Abstract Azobenzenes are classical molecular photoswitches that have been widely used. In recent endeavors of design, replacing one or both phenyl rings with heteroaromatic has emerged as a strategy to expand diversity and access improved photoswitching properties. Many mono‐heteroaryl azo molecules unique structures and/or properties developed, but the potential bis‐heteroaryl architectures is far from fully exploited. We report family azobispyrazoles, which combine (near‐)quantitative...

Photochemical crystal ↔ liquid transitions (PCLTs) are interesting phenomena that couple reversible photochemical transformations with thermophysical phase transitions. A potential application of PCLTs is the development photoresponsive smart materials capable exerting adhesion capacities on specific surfaces at a desired timing, which unattainable for conventional adhesives. However, PCLT-based adhesives generally use UV light as stimulus, could lead to degradation and health problems....

An optimal temperature is crucial for a broad range of applications, from chemical transformations, electronics, and human comfort, to energy production our whole planet. Photochemical molecular thermal storage systems coupled with phase change behavior (MOST-PCMs) offer unique opportunities capture regulate temperature. Here, we demonstrate how series visible-light-responsive azopyrazoles couple MOST PCMs provide release below 0 °C. The system charged by blue light at -1 °C, discharges in...

The development of light-responsive chemical systems often relies on the rational design and suitable incorporation molecular photoswitches such as azobenzenes. Linking a photoswitch core with another π-conjugated entity may give rise to intramolecular electronic coupling, which can dramatically impair function. Decoupling strategies have been developed based additionally inserting linker that disrupt through-bond communication. Here we show 1,2,3-triazole—a commonly used decoupling...

Abstract In recent decades, polymer semiconductors, extensively employed as charge transport layers in devices like organic field‐effect transistors (OFETs), have undergone thorough investigation due to their capacity for large‐area solution processing, making them promising mass production. Research efforts been twofold: enhancing the mobilities of semiconductors and augmenting mechanical properties meet demands flexible devices. Significant progress has made both realms, propelling...

Photoswitches can absorb solar photons and store them as chemical energy by photoisomerization, which is regarded a promising strategy for photochemical storage. Although many efforts have been devoted to photoswitch discovery, the efficiency, critical fundamental parameter assessing conversion ability, has attracted little attention remains be studied comprehensively. Here we provide systematic evaluation of efficiency typical azo-switches including azobenzenes azopyrazoles, gain...

Abstract Polymer semiconductors hold tremendous potential for applications in flexible devices, which is however hindered by the fact that they are usually processed halogenated solvents rather than environmentally more friendly solvents. An effective strategy to boost solubility of high‐performance polymer nonhalogenated such as tetrahydrofuran (THF) appending hydroxyl groups side chains herein presented. The results show groups, can be easily incorporated into chains, significantly improve...

Linear silanes are efficient molecular wires due to strong σ-conjugation in the transoid conformation; however, structure–function relationship for conformational dependence of single-molecule conductance remains untested. Here we report syntheses, electrical measurements, and theoretical characterization four series functionalized cyclic bicyclic including a cyclotetrasilane, cyclopentasilane, bicyclo[2.2.1]heptasilane, bicyclo[2.2.2]octasilane, which all extended by linear silicon linkers...

The single-molecule conductance of silanes is suppressed due to destructive quantum interference in conformations with cisoid dihedral angles along the molecular backbone. Yet, despite structural similarity, σ-interference effects have not been observed alkanes. Here we report that methyl substituents used are a prerequisite for these systems. Through density functional theory calculations, find evident same extent nonmethylated silanes. We true alkanes as transmission significantly...

ABSTRACT The aberrant behavior of lipid droplets (LDs) is often indicative cellular dysfunction, which may contribute to the development a range diseases, particularly metabolic dysfunction‐associated steatotic liver disease (MASLD) and atherosclerosis (AS). Consequently, there an urgent need develop fluorescence probes targeting LDs monitor progression disease. In this study, unanticipated one‐pot boron tribromide (BBr₃)/boron trichloride (BCl₃)‐promoted cyclization reaction was discovered,...

We report a para -quinodimethane skeleton ( p -QDM)-based polycyclic aromatic hydrocarbon (PAH) with heptenes as end-capping groups and F-substituents in the central six-membered ring.

Here we examine the impact of ring conformation on charge transport characteristics cyclic pentasilane structures bound to gold electrodes in single molecule junctions.

The research on p-type polymer semiconductors has achieved significant progress in terms of material diversity and device performance, while the performance n-type lagged far behind. design synthesis electron-deficient building blocks are essential for development high-performance semiconductors. Herein, we report a new unit, 3,4,7,8-benzo[1,2-b:4,5-b′]dithiophenedimides (BDTI), its derivative dibromide BDTI, which further employed to construct BDTI-based donor–acceptor copolymers. These...

Abstract Photo‐patterning of polymer semiconductors using photo‐crosslinkers has shown potential for organic circuit fabrication via solution processing techniques. However, the performance patterning, including resolution ( R ), UV light exposure dose, sensitivity S and contrast γ remains unsatisfactory. In this study, a novel conjugated based photo‐crosslinker PN3 , Figure 1a) is reported first time, which entails phenyl‐substituted azide groups in its side chains. Due to π – interactions...

Abstract Azobenzenes are classical molecular photoswitches that have been widely used. In recent endeavors of design, replacing one or both phenyl rings with heteroaromatic has emerged as a strategy to expand diversity and access improved photoswitching properties. Many mono‐heteroaryl azo molecules unique structures and/or properties developed, but the potential bis‐heteroaryl architectures is far from fully exploited. We report family azobispyrazoles, which combine (near‐)quantitative...

High-performance organic devices with dynamic and stable modulation are essential for building adaptable to the environment. However, existing reported incorporating light-activated units exhibit either limited device stability or subpar optoelectronic properties. Here, we synthesize a new optically tunable polymer dielectric functionalized photochromic arylazopyrazole cis-isomer half-life of as long 90 days. On this basis, dual-mode transistors that can be reversibly modulated successfully...

A number of quinoidal molecules with symmetric end-capping groups, particularly dicyanomethylene units, have been synthesized for organic optoelectronic materials. In comparison, dissymmetric molecules, characterized by different are less explored. this paper, we present the unexpected formation new formal which end-capped both and triphenylphosphonium moieties. The structures these were firmly verified single crystal structural analyses. On basis control experiments DFT calculations,...

Vinyl-containing conjugated polymers exhibiting extended skeletons with long-wavelength absorption and high carrier mobility have been widely investigated as polymer semiconductors. However, a new vinyl-flanked diketopyrrolopyrrole (DPP) unit the...

We show the strategy of introducing azobenzene groups into graphene nanoribbons (GNRs), which not only endows GNRs with fast photo-responsiveness but also induces self-assembly ultra-long nanowires.

Upside-down bottles containing water which are common in our daily life exhibit rich vibration dynamics. Rich dynamic regimes observed bottle oscillators by directly measuring the pressure difference between inside and outside of a with aid sensors. We observe experimentally that an asymmetrical oscillation process outflow inflow air is formed single oscillator and, addition, kind 2:1 frequency synchronization occurs coupled system two non-identical oscillators. The peak values differences...

Azobenzenes are classical molecular photoswitches that have received widespread application. In recent endeavors of design, replacing one or both phenyl rings by heteroaromatic ones is emerging as a strategy to expand the diversity and access improved photoswitch properties. However, currently available heteroaryl azo switches generally show limitations on E ⇆ Z photoisomerization yields and/or -isomer stability. Here we report family azobispyrazoles new photoswitches, which combine...