Science China Materials, Journal Year: 2024, Volume and Issue: 68(3), P. 879 - 887
Published: Dec. 18, 2024
Language: Английский
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 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
Language: Английский
Citations
12
Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112771 - 112771
Published: March 1, 2025
Language: Английский
Citations
1
Precision Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: March 13, 2025
Language: Английский
Citations
0
Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Chiral nanographenes: molecular architecture, key constituents, and their circularly polarized luminescence.
Language: Английский
Citations
0
Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(24)
Published: July 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
Language: Английский
Citations
3
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 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
Language: Английский
Citations
2
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(39)
Published: Aug. 2, 2024
Abstract 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
Language: Английский
Citations
1
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(43), P. 58931 - 58939
Published: Oct. 18, 2024
Photochromic hydrogen-bonded organic frameworks (HOFs) can introduce different luminescent functional groups to achieve synergistic controlled multiple color change properties, which are in great demand for diverse information encryption applications. We report this paper switchable photochromic and photoluminescent dual group HOFs constructed with effects by N,N′-bis(2-phenylalanine)-1,4,5,8-naphthalenediimine (H2PheNDI) benzenecarboximidamide 4,4′-azobis(hydrochloride) (AZBH). The crystal powder of iHOF-41 is orange–red color, be changed black under the irradiation a 365 nm ultraviolet (UV) light source 15 min. photoisomerization rate solution continuous UV 5 h was close 99%. composite membranes properties photochromism photoluminescence when they discolored and, at same time, excite red bright fluorescence. This work achieves construction based on switching biluminescent explores mechanism process as well its practical application encryption.
Language: Английский
Citations
1
Organic Letters, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 30, 2024
Herein, we report the synthesis of a novel carbaporphyrin incorporating perylene diimide (PDI) and dipyrromethane units. The twisted plane PDI subunits imbues with intriguing conformational chirality stable chiroptical properties. Both experimental theoretical studies reveal that unique properties arise from rigidly conjugated macrocyclic architecture reduced interchromophoric distance. This work successfully integrates PDIs into carbaporphyrins, thereby expanding their structural diversity functional potential.
Language: Английский
Citations
0
Chemical Communications, Journal Year: 2024, Volume and Issue: 60(94), P. 13875 - 13878
Published: Jan. 1, 2024
A dicationic double-twisted nanographene exhibited an intense NIR-II absorption band tailing to 1500 nm as well a high dissymmetry factor of −2.09% at 1443 nm.
Language: Английский
Citations
0