The high pressure structures, metallization and superconductivity of recently synthesized H2-containing compounds (H2S)2H2 are elucidated by ab initio calculations. ordered crystal structure with P1 symmetry is determined, supported the good agreement between theoretical experimental X-ray diffraction data, equation states Raman spectra. Cccm favorable partial hydrogen bond symmetrization above 37 GPa. Upon further compression, H2 molecules disappear two intriguing metallic structures R3m...

A chameleon under pressure: The observed piezochromic behavior of the title compound (BP2VA) was found to depend on its molecular aggregation state and specifically strength π–π interaction between anthracene rings adjacent molecules. When BP2VA is ground or placed pressure, changes, a red shift in fluorescence emission from green via orange occurs (see picture). Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not...

Solid-state organic photoswitches with reversible luminescence modulation property are highly attractive because of their wide prospects in advanced photonic applications, such as optical data storage, anticounterfeiting and bioimaging. Yet, developing materials has long been a significant challenge. In this work, we construct an efficient solid-state photoswitch based on spiropyran-functionalized distyrylanthracene derivative (DSA-2SP) that exhibits exceptional absorption/luminescence...

The molecular crystals of acridonyl‐tetraphenylethene (AD‐TPE) exhibit an intriguing turn‐on and color‐tuned luminescence in response to mechanical grinding hydrostatic compression. On the basis in‐depth experimental computational studies, it is hypothesized that origin piezochromic behavior from D‐phase B‐phase change intramolecular geometrical conformation, especially for torsion angle between TPE AD moiety. different conformation two distinctive solid phases causes substantial switching...

We demonstrated compact SnO₂thin films prepared by sinter-less spin-coating processes as an electron selective contact for CH₃NH₃PbI₃-based planar-heterojunction perovskite solar cells (PSCs).

We have studied the crystal structures and photophysical properties of four 9,10-distyrylanthracene (DSA) derivatives. Their exhibit nonplanar conformations due to supramolecular interactions resulting in rigid molecules relative tight stacking. The DSA derivatives possess a typical aggregation-induced emission (AIE) property, i.e., they faint their solutions but intense crystals as result dominant nonradiative decay by free intramolecular torsion solution restricted torsional motion...

The present study of structure–property relationships and disclosure fascinating amplified spontaneous emission (ASE) behavior an organic molecule not only exhibits the individual effect molecular conformation arrangement on properties crystal separately, but also indicates that some concealed elegant solids can be achieved through manipulating polymorphic form. As a service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer...

Abstract The development of organic fluorophores with efficient solid‐state emissions or aggregated‐state in the red to near‐infrared region is still challenging. Reported herein are having aggregation‐induced emission ranging from orange far red/near‐infrared (FR/NIR) region. bioimaging performance designed fluorophore shown have potential as FR/NIR fluorescent probes for biological applications.

Research on aggregation-induced emission (AIE) has been a hot topic. Due to enthusiastic efforts by many researchers, hundreds of AIE luminogens (AIEgens) have generated which were mainly based archetypal silole, tetraphenylethene, distyrylanthracene, triphenylethene, and tetraphenyl-1,4-butadiene, etc. To enlarge the family AIEgens enrich their functions, new are in high demand. In this work, we report kind AIEgen tetraphenylpyrazine (TPP), could be readily prepared under mild reaction...

Abstract We report the first example of an AIEgen (DPP‐BO) with fluorescence–phosphorescence dual emission under mechanical stimulation. By carefully analyzing crystal structure DPP‐BO, efficient intermolecular and intramolecular interactions should account for its unique mechanoluminescence (ML) properties, especially abnormal phosphorescence, as further confirmed by controlled experiments theoretical calculations presence ISC transitions. These results provide important information...

Abstract Organic molecular aggregates have attracted widespread attention over the past decade owing to their unique optoelectronic properties in aggregate state, which mainly involves effects of aggregation structure as well packing mode. Although many examples H‐ and J‐aggregates defined by exciton model been found, there are also other types unconventional aggregates, especially for aggregation‐induced emission (AIE) system. In this review, recent progress some basic novel forms,...

Abstract As promising candidates in the field of artificial muscles, ionic‐polymer–metal composites (IPMCs) still cannot simultaneously provide large deformations and fast responses, which has limited their practical applications. In this study, to overcome issue, a Nafion‐based IPMC with high‐quality metal electrodes is fabricated via novel isopropanol‐assisted electroless plating. The exhibits tip displacement (35.3 mm, 102.3°) under low direct‐current driving voltage ultrafast response...

A novel divinylanthracene derivative 9,10-bis((E)-2-(pyridin-4-yl)vinyl)anthracene (BP4VA) was synthesized and its two polymorphs with different crystal structures were obtained. The introduction of pyridine in BP4VA leads to multi-stimuli responsive fluorescence. An investigation the photophysical stimuli luminescent properties BP4VA, including piezochromism protonation effect, demonstrates that piezochromic luminescence originates from changes molecular aggregation state. Additionally,...

Piezochromic luminescent materials that exhibit distinct luminescence responses to different types of mechanical stresses have been emerging as new kinds which are rarely investigated. Herein, we report a donor-acceptor (D-A) charge-transfer (CT) cocrystal, shows hypochromatic and bathochromatic shifts upon anisotropic grinding isotropic compression, respectively. Detailed spectroscopic structural analyses revealed the shifted emission under is attributable reorganization from loosely...

ConspectusMolecular photoswitches with drastically switchable luminescent properties have attracted increasing attention due to their unique advantages in nondestructive and high-contrast read-out systems, which feature promising applications optoelectronic devices, data storage, optical imaging. In general, common organic photoswitches, capable of undergoing reversible structural changes between two photoisomers solution state, exhibit markedly different response light stimuli. However, the...

Solution processable small molecules have been widely applied for photovoltaic (PV) devices in recent years because they show strong absorption properties, and can be easily purified deposited onto flexible substrates at low cost. Introducing different donor acceptor groups to construct donor–acceptor (D–A) structure has proved an efficient way improve the properties of organic solar cells (OSCs). This review deals with progress solution D–A discusses key factors affecting OSCs based on...

A tetraphenylethene-bridged pillarene tetramer with aggregation-induced emission properties forms an A4/B2-type supramolecular polymer and a gel symmetric neutral guest linker, showing remarkable fluorescence enhancement in solution the solid state good responsiveness to temperature solvent composition.

Three functionalized 9,10-distyrylanthracene (DSA) derivatives, namely, 9,10-bis(4-hydroxystyryl)anthracene (2), 9,10-bis{4-[2-(diethylamino)ethoxy]styryl}anthracene (4), and 9,10-bis{4-[2-(N,N,N-triethylammonium)ethoxy]styryl}anthracene dibromide (5), were synthesized their fluorescence properties investigated. The three DSA derivatives possess a typical aggregation-induced emission (AIE) property (i.e., they are nonluminescent in dilute solutions but efficiently fluorescent as induced by...

An AIE-active luminophore with tunable and remarkable fluorescence switching based on the piezo protonation–deprotonation control was prepared investigated.

Cross dipole stacking based on a novel fluorescent molecule, 9,10-bis (2,2-diphenylvinyl) anthracene (BDPVA), is presented. The butterfly-like structure of BDPVA the key feature to form unique aggregation and such mode highly beneficial for fluorescence emission, resulting in high-performance amplified spontaneous emission electroluminescence BDPVA.

Bilayer polymer anode composed of poly(3,4-ethylene-dioxythiophene): polystyrenesulfonate (PEDOT:PSS) (PH500) and PEDOT:PSS (Baytron P VP Al 4083) was used to construct flexible solar cells on plastic substrates polyethylene terephthalate (PET) with a device structure PET/polymer anode/APFO-3:PCBM/LiF∕Al. The power conversion efficiency (PCE) the indium tin oxide (ITO)-free achieved 2.2% under illumination AM1.5 (100mWcm−2), which is 80% PCE reference ITO glass. simplicity preparing bilayer...