Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 418, P. 136285 - 136285
Published: Nov. 1, 2024
Language: Английский
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(30), P. 16748 - 16759
Published: July 20, 2023
Understanding the changes of molecular conformations is crucial for realizing multiple emissive triplet states in room-temperature phosphorescence (RTP) materials. In this work, we report two molecules, 4,4'-dimethylbenzil (DMBZ) and 4,4'-di-tert-butylbenzil (DBBZ) with conformation-dependent luminescence, demonstrate that stimulus-responsive wide-tuning RTP emissions can be realized via synergetic conformational regulations ground excited states. Due to changes, DMBZ DBBZ show abundant variations upon external stimuli, including light, force, heat, fumigation. Notably, exhibits both states, which endow unique behaviors. presents phase transitions between supercooled liquid state different solid accompanied by transitions, excited-state are effectively regulated. Moreover, wide-range (between cyan, green, yellow) single component host-guest systems DBBZ, showing potential applications temperature sensing, multicolor dynamic displays, information encryption. These results may provide new visions understanding complicated aggregated state, as well insights into relationship conformations, emissions, stimulus responsiveness.
Language: Английский
Citations
71
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)
Published: Feb. 28, 2024
Abstract Thermally activated delayed fluorescence (TADF) emitters featuring through‐space charge transfer (TSCT) can be excellent candidates for piezochromic luminescent (PCL) materials due to their structural dynamics. Spatial donor‐acceptor (D−A) stacking arrangements enable the modulation of inter‐ and intramolecular D−A interactions, as well spatial states, under varying pressure conditions. Herein, we demonstrate an effective approach toward dynamic reversible full‐color PCL with TSCT‐TADF characteristics. Their single crystals exhibit a full‐color‐gamut process spanning range 170 nm. Moreover, TSCT‐TADF‐PCL display unity photoluminescence quantum yield, show promising application in X‐ray scintillator imaging.
Language: Английский
Citations
23
Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(13), P. 6960 - 6991
Published: Jan. 1, 2024
This review meticulously traces the development of film-based fluorescent sensors, spotlighting key advancements in molecular design and film structural engineering.
Language: Английский
Citations
21
Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(6)
Published: Nov. 8, 2022
Abstract Excitation‐dependent emission (Ex‐de) materials have been of considerable academic interest and potential applications in real life. Such multicolour luminescence is a characteristic exception to the ubiquitously accepted Kasha's rule. This phenomenon has increasingly presented some studies on different systems; however, systematic overview mechanisms underlying this currently absent. Herein, we resolve issue by classifying from single chromophores dual/ternary chromophores, as well multiple emitting species. The processes are described based electronic and/or geometrical conditions under which occurs. Before present it categories, related photophysical photochemical foundations introduced. will provide clear approach designing for special applications.
Language: Английский
Citations
54
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(36), P. 19440 - 19457
Published: Aug. 29, 2023
The utilization of carboranes in supramolecular chemistry has attracted considerable attention. unique spatial configuration and weak interaction forces can help to explore the properties complexes, particularly via host–guest chemistry. Additionally, certain difficulties encountered carborane development─such as controlled B–H bond activation─can be overcome by judiciously selecting metal centers their adjacent ligands. However, few studies are being conducted this nascent research area. With advances field, novel carborane-based complexes will likely prepared, structurally characterized, intrinsically investigated. To expedite these efforts, we present major findings from recent studies, including π–π interactions, associations, steric effects, which have been leveraged implement a regioselective process for activating B(2,9)–, B(2,8)–, B(2,7)–H bonds para-carboranes B(4,7)–H ortho-carboranes. Future should clarify interactions potential enhancing utility complexes. Although exhibit several (such dihydrogen-bond [Bδ+–Hδ−···Hδ+–Cδ−], Bδ+–Hδ−···M+, Bδ+–Hδ−···π interactions), manner they utilized remains unclear. Supramolecular those based on chemistry, platform demonstrating applications interactions. Owing importance alkane separation, related recognition separation isomers primarily summarized. Advances certainly lead more possibilities
Language: Английский
Citations
28
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)
Published: Aug. 11, 2023
Optical force probes that can release force-dependent and visualized signals with minimal changes in the polymer main chains under mechanical load are highly sought after but currently limited. In this study, we introduce a flex-activated mechanophore (FA) based on Diels-Alder adduct of anthracene dimethyl acetylenedicarboxylatea exhibits turn-on mechanofluorescence. We demonstrate when FA is incorporated into networks or its crystalline state, it fluorescent anthracenes through retro-Diels-Alder mechanochemical reaction compression hydrostatic high pressure, respectively. The mechanism successfully confirmed. Furthermore, systematically modulate delivered to by varying crosslinking density applied macroscopic pressures. This modulation leads incremental increases activation, successive anthracenes, quantitative enhancement fluorescence intensity. exceptional potential as sensitive probe different bulk states highlighted, benefiting from unique mode emissive fluorophore releasing. Overall, report enriches our understanding structures functions mechanophores polymeric materials.
Language: Английский
Citations
23
The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(4), P. 849 - 862
Published: Jan. 18, 2024
A year ago, film-based fluorescent sensors (FFSs) were recognized in the "IUPAC Top Ten Emerging Technologies Chemistry 2022" due to their extensive application detecting hidden explosives, illicit drugs, and volatile organic compounds. These offer high sensitivity, specificity, immunity light scattering, noninvasiveness. The core of FFSs is construction high-performance sensing films, which are dependent on processes "energy transfer" "mass active layer involve complex interactions between molecules analytes. This Perspective focuses latest strategies constructing these emphasizing design with various innovative features structures that enhance mass transfer efficiency. Additionally, it discusses ongoing challenges potential advancements field FFSs.
Language: Английский
Citations
13
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(12)
Published: Feb. 1, 2024
Abstract Piezochromic materials that exhibit pressure‐dependent luminescence variations are attracting interest with wide potential applications in mechanical sensors, anticounterfeiting and storage devices. Crystalline porous (CPMs) have been widely studied piezochromism for highly tunable luminescence. Nevertheless, reversible high‐contrast emission response a pressure range is still challenging. Herein, the first example of hierarchical cage‐based πOF ( Cage ‐ 1 ) spring structure was synthesized by using aromatic chiral cages as building blocks. Its elastic properties evaluated based on bulk modulus (9.5 GPa) softer than most reported CPMs collapse point (20.0 significantly exceeds ever CPMs. As smart materials, displays linear achieves difference up to 154 nm. Pressure‐responsive limit 16 GPa, outperforming so far. Dedicated experiments density functional theory (DFT) calculations illustrate π–π interactions‐dominated controllable structural shrinkage porous‐spring‐structure‐mediated elasticity responsible outstanding piezofluorochromism.
Language: Английский
Citations
12
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: April 8, 2024
Abstract Icosahedral carboranes, C 2 B 10 H 12 , have long been considered to be aromatic but the extent of conjugation between these clusters and their substituents is still being debated. m - p -Carboranes are compared with -phenylenes as conjugated bridges in optical functional chromophores a donor an acceptor here. The absorption fluorescence data for both carboranes from experimental techniques (including femtosecond transient absorption, time-resolved broadband upconversion) show that emission processes involve strong intramolecular charge transfer via carborane cluster. From quantum chemical calculations on systems, process depends relative torsional angles groups where overlap two frontier orbitals exists bridging
Language: Английский
Citations
9
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)
Published: May 19, 2023
Stimuli-responsive materials, especially multi-stimuli-responsive can sense external stimuli such as light, heat, and force, have shown great potential in drug delivery, data storage, encryption, energy-harvesting, artificial intelligence. Conventional materials are sensitive to each independent stimulus, causing losses the diversity accuracy of identification for practical application. Herein, a unique phenomenon sequential-stimuli induced stepwise-response generated from elaborately designed single-component organic is reported, which shows large bathochromic shifts up 5800 cm-1 under sequential force light. In contrast response these strictly relies on sequence stimuli, allowing logicality, rigidity, be integrated into one material. The molecular keypad lock built based pointing promising future this logical significant applications. This breakthrough gives new drive classical stimuli-responsiveness provides fundamental design strategy generations high-performance stimuli-responsive materials.
Language: Английский
Citations
20