized as polarity-induced fluorescentm olecular switches. [15] Moreover, these polarity-sensitive materials could also be useful to chemically determine the polarityo fa nu nknown solvents ystem.…”