Inorganic Building Unit Isomerization Engineering for Multicolor Room Temperature Phosphorescence DOI
Wenhai Song, Bolun Zhang, Lei Miao

и другие.

Small, Год журнала: 2024, Номер 21(6)

Опубликована: Дек. 29, 2024

Abstract Room temperature phosphorescence (RTP) materials have gained significant attention in current research. However, facile regulation of RTP color remains a great challenge. Here an “inorganic building unit (IBU) isomerization engineering” strategy is proposed to facilely regulate color. Four coordination polymers (CPs) with different packing structures from the same raw material are prepared. Among them, 1 has 2D layered structure, while 2 , 3, and 4 can be viewed as 3D framework isomers, which display wide‐range colors (505‐612 nm) ranging cyan red, optimal excitation wavelengths for 3 both located within visible light region. Detailed investigation reveals that IBU effectively regulates interaction between organic linkers, leading charge transfer (CT) processes inducing various emission. Additionally, color‐tunable doped calcium formate matrix in‐situ formed guest components prepared, exhibiting interesting excitation/ concentration/ time‐dependent Finally, potential application multi‐level information encryption demonstrated. This study not only proposes effective method regulating color, but also highlights CP‐type preparing materials.

Язык: Английский

Achieving Efficient Dark Blue Room‐Temperature Phosphorescence with Ultra‐Wide Range Tunable‐Lifetime DOI
Lei Zhou,

Jinming Song,

Zhenyi He

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(22)

Опубликована: Март 26, 2024

Abstract Tunable‐lifetime room‐temperature phosphorescence (RTP) materials have been widely studied due to their broad applications. However, only few reports achieved wide‐range lifetime modulation. In this work, ultra‐wide range tunable‐lifetime efficient dark blue RTP were realized by doping methyl benzoate derivatives into polyvinyl alcohol (PVA) matrix. The lifetimes of the doped films can be increased from 32.8 ms 1925.8 ms. Such wide modulation is extremely rare in current reports. Moreover, emission 4‐hydroxybenzoate‐doped film located region and quantum yield reaches as high 15.4 %, which broadens applications organic optoelectronic information. Further studies demonstrated that reason for tunable was magnitude electron‐donating ability substituent group modulates HOMO–LUMO singlet‐triplet energy gap derivatives, well non‐covalent interactions with PVA. potential luminescent displays optical anti‐counterfeiting these high‐performance conducted.

Язык: Английский

Процитировано

43
Room temperature phosphorescence materials based on small organic molecules: Design strategies and applications DOI Creative Commons
Meixia He, C. G. Ding, Hexiang Guo

и другие.

Deleted Journal, Год журнала: 2024, Номер 2(3)

Опубликована: Июль 23, 2024

Abstract Room‐temperature phosphorescence (RTP) materials have attracted significant attention due to their applications in various fields such as information storage and encryption, organic light‐emitting diode (OLED), sensing, lighting display, biological imaging, photodynamic therapy. Traditionally, RTP can be efficiently developed using inorganic systems with noble metals or rare earth elements. Recently, many efforts been devoted the development of based on small molecules. The strategies construct include hydrogen bonding, heavy atom effect, n –π* transitions, π–π stacking, donor–acceptor host–guest doping. Herein, we summarize recent examples molecules primarily focusing design properties. Moreover, promising OLED, well bio‐imaging phototherapy are discussed. challenges perspectives given provide inspiration toward future materials.

Язык: Английский

Процитировано

15
Construction of Weakly Hybridized Excited State Using Donor‐π‐Acceptor Structure and Applications: From Highly Efficient Pure‐Blue Electro‐Fluorescence to Visible‐Light Polymerization DOI

Ruiya Wu,

Ke Sun, Gaopeng Shi

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Апрель 13, 2024

Abstract Herein this work, a novel donor‐π‐acceptor (D‐π‐A) pure‐blue hybrid local and charge‐transfer (HLCT) fluorescent material TDFBO its functionalization as organic light emitting diode (OLED) emitter photoinitiator (PI) in photopolymerization is reported. The weak‐hybridization property involved by the fluorene π‐bridge can simultaneously give satisfied photo‐luminescent quantum yield (PLQY) make efficient “hot‐exciton” channel achievable. Moreover, D‐π‐A structure also promote an exceeding electron mobility high 3.57×10 −4 cm 2 V −1 s . Finally, it noted that TDFBO‐doped OLED be regarded best one among emissive OLEDs, which exhibits maximum external efficiency of 11.1%, while rolling‐off only stands on low level, 6% at 100 cd m −2 Additionally, relatively final conversion C = double bond representative acrylate monomer attained photoinitiation under 405 nm LED, where has been applied to 3D printing.

Язык: Английский

Процитировано

11
Anti‐Smudge Organic Afterglow Panels DOI

Xiangxiang Zhai,

Zhe Mo, Qianqian Yan

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Апрель 17, 2024

Abstract Organic afterglow panels show promising applications in display and information anti‐counterfeiting. Like other panels, organic are susceptible to contamination when used, which can affect their aesthetics clarity. Here, a kind of visible‐light‐excitable anti‐smudge based on dopant‐matrix strategy easily prepared through the UV light‐curing method is reported. The phosphorescence lifetime panel up 9.45 s with an duration longer than 100 s. Moreover, transparent low dynamic friction (0.129), large water contact angle (108°) oleic acid (77°), high performance anti‐smudge, oil repellency, removability fingerprints, avoiding influence ink or sewage its This study will expand pathways for practical materials.

Язык: Английский

Процитировано

8
Achieving pure room temperature phosphorescence (RTP) in phenoselenazine-based organic emitters through synergism among heavy atom effect, enhanced n → π* transitions and magnified electron coupling by the A–D–A molecular configuration DOI Creative Commons

Daokun Zhong,

Siqi Liu, Ling Yue

и другие.

Chemical Science, Год журнала: 2024, Номер 15(24), С. 9112 - 9119

Опубликована: Янв. 1, 2024

Synergism among heavy atom effect, enhanced n → π* transitions and magnified electron coupling to promote pure RTP emission.

Язык: Английский

Процитировано

8
Tuning triplet excitons and dynamic afterglow based on host-guest doping DOI

Yuchen Hong,

Yupeng Zhao, Lei Ma

и другие.

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Год журнала: 2024, Номер 324, С. 124955 - 124955

Опубликована: Авг. 23, 2024

Язык: Английский

Процитировано

8
Dibenzyl Isophthalates as Versatile Hosts in Room Temperature Phosphorescence Host-Guest Systems DOI Creative Commons

Martin Molkenthin,

Emanuel Hupf, Boris J. Nachtsheim

и другие.

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Simple yet powerful: dibenzyl isophthalates are easy to modify hosts for room-temperature phosphorescence. These systems achieve record-setting quantum yields and lifetimes while offering unprecedented color tunability across the visible spectrum.

Язык: Английский

Процитировано

1
Twist and Shine: Ultra‐Narrow Red Emission from Nitrogen and Oxygen Co‐Doped Hetero‐Nanographenes DOI Open Access
Wei Jiang, Hongxiang Zhang,

Xinqiang Hua

и другие.

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Nanographenes, known for their exceptional optoelectronic properties, have garnered significant interest tunable electronic structures, particularly through heteroatom doping. Herein, we report the synthesis of two twisted hetero-nanographenes (h-NGs) co-doped with nitrogen and oxygen via a three-step strategy, where tandem Pictet-Spengler cyclization ipso-aromatic substitution serve as key step. Both h-NGs incorporate unique bis-fused diazacoronene (BFDAC) core, one further extending π-system peri-fusion four benzopyran units. Single-crystal analyses reveal that BFDAC core both adopts highly geometry, whereas benzopyran-fused has enhanced rigidity. Theoretical studies confirm global aromaticity 30 π-electrons delocalized along periphery. Notably, co-doping enables precise tuning, pyridinic lowering LUMO level raising HOMO level. display red photoluminescence (PL), derivative exhibits an ultra-narrow emission full-width at half-maximum 19 nm, among narrowest reported organic red-emitting materials. exhibit acid-responsive optical behavior including near-infrared absorption shift PL quenching, providing additional functional versatility.

Язык: Английский

Процитировано

1
Visible-light-excited room-temperature phosphorescent carbon dots: preparation strategies, mechanisms, and applications DOI

Zengsheng Guo,

Xiaodong Yang,

Bo Xu

и другие.

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(24), С. 8668 - 8679

Опубликована: Янв. 1, 2024

This review article provides a comprehensive overview of the latest developments in visible-light-excited RTP CDs, which includes luminescence mechanisms, preparation strategies, property regulation, and potential applications.

Язык: Английский

Процитировано

6
Photo- and Oxygen- Synergistically Controlled Selective Expression of Organic Phosphorescence Units DOI

Huiwen Jin,

Lin Han, Lijuan Bu

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(12), С. 15133 - 15142

Опубликована: Март 15, 2024

Dynamic control of ultralong organic room-temperature phosphorescence (UORTP) is a charming target. Herein, we report stimuli-responsive unit 7H-indolo[2,3-c]quinoline (NBCz) and its derivatives (PCBNBCz, FSO2NBCz, N2BCzSO2NBCz) that show photo- oxygen- synergistically induced afterglow activation color change in the PMMA film. PCBNBCz FSO2NBCz feature donor–acceptor (D–A) structure, N2BCzSO2NBCz features acceptor-bridged two different units (NBCz N2BCz). The photoactivated UORTP arises from photoinduced consumption oxygen It clear NBCz contributes to subsequent because NBCz-doped film shows same process. ESR HRMS measurements confirmed oxidation occurs at nitrogen atom quinoline ring via photogenerated superoxide radicals, which results change. TDDFT calculations proved after NBCz, T1 energy level declines significantly. Furthermore, photocontrolled selective expression achieved case N2BCzSO2NBCz. After further UV irradiation, happened, oxidized form N2BCzSO2NBCz-O emitted intrinsic orange NBCz-O selectively screened yellowish-green N2BCz. Finally, multilevel photolithography can be demonstrated based on This work may give deep insight into pave simple way for development stimulus-responsive smart materials.

Язык: Английский

Процитировано

5