Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 157905 - 157905
Опубликована: Ноя. 1, 2024
Язык: Английский
Advanced Materials, Год журнала: 2024, Номер 36(32)
Опубликована: Июнь 4, 2024
Abstract Developing high‐performance polarization‐sensitive ultraviolet photodetectors is crucial for their application in military remote sensing, detection, bio‐inspired navigation, and machine vision. However, the significant absorption visible light range severely limits of photodetectors, such as high‐quality anti‐interference imaging. Here, based on a wide‐bandgap organic semiconductor single crystal (trans‐1,2‐bis(5‐phenyldithieno[2,3‐b:3′,2′‐d]thiophen‐2‐yl)ethene, BPTTE), solar‐blind with dichroic ratio close to 4.26 are demonstrated. The strong anisotropy 2D grown BPTTE crystals molecular vibration optical characterized by various techniques. Under voltage modulation, stable efficient detection polarized demonstrated, attributed intrinsic transition dipole moment bc plane, rather than other factors. Finally, high‐contrast polarimetric imaging successfully demonstrated highlighting potential semiconductors photodetectors.
Язык: Английский
Процитировано
15
Journal of the American Chemical Society, Год журнала: 2024, Номер 146(38), С. 26178 - 26186
Опубликована: Сен. 16, 2024
Triboelectric nanogenerators (TENGs) have proven to be effective at converting mechanical energy into electrical power, making them a viable technology for operating self-powered electronic devices used in medical diagnostics and environmental monitoring. In the present study, we demonstrate utility of flexible single crystals an organic compound fabrication TENG as tactile sensor. Triboelectrification was attained result surface functionalization with positively negatively charged moieties, viz. Zn
Язык: Английский
Процитировано
6
The Journal of Physical Chemistry Letters, Год журнала: 2024, Номер 15(28), С. 7335 - 7341
Опубликована: Июль 10, 2024
Here, a barbituric acid derivative containing pyrene rings (DPPT) was successfully synthesized, and two types of crystals were prepared by using crystal engineering methods. Orange sheet-like (DPPT-O, observed in visible light), DCM/CH3OH solution, exhibited brittleness weak fluorescence emission, along with sunlight-induced bending fracturing. Red needle-like (DPPT-R, also synthesized DCM/CH3CN demonstrated elastic properties, strong excellent optical waveguide performance (with an loss coefficient 0.23-0.30 dB mm-1). Single-crystal data analysis revealed that the stacking arrangement molecules critically influenced elasticity crystals, while reaction cavity size regulated photomechanical properties crystals. This study achieved effective control over sunlight responsiveness flexible transmission for first time, providing innovative insights application homogeneous organic polycrystalline molecular this field.
Язык: Английский
Процитировано
3
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Апрель 7, 2025
The development of camouflage materials that are adapted to various environmental conditions and actively switch can greatly improve stealth reliability. However, the with stimulus-responsive structural colors in conjunction electro-optical properties liquid crystal ability their optical under remains a major challenge. Here, breakthrough bilayer polymer dispersed (PDLC) system integrated electron-transferring organic compound microcapsules (ETOCM) was presented achieve multimodal adaptation through synergistic electrical/thermal triggering. hybrid were able between different colors, transparency, scattering states, maintained high contrast at lower driving voltages. Among which, PDLC doped ETOCM is used for thermally triggering color shift without leaking dye; UV intensity controlled by zonal polymerization process produce localized pattern permits stepwise electric-field-driven decryption. In flexible dual-layer design PVA separator layer, areas exceeds 100 easily visible naked eye. Unlike previous static or single-stimulus systems, material dynamically adapt environments. By coordinating thermochromic electro-optic mechanisms, fast multiresponse dual encryption (thermal/electric field) achieved. This work bridges gap adaptive real-world applications, offering transformative potential information security wearable technology.
Язык: Английский
Процитировано
0
Advanced Science, Год журнала: 2025, Номер unknown
Опубликована: Апрель 15, 2025
Abstract Thermally responsive molecular crystals exhibiting programmable mechanical motions hold significant promise for applications in smart actuators, sensors, and drug delivery systems. However, achieving precise control over their phase transition thermodynamics remains a fundamental challenge. A series of isomorphic 5‐fluorocytosine/fatty acid cocrystals is reported where the temperatures vary across an interval 100 K with increasing alkyl chain. Two distinct pathways are unveiled: i) cooperative single‐crystal‐to‐single‐crystal (II‐III) accompanied by explosive motions, ii) reconstructive (I‐III) following classical nucleation‐growth mechanisms. The induces remarkable expansion, striking +64.4% expansion along layer stacking direction −16.9% contraction perpendicular to (001) plane, leading dynamic phenomena such as jumping, rotating, splitting. Notably, ( T t, II‐III ) exhibit linear dependence on coformer chain length (from C10 C18), correlation attributed interlayer hydrophobic interactions. This work provides versatile approach designing tunable thermo‐mechanical properties, offering new opportunities advanced functional materials.
Язык: Английский
Процитировано
0
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Апрель 17, 2025
Dynamic molecular crystals with a desirable morphology and controllable responses to external stimuli are highly desired but remain challenging. Here, we present new photoactive crystal (MCA) featuring naphthalene backbone linked vinyl structure an asymmetric tail. It can undergo reversible head-to-tail [2 + 2] photodimerization under visible light illumination heating. Helicoidally twisted crystalline fibers be easily prepared by drop-casting MCA ethanol solution onto glass surface. The thread length fiber width regulated changing the solvent evaporation temperature. An untwists upon irradiation twists back mild heating due dissociation of metastable photodimer (d-MCA), enabling reverse transformation. Crystallinity overall helical reserved well during untwisting twisting cycles, allowing multiple repetitions dynamic motions. Under interval excitation continuous heating, perform cyclical untwisting-twisting motions over 200 times for 5 h. amount significantly affects photoresponse, resulting in fully partial twisting, or complete at different dimer fractions. We found that about 10% d-MCA is enough drive circular movements. Higher photoproduct conversion makes prone fatigue lose cyclic responses. Our results provide excellent example fabricating organic soft robotics photoactuators based on spiral
Язык: Английский
Процитировано
0
Dyes and Pigments, Год журнала: 2025, Номер 241, С. 112846 - 112846
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2024, Номер unknown
Опубликована: Авг. 17, 2024
Abstract The utilization of organic crystals in visible light communication (VLC) technologies necessitates affordable light‐emitting diodes (LEDs) as sources to run photonic devices. A sustainable strategy is demonstrated utilizing a commercial ultravoilet (UV) LED source power flexible crystal waveguides ( Z )‐3‐(3′,5′‐bis(trifluoromethyl)‐[1,1′‐biphenyl]‐4‐yl)‐2‐(4‐methoxyphenyl) acrylonitrile (CF 3 OMe), 9,10‐bis(phenylethynyl)anthracene (BPEA), and 2,2′‐((1 E ,1′ )‐hydrazine‐1,2‐diylidenebis(methaneylylidene))diphenol (SAA), transducing their respective blue, orange, yellow fluorescence signals. focused LED's capability includes i) exciting extremely bent waveguides, ii) evanescently SAA waveguide via energy transfer from CF OMe waveguide, iii) selectively splitting various signals using 2 × hybrid directional coupler based on SAA‐BPEA crystals. These demonstrations underscore the practicality proposed technique for applications systems related VLC.
Язык: Английский
Процитировано
1
Journal of Molecular Structure, Год журнала: 2024, Номер 1321, С. 139805 - 139805
Опубликована: Авг. 26, 2024
Язык: Английский
Процитировано
1
Chemical Science, Год журнала: 2024, Номер 15(42), С. 17444 - 17452
Опубликована: Янв. 1, 2024
Flexible organic crystals, capable of transmitting light and responding to various external stimuli, are emerging as a new frontier in optoelectronic materials. They hold immense potential for applications molecular machines, sensors, displays, intelligent devices. Here, we report on flexible crystals based single-component enantiomeric compounds, demonstrating multi-stimuli-responsive circularly polarized (CPL). These exhibit remarkable elasticity, responsiveness acid vapors, tunable optical signals. Upon exposure the fluorescence shifts from initial yellow emission green emission, attributable protonation-induced inhibition excited-state intramolecular proton transfer. Under UV irradiation, undergoes red-shift, resulting transformation an enol configuration ketone configuration. Notably, both processes reversible can be restored under daylight. The integration changes vapors CPL signals, waveguides within single crystal paves way application all-organic chiral functional
Язык: Английский
Процитировано
1