Photo-triggered full-color circularly polarized luminescence based on photonic capsules for multilevel information encryption

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 25, 2023

Materials with phototunable full-color circularly polarized luminescence (CPL) have a large storage density, high-security level, and enormous prospects in the field of information encryption decryption. In this work, device-friendly solid films color tunability are prepared by constructing Förster resonance energy transfer (FRET) platforms chiral donors achiral molecular switches liquid crystal photonic capsules (LCPCs). These LCPCs exhibit photoswitchable CPL from initial blue emission to RGB trichromatic signals under UV irradiation due synergistic effect chirality show strong time dependence because different FRET efficiencies at each node. Based on these response characteristics, concept multilevel data using LCPC is demonstrated.

Language: Английский

---

Smart chiral liquid crystal elastomers: Design, properties and application

Smart Molecules, Journal Year: 2024, Volume and Issue: 2(1)

Published: Feb. 29, 2024

Abstract Smart chiral liquid crystal elastomers are a class of soft photonic crystals with periodic nanostructures. There two kinds structural colors: cholesteric one‐dimensional helical nanostructure and blue‐phase three‐dimensional nanostructure. The self‐assembled can be dynamically controlled under external stimulation, the reflected color adjusted throughout visible light range. Along development innovative material systems cutting‐edge manufacturing technologies, researchers have proposed diverse strategies to design synthesize thoroughly investigated their properties potential applications. Here, we provide systematic review progress in fabrication smart elastomers, focusing on via surface‐enforced alignment, bar coating, 3D printing, anisotropic deswelling methods as well self‐assembly without additional alignment. able respond quickly stimuli wide range applications areas such adaptive optics, color‐changing camouflage, robotics, information encryption. This concludes perspective opportunities challenges for future elastomers.

Language: Английский

---

Sophisticated yet Convenient Information Encryption/Decryption Based on Synergistically Time‐/Temperature‐Resolved Photonic Inks

Advanced Science, Journal Year: 2022, Volume and Issue: 10(5)

Published: Dec. 11, 2022

Exploring high-safety but convenient encryption and decryption technologies to combat threats of information leakage is urgently needed remains a great challenge. Here, synergistically time- temperature-resolved coding/decoding solution based on functional photonic inks demonstrated. Encrypted messages can be stored into multiple channels with dynamic-color patterns, only enabled at appointed temperature time points. Notably, the ink easily processed quick-response codes multipixel plates. With high transparency responsive color variations controlled by compositions ambient temperatures, advanced 3D stacking multichannel coding Morse techniques applied for multi-information storage, complex anticounterfeiting, interference. This study paves an avenue design development dynamic high-end anticounterfeiting applications.

Language: Английский

---

Configurationally Confined Multilevel Supramolecular Assemblies for Modulating Multicolor Luminescence

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(22)

Published: Feb. 22, 2023

Abstract Herein, multilevel supramolecular assemblies are reported based on sulfobutylether‐β‐cyclodextrin (SBE‐βCD) and cucurbit[8]uril (CB[8]), which can control the topological morphology from nanoparticles to nanosheets modulate multicolor luminescence. Benefiting large cavity of CB[8] its strong binding affinity with positively charged tetraphenylethylene pyridinium (TPE‐Py), a 1:2 stoichiometric assembly is formed through host–guest interactions constants 2.95 × 10 11 M −2 fluorescence bathochromic shift about 35 nm due macrocyclic confinement effect, thereby endowing enhancement 20 times when further assembled negatively SBE‐βCD form electrostatic interactions. In contrast, direct TPE‐Py interactions, showing only tenfold no lack effect. After doping near‐infrared dye acceptor sulfonated aluminum phthalocyanine (AlPcS4), structure exhibits higher energy transfer efficiency 75% larger antenna effect 29.3 than that nanoparticles. The be used in luminescence information storage multiple logical gate systems, providing an efficient approach for configurationally confined regulation luminescent materials.

Language: Английский

---

Responsive materials based on coordination bonds

Deleted Journal, Journal Year: 2023, Volume and Issue: 1(2)

Published: Sept. 4, 2023

Abstract Responsive materials can respond to different external stimuli by changing their chemical or/and physical properties, thus being useful for various applications such as drug delivery, bioimaging, actuators, and sensors. A common strategy constructing responsive is introduce dynamic covalent bonds or noncovalent interactions into polymer systems. Compared with other bonds, coordination have the peculiarity that bond strength dissociation rate be tuned a greater extent. Such tunability makes uniquely advantageous in stimuli‐responsive materials. Herein, we summarize recent progress of based on are classified seven categories, is, thermo‐responsive, photo‐responsive, electro‐responsive, mechano‐responsive, chemo‐responsive, pH‐responsive, materials, according type stimuli. The corresponding mechanism, design strategy, research status each category comprehensively summarized. Finally, prospects challenges development discussed.

Language: Английский

---

Multilevel Information Encryption Based on Thermochromic Perovskite Microcapsules via Orthogonal Photic and Thermal Stimuli Responses

ACS Nano, Journal Year: 2024, Volume and Issue: 18(16), P. 10874 - 10884

Published: April 13, 2024

Increasing modal variations of stimulus-responsive materials ensure the high capacity and confidentiality information storage encryption systems that are crucial to security. Herein, thermochromic perovskite microcapsules (TPMs) with dual-variable quadruple-modal reversible properties designed prepared on original oil-in-fluorine (O/F) emulsion system. The TPMs respond orthogonal external UV thermal stimuli in four switchable modes exhibit excellent thermal, air, water stability due protection perovskites by core-shell structure. Benefiting from high-density TPMs, multiple encryptions decryptions demonstrated. Moreover, a set devices assembled for multilevel By taking advantage as "private key" decryption, signal can be identified corresponding binary ASCII code converted real message. results demonstrate breakthrough well system based TPMs.

Language: Английский

---

Light-Driven Aqueous Dissipative Pseudorotaxanes with Tunable Fluorescence Enabling Deformable Nano-Assemblies

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(8), P. 11004 - 11015

Published: Feb. 18, 2023

Developing an artificial dynamic nanoscale molecular machine that dissipatively self-assembles far from equilibrium is fundamentally important but significantly challenging. Herein, we report self-assembling light-activated convertible pseudorotaxanes (PRs) show tunable fluorescence and enable deformable nano-assemblies. A pyridinium-conjugated sulfonato-merocyanine derivative (EPMEH) cucurbit[8]uril (CB[8]) form the 2EPMEH ⊂ CB[8] [3]PR in a 2:1 stoichiometry, which phototransforms into transient spiropyran containing 1:1 EPSP [2]PR when exposed to light. The thermally relaxes (reversibly) dark accompanied by periodic changes include near-infrared emission. Moreover, octahedral spherical nanoparticles are formed through dissipative self-assembly of two PRs, Golgi apparatus dynamically imaged using fluorescent

Language: Английский

---

Aromatic Bridged Bis(triphenylamine) Cascade Assembly Achieved Tunable Nanosupramolecular Morphology and NIR Targeted Cell Imaging

ACS Nano, Journal Year: 2023, Volume and Issue: 17(19), P. 19349 - 19358

Published: Oct. 2, 2023

Possessing four cationic pyridium groups, phenyl-bridged bis(triphenylamine) derivatives (G1, G2) were encapsulated by cucurbit[8]uril (CB[8]) at a 1:2 stoichiometry to form the network-like organic two-dimensional nanosheet, which could efficiently enhance near-infrared (NIR) luminescence and companies with red-shift from 750 810 nm for G1. Benefiting supramolecular multivalent interaction, α-cyclodextrin modified hyaluronic acid (HACD) G1/CB[8] formed nanoparticles further NIR behaviors. Compared short rigid aromatic bridged derivative (G2), assembly derived G1 long flexible arms gives larger Stokes shift, coassembles phosphorescent bromophenylpyridinium derivative/CB[8] pseudorotaxane, leading efficient resonance energy transfer (PRET). Especially, nanoparticle showed delayed fluorescence under 308 light excitation an ultralarge shift up 502 nm, was successfully applied in targeted cell imaging.

Language: Английский

---

Supramolecular dissipative self‐assembly systems: Approaches and applications

Deleted Journal, Journal Year: 2023, Volume and Issue: 1(2)

Published: Oct. 18, 2023

Abstract Dissipative self‐assembly (DSA) system requires a continuous supply of fuels to maintain the far‐from‐equilibrium assembled state. Living organisms exist and operate far from thermodynamic equilibrium by consumption energy taken surroundings, so how realize construction artificial DSA has attracted much attention researchers all over world. Owing dynamic controllable noncovalent interactions, supramolecular systems have achieved higher functions fueled various types energy, such as chemical fuels, light, electric acoustic mechanical energy. Upon input external nonactive precursors can be activated form building blocks at levels then self‐assemble into transient structures. As proceeding deactivation reaction, with level dissipate back initial precursors, resulting in disassembly process, complete full cycle. In this review, we summarize recent advances on its strategies energy‐fueled regulation approaches. The applications luminescence modulating, information encryption, self‐regulating gels, drug delivery, catalysis are also discussed. We hope that review article will facilitate further understanding development systems.

Language: Английский

---

Slide‐Ring Supramolecular Mechanoresponsive Elastomer with Reversible Luminescence Behavior

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(7)

Published: Feb. 8, 2023

Abstract A solid slide‐ring supramolecular elastomer is constructed by free‐radical polymerization of 2‐(2‐methoxyethoxy)ethyl methacrylate, acrylate‐modified perylene diimides (PDI), and the polyrotaxane (PR) cross‐linker. Benefiting from reciprocating shuttle function PR formed α‐cyclodextrin threading on polyethylene glycol, resultant not only presents excellent tensile property, toughness, fatigue resistance up to 100 cycles, but also gives reversible mechano‐induced fluorescence changes red orange luminescence due a conversion PDI dimer monomer upon mechanical stretching. After dye molecule Nile blue added as fluorescent acceptor, exhibits highly regulation energy transfer can perform five cycles without optical fatigue. This bifunctional mechanochromic elastomer, which possesses mechanically motion cross‐linkers has response fluorophore, endows intrinsic superiority into resistant mechanoresponsive strain sensing materials.

Language: Английский

---