Science China Materials, Год журнала: 2024, Номер 68(3), С. 879 - 887
Опубликована: Дек. 18, 2024
Язык: Английский
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Окт. 3, 2024
Abstract Stimuli‐responsive circularly polarized luminescent (CPL) materials are expected to find widespread application in advanced information technologies, such as 3D displays, multilevel encryption, and chiral optical devices. Here, using R‐/S‐α‐phenylethylamine 3,4,9,10‐perylenetetracarboxylic dianhydride precursors, carbon dots (Ch‐CDs) exhibiting bright concentration‐dependent luminescence synthesized, demonstrating reversible responses both their morphologies emission spectra. By adjusting Ch‐CD concentration, the switchable wavelength is extended over 180 nm (539–720 nm), with maximum quantum efficiency reaching 100%. Meanwhile, upon increasing red‐shifts, while chirality of assembled nanoribbons synchronously amplified, ultimately achieving CPL at 709 a asymmetry factor 2.18 × 10 −2 . These values represent longest largest g lum reported for CDs. Considering remarkable properties synthesized Ch‐CDs, logic gates designed, potential practical applications demonstrated anti‐counterfeiting flexible electronic printing, solid‐state CPL. Furthermore, deep‐red electroluminescence light‐emitting diodes (EL‐LEDs) prepared these an external 1.98%, which highest value date CDs EL‐LEDs, first report devices based on
Язык: Английский
Процитировано
18
Dyes and Pigments, Год журнала: 2025, Номер unknown, С. 112771 - 112771
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
2
Advanced Optical Materials, Год журнала: 2024, Номер 12(24)
Опубликована: Июль 2, 2024
Abstract Chiral self‐discrimination plays a critical role in supramolecular chemistry and materials science. However, an ideal strategy for achieving chiral remains elusive due to the inevitable nonspecific binding of incorrect enantiomers, insufficient intrinsic optical activity molecules. Herein, novel 1,1′‐binaphthol (BINOL) derivative with imide group fused at peri ‐position one naphthol scaffold is developed, which combines dual functionalities aggregation‐induced emission characteristic BINOLs, high 1,8‐naphthalimides. The multiple molecular recognition between two hydroxyl groups BINOL units carbonyl 1,8‐naphthalimide moieties endows precise behaviors. As expected, homochiral aggregates exhibit reversible phase transitions, switching from non‐emission bright green upon absorption desorption methanol vapor. In contrast, heterochiral conglomerates irreversible yellow changes impact self‐discrimination. Such self‐discrimination‐induced luminescence vapochromism can be further applied high‐level anti‐counterfeiting data encryption. This work provides new perspective on smart organic based
Язык: Английский
Процитировано
3
Precision Chemistry, Год журнала: 2025, Номер 3(5), С. 289 - 294
Опубликована: Март 13, 2025
Twisted nanographenes (NGs) are currently attracting a lot of attention owing to their geometrical and electronic structures that differ substantively from conventional planar nonplanar NGs, while the strategic synthesis twisted NGs is still topic interest because products often interconvertible among unidirectionally, alternatively, or randomly geometries otherwise obtained as mixture them. Herein, we report conformationally specific where geometry was reinforced by introducing 1,4-dioxane rings at K-region central pyrene core bears large contortion. The were generated semi-deprotection, tetraoxa[4.4.4]propellanes in precursor molecules, which confirmed be engaged forming C–C bonds via Friedel–Crafts type mechanism. contortion within causes narrowed HOMO–LUMO gap on account unusual pz-lobe overlap between +z −z sides, giving rise red emission with high quantum yield 94% well stable redox processes 2e– uptake/release.
Язык: Английский
Процитировано
0
Chemical Society Reviews, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Chiral nanographenes: molecular architecture, key constituents, and their circularly polarized luminescence.
Язык: Английский
Процитировано
0
Supramolecular chemistry, Год журнала: 2025, Номер unknown, С. 1 - 7
Опубликована: Май 8, 2025
Язык: Английский
Процитировано
0
Asian Journal of Organic Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Май 26, 2025
Abstract A chirally twisted tetrakisporphyrin macrocycle was synthesized by incorporating a chiral dioxolane linker as unit into macrocycle. Circular dichroism measurements and computational analyses confirmed that the solvents influence handedness of The is prone to adopt conformations allow efficient solvation depending on both polarity structure solvent molecules. Specifically, nonpolar aromatic promote ( M )‐twisted conformer R , )‐tetrakisporphyrin macrocycle, whereas polar halogenated stabilize P conformer. In high‐polar solvents, structures molecules most likely determine preference )‐ conformers.
Язык: Английский
Процитировано
0
Aggregate, Год журнала: 2025, Номер unknown
Опубликована: Май 9, 2025
ABSTRACT Chirality is a fundamental property in molecules and biological systems, characterized by asymmetric configurational features. Circularly polarized luminescence (CPL) materials have gained significant attention due to their unique optical activities, with applications 3D displays, chiral sensors, catalysis, more. Chiral transfer amplification typically involve the generation of chirality excited state, facilitated interactions like energy transfer, electron or induction. Supramolecular self‐assembly strategies, particularly macrocyclic compounds, enable linking achiral luminescent units through intermolecular interactions. Macrocyclic hosts—cyclodextrins, calix[ n ]arenes, pillar[ cyclophanes, cucurbit[ ]urils—are especially promising stable structures adjustable cavities for guest encapsulation. These compounds induce photophysical properties host–guest complexation, making them ideal constructing amplification, CPL‐active materials. This review summarizes advancements multicolor CPL materials, sensing, induction, separation, highlighting potential supramolecular material design. The challenges future directions this field are also discussed, aiming guide further research application systems.
Язык: Английский
Процитировано
0
Macromolecules, Год журнала: 2025, Номер unknown
Опубликована: Июнь 3, 2025
Язык: Английский
Процитировано
0
Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown
Опубликована: Авг. 2, 2024
Perylene diimide (PDI) dimers and higher aggregates are key components in organic molecular photonics photovoltaic devices, supporting singlet fission symmetry breaking charge separation. Detailed understanding of their excited states is thus important. This has proven challenging because interchromophoric coupling a strong function dimer architecture. Recently, macrocyclic PDI was reported which excitonic could be turned on off simply by changing the solvent. presents useful case where modified without synthetic changes to tune supramolecular structure. Here we present detailed study solvent dependent state dynamics this means coherent multidimensional spectroscopy. Spectral analysis resolves different strengths, consistent with conformation. The strongly coupled conformer forms an excimer within 300 fs. low-frequency Raman active modes recovered from two-dimensional electronic spectra reveal frequencies characteristic exciton coupling. These assigned modulating corresponding DFT calculations. Further reveals time frequency during formation. Analysis "beatmaps" features not predicted displaced harmonic oscillator model vibronic
Язык: Английский
Процитировано
2