Organic Letters, Год журнала: 2025, Номер unknown
Опубликована: Июнь 5, 2025
Язык: Английский
ChemistryEurope, Год журнала: 2025, Номер unknown
Опубликована: Март 3, 2025
Abstract The properties of thermally activated delayed fluorescence (TADF) chromophores are highly dependent on the molecular design. choice donor (D) and acceptor (A) group as important π ‐linker substitution positions. Herein, influence regioisomerism through pattern 9,9’‐spirobi[fluorene] (SBF) TADF characteristics is investigated. In our studies, phenothiazine carbonitrile have been chosen D A groups, their varied among 2, 2’, 7 7’ positions spiro core resulting in two pairs regioisomers. Depending these changes, physical differ from one to another with changes emission wavelength maximum, photoluminescence quantum yield (PLQY), lifetime thermal stability. Three investigated molecules exhibit solid phase thin films crystals.
Язык: Английский
Процитировано
0
Aggregate, Год журнала: 2025, Номер unknown
Опубликована: Апрель 16, 2025
ABSTRACT Information security protection has become a fundamental issue in the human life, national security, and social stability, which is enabled through use of multi‐responsive materials. Ideal materials are operated with visible to near infrared light, exhibit large separation absorption bands, functional by isomerization, posing an unmet challenge. Here, series visible‐light‐operated molecular photoswitches, ( E )‐1‐acetyl‐2‐((4‐(diphenylamino) phenyl) imino) indolin‐3‐one, its derivatives PIO‐01/02/03/04/05 ), featuring near‐infrared second aggregation‐induced emission (AIE) impressive acid/base‐driven switching, constructed via twisted intramolecular charge transfer (TICT) subsequent / Z isomerization strategies. In addition, protonation not only endows these molecules (Δ λ max ) over 100 nm, but also can be used as independent input altering light response. Based on calculation studies advanced spectroscopic techniques, we provide intricate interplay switching behavior their photochemical properties. The optimized compound PIO‐01 shows significant applications multi‐color, multi‐patterning display, transient information recording erasing, dual‐mode encryption‐decryption ternary code.
Язык: Английский
Процитировано
0
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162788 - 162788
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Angewandte Chemie, Год журнала: 2025, Номер unknown
Опубликована: Апрель 26, 2025
Abstract The progress in organic afterglow materials has drawn significant attention due to their extensive applications fields such as optoelectronics, anti‐counterfeiting, and bioimaging. Nonetheless, a general limitation of is short emission lifetimes, typically spanning from milliseconds seconds, which creates substantial challenge developing day‐long (DOA). In this study, DOA system demonstrated through the incorporation electron donor/acceptor exciplexes. Polyethylene naphthalate used for both acceptor charge storage units, coupling with spirobifluorene‐carbazole derivative donor, providing effective separations under UV‐light sunlight excitation. resulting polymers demonstrate an exceptional bluish‐green that endures over 28 h ambient conditions, setting new record longest duration polymeric materials. Moreover, DOA‐doped polymers, films fibers, exhibit outstanding flexibility transparency, making them highly suitable flexible technologies wearable devices.
Язык: Английский
Процитировано
0
Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown
Опубликована: Апрель 26, 2025
Abstract The progress in organic afterglow materials has drawn significant attention due to their extensive applications fields such as optoelectronics, anti‐counterfeiting, and bioimaging. Nonetheless, a general limitation of is short emission lifetimes, typically spanning from milliseconds seconds, which creates substantial challenge developing day‐long (DOA). In this study, DOA system demonstrated through the incorporation electron donor/acceptor exciplexes. Polyethylene naphthalate used for both acceptor charge storage units, coupling with spirobifluorene‐carbazole derivative donor, providing effective separations under UV‐light sunlight excitation. resulting polymers demonstrate an exceptional bluish‐green that endures over 28 h ambient conditions, setting new record longest duration polymeric materials. Moreover, DOA‐doped polymers, films fibers, exhibit outstanding flexibility transparency, making them highly suitable flexible technologies wearable devices.
Язык: Английский
Процитировано
0
Chemical Science, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
The first example of tuning the energetics thermally activated delayed fluorescence (TADF) molecules to access anti-Kasha dual-emission and room-temperature phosphorescence materials through a strategy for structural modification is developed here. To rapidly construct library structurally diverse carbonyl-bridged triarylamine-based TADF materials, copper-mediated cyclization heterocycles 2-bromobenzoic acids was further time. Novel exhibit distinct white light emission with CIE coordinates (0.32, 0.32) in solid film can be fabricated into low-cost robust organic LEDs. Ultralong room temperature (URTP) displayed cyan afterglow up seven seconds lifetime 508.8 ms could used encryption.
Язык: Английский
Процитировано
0
Organic Letters, Год журнала: 2025, Номер unknown
Опубликована: Июнь 5, 2025
Язык: Английский
Процитировано
0