Unprecedented dual aggregation-induced emission (AIE) behavior based on a steric-hindrance photochromic system is presented, with incorporation one or two bulky aryl groups, resulting in different flexibleness. The AIE of open and closed isomers can be explained by restriction intramolecular rotation (RIR), vibration (RIV), intermolecular stacking. large benzothiophene causes restricted rotation, enhancing the form solution weak π-π molecular packing, thereby efficiently luminescence...

The fast light-responsive dithienylethenes (DTEs) are one of the most attractive photochromic families because their excellent thermal irreversibility and fatigue resistance. However, all-visible-light-activated DTE system still remains challenging them require harmful high-energy ultraviolet light to trigger photocyclization reaction. Here, we have for first time borrowed a specific intramolecular proton transfer (IPT) process rationally designed series all-visible-light-driven DTEs....

ConspectusPhotochromic diarylethenes featuring reversible regulation by external light irradiation have attracted increasing attention in versatile applications such as logic gates, supramolecular systems, liquid crystals, and super-resolution imaging because of their outstanding bistability fatigue resistance. However, for typical diarylethene there always exist three unsolved issues. The first is how to modulate the between open closed forms from viewpoint ethene bridge aromaticity. second...

Active engineering and modulation of optical spectra in a remote fully reversible light is urgently desired photonics, chemistry, materials. However, the real-time regulation multiple information such as wavelength, bandwidth, reflectance, polarization still longstanding issue due to lack an appropriate photoresponsive candidate. Herein, we propose additional "degree-of-freedom (DOF)" photo-modulated soft helix, build up unprecedented inhomogeneous helical pitch length with...

Abstract Light-driven transcription, replication and enzyme catalysis are critically dependent upon a delicate transfer between molecular supramolecular chirality. Chemists have well realized the impressive stereospecificity over many thermally accessible cycloaddition with chiral catalysts, but making light work in enantiomer control of diarylethene photocyclization has proved to be more challenging. Here, we report unique sterically hindered (BBTE) system absolute enantiospecific...

Dynamic and multi-dimensional manipulation of laser emission with light allows for optical coding, computing, imaging photonic chips. However, the coupling balance between resonance transmission is a formidable challenge due to uncontrollable chiral microcavity photo-reversibility, which limited multi-freedom sustainable repeatable output beams. Herein, helical superstructure system unique intrinsic photoswitch developed resolving always pendent problems on organized defects in microcavity....

Dynamic chiral superstructures are of vital importance for understanding the organization and function chirality in biological systems. However, achieving high conversion efficiency photoswitches nanoconfined architectures remains challenging but fascinating. Herein, we report a series dynamic based on supramolecular metallacages through coordination-driven self-assembly dithienylethene (DTE) units octahedral zinc ions, thereby successfully an ultrahigh photoconversion yield 91.3% nanosized...

In the process of smart breeding, rapid statistics soybean emergence rate, as an important part breeding screening, face challenges under environmental constraints, especially selection and varieties in dense environments. Due to influence factors, existing methods have shortcomings, such low throughput, efficiency, insufficient precision. Therefore, effective precise statistical method is required. this study, UAV (Unmanned Aerial Vehicle)-scale data combined with ground measurement were...

Multifunctional switches, as well gated photochromism, are particularly challenging. Here, a ferrocene (Fc)‐modified photochromic diarylethene (DAE) with sterically hindered ethene bridge, in which the photo‐inactive parallel conformer and photoactive antiparallel individually investigated, is reported. The photoswitchable triad system (parallel p‐Fc anti‐parallel ap‐Fc ) contains three functional parts: DAE unit, naphthalimide chromophore, redox‐active ferrocene. Upon incorporation of...

Abstract Unprecedented dual aggregation‐induced emission (AIE) behavior based on a steric‐hindrance photochromic system is presented, with incorporation one or two bulky aryl groups, resulting in different flexibleness. The AIE of open and closed isomers can be explained by restriction intramolecular rotation (RIR), vibration (RIV), intermolecular stacking. large benzothiophene causes restricted rotation, enhancing the form solution weak π–π molecular packing, thereby efficiently...

The scaffold sizes and shapes of a series photoswitchable metallacycles are precisely controlled by the conformer photoresponsive units.

Creating flexible materials with multi-dimensional security holds great promise for anti-counterfeiting labels in food, currency, and pharmaceuticals, but it is proven extremely challenging. Herein, we propose a photoresponsive liquid crystal polymer (LCP) film by incorporating polymerizable photoswitch into commercial LCP ultraviolet (UV) light exposure. Reversible photochromism can be observed between light- dark-red under UV visible irradiation alternatively, accompanying variation of...

In dissolved gas analysis of transformers, methane is one the key indicators for fault diagnosis, thus accurate detection means a lot early transformer failure caused by partial discharge or overheat. Photoacoustic Spectroscopy (PAS) combined with Tunable Diode Laser (TDL) as light source, to provide high precision and selectivity in measurement, especially conditions trace measurement limited length sample volume. By constructing an experimental platform, intensity, linearity, stability...

When ultraviolet (UV) absorption spectroscopy technology is used for nitric oxide (NO) detection, the background noise will directly affect accuracy of concentration inversion, especially in low concentrations. Traditional processing methods attempt to eliminate noise, which damages spectrum characteristics. However, stochastic resonance (SR) can utilize extract a weak characteristic signal. This paper reports monostable (MSR) model an UV NO spectrum. By analyzing characteristics NO,...

Abstract Tetraphenylethene (TPE), a star building block with promising aggregation‐induced emission, has received much interest. Given that its intramolecular Woodward‐Hoffmann cyclic intermediate instantaneously converts back to the original state within several picoseconds, essentially photochromic characteristic of TPE is little investigated. Achieving visible photocyclization still an unsolved issue and considered as bottleneck in further advancement applications. We report strategy...