Boost the Circularly Polarized Phosphorescence of Chiral Organometallic Platinum Complexes by Hierarchical Assembly into Fibrillar Networks DOI
Zhong‐Liang Gong,

Ti‐Xiong Dan,

Jian‐Cheng Chen

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(25)

Опубликована: Апрель 10, 2024

Abstract Circularly polarized luminescence (CPL)‐active molecular materials have drawn increasing attention due to their promising applications for next‐generation display and optoelectronic technologies. Currently, it is challenging obtain CPL with both large dissymmetry factor ( g lum ) high quantum yield Φ ). A pair of enantiomeric N C‐type Pt(II) complexes L/D )‐ 1 modified chiral Leucine methyl ester are presented herein. Though the solutions these CPL‐inactive, spin‐coated thin films exhibit giantly‐amplified circularly phosphorescences | 0.53 at 560 nm air ~50 %, as well appealing circular dichroism (CD) signals maximum absorption abs 0.37–0.43 480 nm. This superior performance benefits from hierarchical formation crystalline fibrillar networks upon spin coating. Comparative studies another 2 a symmetric C coordination mode suggest that asymmetric favorable efficient exciton delocalization amplify performance. Optical in CPL‐contrast imaging inducing CP light generation achiral emitters common light‐emitting diode lamps been successfully realized.

Язык: Английский

Biobased and biodegradable films exhibiting circularly polarized room temperature phosphorescence DOI Creative Commons
Mengnan Cao,

Yiran Ren,

Yue Wu

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 15, 2024

Abstract There is interest in developing sustainable materials displaying circularly polarized room-temperature phosphorescence, which have been scarcely reported. Here, we introduce biobased thin films exhibiting luminescence with simultaneous phosphorescence. For this purpose, phosphorescence-active lignosulfonate biomolecules are co-assembled cellulose nanocrystals a chiral construct. The shown to capture the chirality generated by within films, emitting phosphorescence 0.21 dissymmetry factor and 103 ms lifetime. By contrast most organic materials, chiral-phosphorescent system possesses stability, no significant recession under extreme chemical environments. Meanwhile, luminescent resist water humid environments but fully biodegradable (16 days) soil conditions. introduced bio-based, environmentally-friendly expected open many opportunities, as demonstrated here for information processing anti-counterfeiting.

Язык: Английский

Процитировано

38
Mechanically Tunable Circularly Polarized Luminescence of Liquid Crystal‐Templated Chiral Perovskite Quantum Dots DOI
Xuan Zhang, Lin Li, Yuanhao Chen

и другие.

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

Опубликована: Март 25, 2024

Abstract Endowing perovskite quantum dots (PQDs) with circularly polarized luminescence (CPL) offers great promise for innovative chiroptical applications, but the existing strategies are inefficient in acquiring stimuli‐responsive flexible chiral films large, tunable dissymmetry factor ( g lum ) and long‐term stability. Here, we report a strategy design synthesis of luminescent cholesteric liquid crystal elastomer (Lumin‐CLCE) mechanically CPL, which is enabled by crystal‐templated self‐assembly situ covalent cross‐linking judiciously designed photopolymerizable CsPbX 3 (X=Cl, Br, I) PQD nanomonomers into elastic polymer networks. The resulting Lumin‐CLCE showcase structural color natural light noticeable CPL maximum value up to 1.5 under UV light. manipulation intensity rotation direction achieved controlling self‐assembled helicoidal nanostructure handedness soft helices. A significant breakthrough lies achievement reversible, perovskite‐based switch activated biaxial stretching, enables flexible, dynamic anti‐counterfeiting labels capable decrypting preset information specific polarization states. This work can provide new insights development advanced materials their emerging applications encryption, 3D displays, beyond.

Язык: Английский

Процитировано

33
Helical-caging enables single-emitted large asymmetric full-color circularly polarized luminescence DOI Creative Commons
Yajie Zhou, Yaxin Wang, Yong‐Hui Song

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Янв. 4, 2024

Abstract Colorful circularly polarized luminescence materials are desired for 3D displays, information security and asymmetric synthesis, in which single-emitted ideal owing to self-absorption avoidance, evenly entire-visible-spectrum-covered photon emission facile device fabrication. However, restricted by the synthesis of chiral broad-luminescent emitters, realization application high-performing full-color is its infancy. Here, we disclose a system (spiral generator), composed whole-vis-spectrum emissive quantum dots liquid crystals. The achieves maximum dissymmetry factor 0.8 remains an order 10 −1 visible region tuning photonic bandgap. We then expand it series customized-color luminescence, build devices further demonstrate working scenario photoinduced enantioselective polymerization. This work contributes design efficient chiroptical materials, fabrication synthesis.

Язык: Английский

Процитировано

30
Dynamically Modulating the Dissymmetry Factor of Circularly Polarized Organic Ultralong Room‐Temperature Phosphorescence from Soft Helical Superstructures DOI
Jiao Liu,

Junjie Wu,

Juan Wei

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(12)

Опубликована: Янв. 24, 2024

Abstract Achieving circularly polarized organic ultralong room‐temperature phosphorescence (CP‐OURTP) with a high luminescent dissymmetry factor (g lum ) is crucial for diverse optoelectronic applications. In particular, dynamically controlling the of CP‐OURTP can profoundly advance these applications, but it still unprecedented. This study introduces an effective strategy to achieve photoirradiation‐driven chirality regulation in bilayered structure film, which consists layer soft helical superstructure incorporated light‐driven molecular motor and phosphorescent (RTP) polymer. The prepared film exhibits emission lifetime 805 ms g value up 1.38. Remarkably, resulting be reversibly controlled between 0.6 1.38 over 20 cycles by light irradiation, representing first example CP‐OURTP.

Язык: Английский

Процитировано

29
Light‐Driven Sign Inversion of Circularly Polarized Luminescence Enabled by Dichroism Modulation in Cholesteric Liquid Crystals DOI
Yang Li, Yihan Chen, Jiaxin Luo

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 12, 2024

Stimuli-responsive circularly polarized luminescence (CPL) materials show great promise in applying information encryption and anticounterfeiting. Herein, light-driven CPL sign inversion is achieved by combining a photoresponsive achiral negative dichroic dye (KG) static positive (NR) as dopants at the 0.5:0.5 weight ratio into cholesteric liquid crystal (CLC) host. The side chains of KG undergo trans/cis isomerization after 365 nm UV light irradiation, leading to dichroism (S

Язык: Английский

Процитировано

23
Chiral Liquid Crystalline Metal–Organic Framework Thin Films for Highly Circularly Polarized Luminescence DOI
Xuexian Yang, Na Li, Chong Li

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(23), С. 16213 - 16221

Опубликована: Май 30, 2024

Combining metal–organic frameworks (MOFs) with liquid crystals to construct crystalline MOFs (LCMOF) offers the advantage of endowing and enhancing their functionality, yet it remains a challenging task. Herein, we report chiral MOF (CLCMOF) thin films by cross-linking (CLC) realize highly circular polarization luminescence (CPL) performance photo thermal switching. By layer stilbene-containing CLC stilbene-based (CLC/MOF) film, CLCMOF were successfully obtained after UV irradiation due abundant [2 + 2] photocycloaddition. The resulted have strong chirality, obvious photochromic fluorescent, CPL (the asymmetry factor reaches 0.4). Furthermore, fluorescent thermotropic CLC, can be reversed red-shifted heating treatment, showing photo- Such MOF-based photo/thermal switching prepared patterns codes for demonstration potential application in advanced information anticounterfeit encryption. This study not only opens strategy developing combining but also new route achieve optical applications.

Язык: Английский

Процитировано

23
Nano-achiral complex composites for extreme polarization optics DOI
Jun Lu, Wenbing Wu, Felippe M. Colombari

и другие.

Nature, Год журнала: 2024, Номер 630(8018), С. 860 - 865

Опубликована: Май 29, 2024

Язык: Английский

Процитировано

16
A Halogen‐Bonded Fluorescent Molecular Photoswitch: Transition from 3D Cubic Lattice to 1D Helical Superstructure for Polarization Inversion of Circularly Polarized Luminescence DOI
Shan Li, Jing Jing Wang, Meng Tian

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(36)

Опубликована: Июнь 10, 2024

The fabrication of materials that can switch between circularly polarized luminescence (CPL) signals is both essential and challenging. Here, two new halogen-bonded fluorescent molecular photoswitches, namely, HB-switch 1 2, containing α-cyano-substituted diarylethene compounds with different end groups were developed. Upon exposure to specific UV or visible light wavelengths, they exhibited controllable reversible Z/E photoisomerization. When these switches integrated into blue-phase liquid crystals (BPLCs), the temperature range BP significantly expanded. Notably, system incorporating exclusively achieved polarization inversion CPL under irradiation UV/Visible during cooling/heating. photo/thermal dual-response behavior be attributed phase transition from a high-symmetry 3D Icubic lattice low-symmetry 1D helical superstructure induced by photoisomerization changes. This study underscores significance employing halogen-bond assembly strategies design switchable signals, opening possibilities for CPL-active systems.

Язык: Английский

Процитировано

16
Integrating Aggregation Induced Emission and Twisted Intramolecular Charge Transfer via Molecular Engineering DOI Open Access
Wei Zhang, Jie Kong, Rong Miao

и другие.

Advanced Functional Materials, Год журнала: 2023, Номер 34(7)

Опубликована: Ноя. 5, 2023

Abstract The pursuit of sensitive fluorescent chromophores with integrated aggregation‐induced emission (AIE) and twisted intramolecular charge transfer (TICT) properties are attractive due to the tunable increased intensity. However, this type chromophore has yet be exemplified mechanistically. In study, a strategy is presented for manipulating formation TICT AIE effect through molecular engineering. feasibility validated by theoretical calculations ultrafast spectroscopies. By precisely adjusting hydrophobicity donor group, fluorescence significantly enhanced addition poor solvent. These findings not only provide mechanistic elucidation exhibiting in various environmental conditions but also underscore critical factors systematic design high tunability strong emissions.

Язык: Английский

Процитировано

29
Tunable circular polarization room temperature phosphorescence with ultrahigh dissymmetric factor by cholesteric liquid crystal elastomers DOI Creative Commons

Qingyan Fan,

Ziyuan Li,

Kangde Jiang

и другие.

Cell Reports Physical Science, Год журнала: 2023, Номер 4(10), С. 101583 - 101583

Опубликована: Сен. 15, 2023

It is highly demanded that organic functional materials can generate strong and switchable circularly polarized room temperature phosphorescence (CPRTP) be developed. Here, we report a simple effective strategy to achieve mechanical-tunable CPRTP with high luminescence dissymmetric factors (glum) by doping bulky phosphorescent guest, tetra-N-phenylbenzidine (TPB), into reconfigurable cholesteric liquid crystal elastomers (CLCEs). The amount of chain extender plays vital role in determining the lifetime mechanical properties constructed CLCE composite films. Both experimental theoretical results reveal TPB compensates for insufficient rigidity CLCEs, resulting long-afterglow CPRTP. Moreover, glum tuned from 0.93 near zero stretching CLCEs. Combining CLCEs' network remarkable CPRTP, 4D encryption luminescent barcode established, exhibiting great potential information storage these distinct materials.

Язык: Английский

Процитировано

24