Single‐Fluorophore‐Based Organic Crystals with Distinct Conformers Enabling Wide‐Range Excitation‐Dependent Emissions

Abstract

Achieving wide-range tunable emission colors, especially in the solid state of single-fluorophore materials, remains a significant challenge. Herein, we report a molecular design strategy that affords wide-range excitation-dependent emissions spanning over � 230 nm in crystalline states. Under the donor-π-acceptor configuration, we judiciously choose a rotatable acceptor fragment, o-carborane, to enrich conformational diversities in the crystalline state and generate conformationdependent multicolor emissions. We further show that this molecular platform is generalizable in creating crystalline materials with multicolor emissions. Based on these materials, a high-capacity information storage device and a finite-state machine were fabricated to showcase multicolor displays and information storage.

Excitation‐Dependent Multicolour Luminescence of Organic Materials: Internal Mechanism and Potential Applications

“…Recently, based on multicolour luminescence, a high-capacity information storage device and a finite-state machine were well demonstrated with an o-carborane derivate. [37] Also, An and co-workers constructed branched organic heterostructures including one fluorescer and one metal-free ultralong organic phosphor, which were used for dual anti-counterfeiting due to the Ex-de phenomenon. [38] Clearly, multi-…”

Excitation‐Dependent Multicolour Luminescence of Organic Materials: Internal Mechanism and Potential Applications

“…Recently, based on multicolour luminescence, a high-capacity information storage device and a finite-state machine were well demonstrated with an o-carborane derivate. [37] Also, An and co-workers constructed branched organic heterostructures including one fluorescer and one metal-free ultralong organic phosphor, which were used for dual anti-counterfeiting due to the Ex-de phenomenon. [38] Clearly, multi- colour luminescence materials can serve as information carriers for encrypted data storage and anti-counterfeiting, which can improve the performance of current encryption applications.…”

“…Then, a comparison with the Morse code meter could be used to obtain the encrypted information “Chemistry.” Impressively, under water and heat stimuli, the Morse code was erased andregenerated, respectively, endowing it with more confidentiality. Recently, based on multicolour luminescence, a high‐capacity information storage device and a finite‐state machine were well demonstrated with an o ‐carborane derivate [37] . Also, An and co‐workers constructed branched organic heterostructures including one fluorescer and one metal‐free ultralong organic phosphor, which were used for dual anti‐counterfeiting due to the Ex‐de phenomenon [38] .…”

Synergetic Conformational Regulations in Ground and Excited States for Realizing Stimulus-Responsive and Wide-Tuning Room-Temperature Phosphorescence

“…Organic multicolor luminescent materials with tunable emissions have attracted considerable attention due to their potential applications in multicolor displays, anticounterfeiting, information encryption, and sensing . To realize multicolor luminescence in single emitters, various fundamental theories and mechanisms have been established, such as excited-state intramolecular proton transfer, excimer, conformational change, and anti-Kasha’s rule .…”