Multicolor Mechanochromic Polymer Blends That Can Distinguish between Tensile–Stress States DOI Creative Commons

Kuniaki Ishizuki,

Akira Takahashi, Hideyuki Otsuka

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Mechanochromic polymers can be used to visualize mechanical stimuli applied materials. However, many of these exhibit single‐color mechanochromism, i.e., the polymer changes from its original color another, thus potentially limiting range applications. Here, a versatile and readily accessible strategy for creating multicolor mechanochromic blends that detect whether material is currently under stress or has already experienced presented. The are prepared by blending segmented polyurethane polycaprolactone, each embedded with radical‐type mechanochromophore. These appear either blue, pink, green stretching depending on mechanochromophore employed. introduction different mechanochromophores into polycaprolactone chain mobilities subsequent affords blend visually distinguish via change it experiencing recently stress. colors observed after tuned as easily mixing paint based combination (“rainbow mechanochromism”). developed in this study expected significantly advance research

Language: Английский

Molecular design and architectonics towards film-based fluorescent sensing DOI
Rongrong Huang, Taihong Liu, Haonan Peng

et al.

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
Biomimetic Photonic Elastomer Exhibiting Stress/Moisture Reconfigurable Wrinkle-Lattice for Reversible Deformation Information Storage DOI

Ruicheng Lin,

Donghui Kou,

Lei Gao

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(20), P. 13346 - 13360

Published: May 10, 2024

Photonic elastomers, capable of converting imperceptible deformations into visible colors, show significant potential in smart materials. However, instantaneous deformation is arduous to record accurately due the disappearance optical information after recovery. Herein, inspired by folding structures iridocytes cephalopods, a stress- and moisture-triggered wrinkling erasure effect proposed be introduced construction photonic elastomer. Implemented dual-network polymer framework with modulatable locking, it allows for reversible storage. The elastomer comprises surface one-dimensional crystal (1DPC) poly(dimethylsiloxane) (PDMS) substrate. deformed 1DPC lattice transforms wrinkled state substrate mismatch, preserving strain-induced structural color through interchain hydrogen bonding crystalline shape-locking polymers. Reading provides multidimensional about degree distribution. Moreover, moisture-induced shape-memory feature can triggered minute amount water, like fingertip perspiration or humidity change (35% 80%), restore original color. This stress/moisture-responsive elastomer, its dynamically reconfigurable wrinkle-lattice, holds great promise applications mechanical sensing, inkless writing, anticounterfeiting, significantly enhancing versatility

Language: Английский

Citations

6
Deformation-Induced Multioptical Morphology Elastomer Constructed from Phosphorescent Nanospheres for Underwater Mechanical Sensing DOI
Changxing Wang,

Yayun Ning,

Yifan Yue

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Combination of multioptical morphology, such as transmission, scattering, fluorescence (FL), and room-temperature phosphorescence (RTP), to build multisignal-integrated devices is highly attractive in future optical but extremely difficult owing the poorly matched material design construction principles. Here, we report a novel morphology elastomer (MOME) fabricated by encapsulating monodisperse RTP SiO2 nanoparticles (RTP-SiO2 NPs) with polydimethylsiloxane (PDMS). The switching behavior signals dependent on deformation MOME, stretching, bending, squeezing. MOME changes from transparent state white scattered under light increases, while FL are significantly enhanced original weak state. During deformation, air voids generated separation RTP-SiO2 NPs PDMS at interface result refractive index mismatch, leading significant enhancement scattering further causing deformation-induced self-scattering RTP. Moreover, also has intriguing modulation phenomena, dynamic deformation-regulated during decay process solvent-deformation synergistically regulated behavior. On account outstanding properties, applied daily visual monitoring underwater pipelines, including displacement deviation, leakage, swelling, localized anomalous protrusions. These findings provide important breakthroughs for integrated devices, demonstrating great potential applications.

Language: Английский

Citations

0
Cellulose-enabled dynamic crosslinking microdomains strategy inducing high strong and tough, reprocessable bio-elastomer for durable self-powered electronic textiles DOI
Chuanwei Lu,

Shijian Xu,

Dongping Tang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161024 - 161024

Published: Feb. 1, 2025

Language: Английский

Citations

0
Distinct off–on fluorescence signal from dual-response lanthanide metal–organic frameworks for ratiometric sensing of anthrax biomarker DOI
Rong Wu, Nan Wang,

Rusi Hao

et al.

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2025, Volume and Issue: unknown, P. 126196 - 126196

Published: April 1, 2025

Language: Английский

Citations

0
Synthesis and Characterization of Cycloocta[1,2-a:6,5-a′]diindene as an Octagon-Containing Nonalternant Isomer of Pentacyclic Benzenoid Aromatic Hydrocarbons with Hidden Diradical Character That Induces Dimerization DOI
Akihito Konishi,

Hidekazu Tokuyama,

Hideki Kitamura

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

Recently, the interest in nonbenzenoid hydrocarbons has resurged, focusing on replacement of two benzenoid hexagons with a pentagon/heptagon pair, which led to abundant azulenoid hydrocarbons. For ortho-fused three or more rings, replacing set pentagons and one octagon is also possible. Following this concept, we designed pentacyclic cyclooctadiindenes 4 5 5-8-5 tricyclic skeleton. Although pronounced open-shell nature hampered its synthesis, five examples were synthesized characterized as stable closed-shell molecules. A thin film 5a exhibited p-type transistor behavior hole mobility 0.63 × 10-2 cm2/(V·s). Optoelectronic measurements clearly showed nonalternant character 5. Heating photoirradiation solution afforded formal [6 + 4] cycloadduct. Theoretical calculations mechanistic investigations revealed occurrence stepwise formation C-C bonds, hidden emerges molecules close contact. Notably, dimeric π-complex 5·5, alleviated. The increased spatial overlap frontier orbitals reduction energy gap facilitate diradical-based bond formations. Our results demonstrate that electronic structures π-stacked compound can be tuned even for monomer compounds negligible character. This study will contribute establishing design strategies novel functional molecular materials based condensed state.

Language: Английский

Citations

0
Cyclooctatetraene‐Embedded Carbon Nanorings DOI

Sheng‐Nan Lei,

Ling Zhu,

Ning Xue

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 29, 2024

Abstract With the prosperity of development carbon nanorings, certain topologically or functionally unique units‐embedded nanorings have sprung up in past decade. Herein, we report facile and efficient synthesis three cyclooctatetraene‐embedded ( COTCNR s) that contain COTCNR1 COTCNR2 ) four COTCNR3 COT units a one‐pot Yamamoto coupling. These feature hoop‐shaped segments Gyroid (G‐), Diamond (D‐), Primitive (P‐) type schwarzites. The conformations trimeric are shape‐persistent, whereas tetrameric possesses flexible skeleton which undergoes conformational changes upon forming host–guest complexes with fullerenes C 60 70 ), whose co‐crystals may potentially serve as fullerene‐based semiconducting supramolecular wires electrical conductivities on order 10 −7 S cm −1 (for ⊂ −8 under ambient conditions. This research not only describes highly one‐step syntheses distinctive topological schwarzites, but also demonstrates potential application electronics one‐dimensional fullerene arrays secured by .

Language: Английский

Citations

2
Liquid Crystalline Pressure-Sensitive Adhesive based on a Shape-Assisted Molecular Assembly with Electron-Deficient Twofold Columnar π-Stacking DOI Creative Commons

Kota Ono,

K. SUGA, Mitsuo Hara

et al.

Published: May 20, 2024

Recently, the chemistry of supramolecular adhesives has rapidly progressed in materials science and tissue engineering. Many structural motifs with a variety non-covalent interactions have been proposed for advanced adhesive properties. Here, we propose new class liquid crystalline pressure-sensitive (LC-PSA). Without aid hydrogen bonding or Coulomb force, cyclooctatetraene(COT)-fused electron-deficient dipyridophenazine dimer (dppz-FLAP) forms tight twofold columnar-stacking based on its V-shaped molecular structure (π-π distance: 3.32 Å). With dppz-FLAP core as mesogen crystal, high shear LC-PSA bearing well-defined packing hexagonal columnar phase developed. Both hydrophobic hydrophilic glass substrates can be easily bonded at room temperature by simply pressing flake sample between substrates. Tensile strengths reached approximately 1 MPa glass, SUS Fe dispersion interaction significant ductility, while easy peelability PET tape was confirmed. The rigid formed shape-assisted assembly results cohesive force material, soft properties provide sufficient fluidity PSA. Viscoelastic analysis revealed unique position (G′~10^7 Pa, G′′~10^6 Pa) compared conventional PSAs. concept rigid/soft hybridization hydrogen-bond-free engineering extends potential functional small-molecule materials.

Language: Английский

Citations

2
Mechanistically Different Mechanochromophores Enable Calibration and Validation of Molecular Forces in Glassy Polymers and Elastomeric Networks DOI Creative Commons

Raphael Hertel,

Maximilian Raisch, Michael Walter

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(49)

Published: Aug. 13, 2024

Abstract Sterically distorted donor‐acceptor π‐systems, termed DA springs, can be progressively planarized under mechanical load causing a bathochromic shift of the photoluminescence (PL) spectrum. By combining theory and experiment, we here use simple linear force calibration for two different conformational mechanochromophores to determine molecular forces in polymers from mechanochromic PL wavelength during multiple uniaxial tensile tests. Two systems are used, i) highly entangled glassy polyphenylene ii) covalent elastomeric polydimethylsiloxane network. The mean estimated by this method validated using known threshold mechanochemical ring‐opening reactions spiropyran probes. agreement between both approaches underlines that these springs provide unique opportunity online monitoring local present diverse polymer matrices.

Language: Английский

Citations

2
A Nonbenzenoid 3D Nanographene Containing 5/6/7/8-Membered Rings DOI Creative Commons
Pengcai Liu,

Hao-Han Lv,

Xue Rui

et al.

Organic Materials, Journal Year: 2024, Volume and Issue: 06(02), P. 40 - 44

Published: March 20, 2024

Nanographenes (NGs) have attracted continuous attention in recent years owing to their opened bandgaps and optoelectronic applications. Especially, nonbenzenoid NGs containing non-six-membered rings been developed rapidly due unique structures properties. In this work, we employ acepleiadylene (APD) the cyclooctatetraene (COT) moiety construct first three-dimensional (3D) NG 5/6/7/8-membered one molecule (COT-APD). The calculated results prove that COT-APD has a saddle-like configuration similar of other COT-type molecules. Each APD segment keeps inherent aromaticity moiety. Compared with molecules, shows narrower bandgap, which indicates superiority bandgap regulation. Furthermore, four reversible reductive waves are observed electrochemical characterizations, demonstrating excellent electron-accepting capability COT-APD.

Language: Английский

Citations

1