Macroscopic Assembly of Chiral Hydrogen‐bonded Metal‐free Supramolecular Glasses for Enhanced Color‐tunable Ultralong Room Temperature Phosphorescence

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(28)

Опубликована: Май 12, 2023

Glassy materials, with desirable mechanical rigidity, shaping ability, high transparency, are attracting great interest in diverse fields. However, optically bulk molecule-based glasses still rare, mainly due to limited monomeric species and harsh preparation conditions. Herein, we report a facile bottom-up solution fabrication process obtain metal-free supramolecular (SMGs) at the macroscopic scale using L-Histidine hexamethylenetetramine as building blocks. The chiral SMGs possess color-tunable ultralong room temperature phosphorescence (decay lifetime up 141.2 ms) circular polarized luminescence (g factor 8.7×10-3 ). strong hydrogen bonds effectively drive formation of SMGs, provide rigid microenvironment boost triplet exciton generation. By virtue excitation- temperature-dependent applications including multicolored displays, visual UV detection, persistently luminescent thermometer demonstrated.

Язык: Английский

---

Ultralow‐loss Optical Waveguides through Balancing Deep‐Blue TADF and Orange Room Temperature Phosphorescence in Hybrid Antimony Halide Microstructures

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(39)

Опубликована: Авг. 14, 2023

Harnessing the potential of thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) is crucial for developing light-emitting diodes (LEDs), lasers, sensors, many others. However, effective strategies in this domain are still relatively scarce. This study presents a new approach to achieving highly efficient deep-blue TADF (with PLQY 25 %) low-energy orange RTP 90 through fabrication lead-free hybrid halides. class monomeric dimeric 0D antimony halides can be facilely synthesized using bottom-up solution process, requiring only few seconds minutes, which offer exceptional stability nontoxicity. By leveraging adaptable molecular arrangement crystal packing modes, demonstrate ability self-assemble into regular 1D microrod 2D microplate morphologies. self-assembly facilitated by multiple non-covalent interactions between inorganic cores organic shells. Notably, these microstructures exhibit outstanding polarized luminescence function as low-dimensional optical waveguides with remarkably low optical-loss coefficients. Therefore, work not pioneering demonstration halides, but also introduces micro/nanostructures that hold promising applications white LEDs photonic systems.

Язык: Английский

---

Room-temperature phosphorescent materials derived from natural resources

Nature Reviews Chemistry, Год журнала: 2023, Номер 7(11), С. 800 - 812

Опубликована: Сен. 25, 2023

Язык: Английский

---

Light‐Induced Electron Transfer Toward On/Off Room Temperature Phosphorescence in Two Photochromic Coordination Polymers

Advanced Functional Materials, Год журнала: 2023, Номер 33(47)

Опубликована: Авг. 4, 2023

Abstract Photoswitchable room temperature phosphorescence (RTP) materials are of great interest due to their potential applications in optical devices and switches. Herein, two Zn‐based coordination polymers (CPs) (H 3 ‐TPB)·[Zn 6 (H‐HEDP)(HEDP) 2 O) ]·5H O (complex 1; HEDP = hydroxyethylidene diphosphonate; TPB 1,3,5‐tris(4‐pyridyl)benzene) (H‐TPB)·[Zn (H‐HEDP)(HEDP)(H O)]·2H 2) with distinguishable photochromism tunable RTP synthesized involving photoactive molecules different packing modes. Complex 1 exhibits bidirectionally on/off regulation via on‐switch excitation 250−330 nm light off‐switch 350−380 nm, the “turn‐on” behavior can be attributed advance Förster resonance energy transfer‐assisted intersystem crossing (ISC) process while “turn‐off” transformation from H ‐TPB cations · radicals. photoswitchable accompanied reversible by leveraging self‐absorption emission. Two demos based on above compounds further applied demonstrate application information recording encryption fields. This work supplies a strategy toward design switchable systems using electron transfer photochromism, shedding broadening frontiers photoresponsive materials.

Язык: Английский

---

Intriguing Room Temperature Phosphorescence in Crystalline Porous Organic Frameworks

Advanced Functional Materials, Год журнала: 2023, Номер 33(52)

Опубликована: Сен. 13, 2023

Abstract Organic room temperature phosphorescence (RTP) materials have become a hot topic in the field of luminescence wherein crystalline porous organic frameworks (metal–organic (MOFs), hydrogen‐bonded (HOFs), covalent (COFs))‐based RTP are receiving considerable attention. Beyond all doubt, frameworks‐based perfectly integrate advantages and materials. This review provides timely brief outline for development including construction strategy MOFs/HOFs/COFs‐based their performance as well potential applications. Moreover, conclusion outlook also discussed to present challenges prospects further high‐performance

Язык: Английский

---

Unusual Thermal Quenching of Photoluminescence from an Organic–Inorganic Hybrid [MnBr₄]²⁻‐based Halide Mediated by Crystalline–Crystalline Phase Transition

Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(2)

Опубликована: Окт. 10, 2023

The ability to generate and manipulate photoluminescence (PL) behavior has been of primary importance for applications in information security. Excavating novel optical effects create more possibilities encoding become a continuous challenge. Herein, we present an unprecedented PL temporary quenching that highly couples with thermodynamic phase transition hybrid crystal (DMML)

Язык: Английский

---

Stable and ultralong room-temperature phosphorescent copolymers with excellent adhesion, resistance, and toughness

Science Advances, Год журнала: 2024, Номер 10(10)

Опубликована: Март 8, 2024

Developing stable room-temperature phosphorescence (RTP) emission without being affected by moisture and mechanical force remains a great challenge for purely organic systems, due to their triplet states sensitive the infinitesimal motion of phosphors oxygen quencher. We report kind highly robust phosphorescent doping rigid phosphor into copolymer (polyvinyl butyral resin) matrix with balance mutually exclusive features, including rigidly hydrophilic hydrogen bond network elastically hydrophobic constituent. Impressively, these RTP polymeric films have superior adhesive ability on various surfaces showed reversible photoactivated lifetimes up 5.82 seconds, which can be used as in situ modulated anticounterfeit labels. They maintain bright afterglow over 25.0 seconds under practical conditions, such storage refrigerators, soaking natural water month, or even subjected strong collisions impacts. These findings provide deep insights developing ultralong materials desirable comprehensive performance.

Язык: Английский

---

Enabling robust blue circularly polarized organic afterglow through self-confining isolated chiral chromophore

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

Опубликована: Апрель 9, 2024

Abstract Creating circularly polarized organic afterglow system with elevated triplet energy levels, suppressed non-radiative transitions, and effective chirality, which are three critical prerequisites for achieving blue afterglow, has posed a formidable challenge. Herein, straightforward approach is unveiled to attain materials by covalently self-confining isolated chiral chromophore within polymer matrix. The formation of robust hydrogen bonds the matrix confers distinctly stabilized molecular state chromophores, endowing emission band at 414 nm, lifetime 3.0 s, luminescent dissymmetry factor ~ 10 −2 . Utilizing synergistic chirality transfer, full-color systems endowed doping colorful fluorescent molecules into designed polymers, empowering versatile applications. This work paves way streamlined design materials, expanding horizons various domains.

Язык: Английский

---

Encapsulation engineering of porous crystalline frameworks for delayed luminescence and circularly polarized luminescence

Chemical Society Reviews, Год журнала: 2024, Номер 53(13), С. 6694 - 6734

Опубликована: Янв. 1, 2024

Delayed luminescence (DF), including phosphorescence and thermally activated delayed fluorescence (TADF), circularly polarized (CPL) exhibit common broad application prospects in optoelectronic displays, biological imaging, encryption. Thus, the combination of is attracting increasing attention. The encapsulation guest emitters various host matrices to form host-guest systems has been demonstrated be an appealing strategy further enhance and/or modulate their luminescence. Compared with conventional liquid crystals, polymers, supramolecular matrices, porous crystalline frameworks (PCFs) metal-organic (MOFs), covalent-organic (COFs), zeolites hydrogen-bonded organic (HOFs) can not only overcome shortcomings such as flexibility disorder but also achieve ordered guests long-term stability chiral structures, providing new promising platforms for development DF CPL. In this review, we provide a comprehensive critical summary recent progress photochemistry

Язык: Английский

---

Supramolecular assembly activated single-molecule phosphorescence resonance energy transfer for near-infrared targeted cell imaging

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

Опубликована: Июнь 5, 2024

Abstract Pure organic phosphorescence resonance energy transfer is a research hotspot. Herein, single-molecule system with large Stokes shift of 367 nm and near-infrared emission constructed by guest molecule alkyl-bridged methoxy-tetraphenylethylene-phenylpyridines derivative, cucurbit[n]uril ( n = 7, 8) β -cyclodextrin modified hyaluronic acid. The high binding affinity cucurbituril to molecules in various stoichiometric ratios not only regulates the topological morphology supramolecular assembly but also induces different emissions. Varying from spherical nanoparticles nanorods for binary assemblies, three-dimensional nanoplate obtained ternary co-assembly cucurbit[7]uril/cucurbit[8]uril, accompanying enhanced at 540 nm. Uncommonly, secondary acid activates single intramolecular process derived phenyl pyridines unit methoxy-tetraphenylethylene function group, enabling delayed fluorescence 700 nm, which ultimately applied mitochondrial targeted imaging cancer cells.

Язык: Английский

---