The design and synthesis of highly efficient deep red (DR) near-infrared (NIR) organic emitting materials with characteristic thermally activated delayed fluorescence (TADF) still remains a great challenge. A strategy was developed to construct TADF solid films strong DR or NIR emission feature. triphenylamine (TPA) quinoxaline-6,7-dicarbonitrile (QCN) were employed as electron donor (D) acceptor (A), respectively, synthesize compound, TPA-QCN. TPA-QCN molecule orange-red in solution dopant...

An organic crystal adopts a molecular packing that can be readily perturbed by external stresses like tensile forces, isotropic pressure, and anisotropic pressure through mechanical smashing, grinding, compressing, respectively. As result, the crystals display mechanoluminescence (ML) in response to different stimuli. The present study provides model which three distinct MLs are combined into one material. service our authors readers, this journal supporting information supplied authors....

Abstract Inserting polymers into a crystalline inorganic matrix to understand the structure, position, and structure–property relationships of resulting composites is important for designing new inorganic‐organic materials tuning their properties. Single crystals polymer‐chalcogenide were successfully prepared by trapping polyethyleneglycol within selenidostannate under surfactant‐thermal conditions. This work might provide strategy preparing novel polymer‐inorganic through encapsulating...

Highly efficient long-wavelength thermally activated delayed fluorescence (TADF) materials are developed using 2,3-dicyanopyrazino phenanthrene (DCPP) as the electron acceptor (A), and carbazole (Cz), diphenylamine (DPA), or 9,9-dimethyl-9,10-dihydroacridine (DMAC) donor (D). Because of large, rigid π-conjugated structure strong electron-withdrawing capability DCPP, TADF molecules with emitting colors ranging from yellow to deep-red realized different electron-donating groups π-conjugation...

Abstract Reported herein is a molecular design strategy of deep‐blue emitters for resolving the lack highly efficient organic light‐emitting diodes (OLEDs) featuring CIE y (Commission Internationale de l'Eclairage) color coordinates matching display requirements (<0.1). The to combine weak spiro‐donor and spiro‐acceptor groups into linear donor‐π‐acceptor type thermally‐activated delayed fluorescence molecule through sterically bulky π‐spacer. endows an emitter with emission, narrower...

Six new zinc-1,3,5-benzenetricarboxylate-based metal–organic frameworks (MOFs) have been successfully synthesized using three different surfactants (PEG 400, octanoic acid, and hexadecyltributylphosphonium bromide) as reaction media. These with characteristics, such being neutral, acidic, cationic, demonstrated to show strong effects on directing the crystals’ growth resulted in secondary building units (SBUs) including an unusual SBU unit [Zn4(μ4-O)(CO2)7]. Our results clearly indicated...

The synthesis of two alkyl substituted quinacridone derivatives, N,N'-di(n-hexyl)-1,3,8,10-tetramethylquinacridone (1) and N,N'-di(n-hexyl)-2,9-di(t-butyl)quinacridone (2), four dendritic N,N'-didendritic-1,3,8,10-tetramethylquinacridones (3-G1 3-G2) N,N'-didendritic-2,9-di(tert-butyl)quinacridones (4-G1 4-G2) are reported. X-ray crystal structure thermal analysis revealed that the derivatives reported in this paper exhibit evolution from crystalline phase to amorphous upon varying...

Bendable (elastic and plastic) organic single crystals have been widely studied as emerging flexible materials with highly ordered packing structures. However, even though manifold bendable recently reported, most of them bend in response to only one stimulus. Herein, we report an crystal (Z)-4-(1-cyano-2-(4-(dimethylamino)phenyl)vinyl)benzonitrile, which bends under external stress (physical process) also hydrochloric acid atmosphere (chemical process). This observation indicates that a...

Abstract A novel thermally activated delayed fluorescence (TADF) molecule, PHCz2BP, is synthesized and used to construct high performance organic light‐emitting diodes (OLEDs) in this work. PHCz2BP not only the neat emitting layer for efficient sky‐blue OLED, with very peak external quantum efficiency/power efficiency (EQE/PE) values of 4.0%/6.9 lm W −1 , but also acts as a host sensitize high‐luminance high‐efficiency green, orange, red electrophosphorescence universal EQEs >20%. More...

A pure organic molecule 2,6-di(phenothiazinyl)naphthalene (DPTZN) with room-temperature phosphorescence (RTP) features was developed. Remarkably, a triazine-benzimidazole-based TRZ-BIM can significantly improve the RTP efficiency of DPTZN in DPTZN:TRZ-BIM blend films. The photoluminescence quantum yield (PLQY) 10 wt % film is 38%. property films characterized by steady, time-resolved, and temperature-dependent emission spectra. An light-emitting diode (OLED) as emitting layer showed high...

Abstract The study of elastic organic single crystals becomes a hot research field in the crystal engineering, and bending needle‐like has been carefully investigated recently. Herein, based on structurally simple molecule dimethyl 2,5‐diaminoterephthalate (DMDAT), which display not only ability but also twisting under applied stress are reported. These ribbon‐like DMDAT fully flexible can be freely bended twisted, thus forming any 3D conformation. Moreover, unique X‐shaped tetrasubstituted...

Organic single crystals with elastic bending capability and potential applications in flexible devices sensors have been elucidated. Exploring the temperature compatibility of elasticity is essential for defining application boundaries materials. However, related studies rarely reported organic crystals. Now, an crystal displays even liquid nitrogen (77 K). The can be maintained below ca. 150 °C. At higher temperatures, heat setting property enables us to make various shapes crystalline...

With the increasing popularity and burgeoning progress of space technology, development ultralow-temperature flexible functional materials is a great challenge. Herein, we report highly emissive organic crystal combining elasticity self-waveguide properties (when excited, it emits light from itself, which travels through to other end) based on simple single-benzene emitter. This displayed excellent elastic bending ability in liquid nitrogen (LN). Preliminary experiments optical waveguiding...

In recent years, the porous sorbent-assisted atmospheric water harvesting (AWH) method has emerged as an effective approach for solving crises without geographical restrictions. However, there is a limited array of adsorbent materials that can be used AWH, which are inadequate to meet needs under different climatic conditions. light this, herein, we synthesize new crystalline organic salt (CPOS; denoted CPOS-6) possessing dual hydrogen bond system and verify its applicability toward AWH...

The use of mechanically flexible molecular crystals as optical transuding media is demonstrated for a plethora applications; however, the spectral peaks outputs located mainly in range 400-600 nm are insufficient practical telecommunication and full-color display applications. Herein, two elastically bendable organic reported that show red emission rec.709 gamut under 365 UV light irradiation yet generate rec.2020 waveguides amplified spontaneous emissions when irradiated by 355 laser....

Down to the wire: PtII⋅⋅⋅PtII interactions provide cohesive driving force for construction of micro- and nanometer-scale luminescent wires, such as nanowires [Pt(CNtBu)2(CN)2] (see picture; Pt pink, N blue, C gray), which is a potential candidate applications in nano-optical, electronic, sensory devices.

The synthesis and single-crystal X-ray structures of two quinacridone derivatives, N,N'-di(n-butyl)quinacridone (1) N,N'-di(n-butyl)-1,3,8,10-tetramethylquinacridone (2), are reported, the 1H NMR, absorption, photoluminescent (PL), electroluminescent (EL) characteristics presented. Both these crystal characterized by intermolecular pi...pi hydrogen bonding interactions. interactions lead to formation molecular columns in solids 1 2, interplanar contact distances between adjacent molecules...

Highly efficient, low driving-voltage, and emitter concentration insensitive phosphorescent EL devices are established for the first time by using an amidinate-ligated iridium(III) complex as emitting component.

Two deep blue emitting materials PPI-PPITPA and PPI-PPIPCz with dual carrier transport properties small singlet-triplet splitting features are designed synthesized. were used not only as non-doped layers to fabricate highly efficient OLEDs, but also hosts construct high performance green, yellow red phosphorescent OLEDs.

A novel organosilane compound Si(PPI)₂ with good carrier-transport ability has been used as an efficient host for high-performance fluorescent pure-blue and phosphorescent green/red OLEDs.

Two novel four-coordinate boron-containing emitters 1 and 2 with deep-blue emissions were synthesized by refluxing a 2-(2-hydroxyphenyl)benzimidazole ligand triphenylborane or bromodibenzoborole. The boron chelation produced new π-conjugated skeleton, which rendered the materials intense fluorescence, good thermal stability, high carrier mobility. Both compounds displayed in solutions very fluorescence quantum yields (over 0.70). More importantly, samples showed identical solution solid...

White-light-emitting single molecules have attracted broad attention because of their great potential for use in flat-panel displays and future light sources. We report a unique molecule 3-(diphenylamino)-9H-xanthen-9-one (3-DPH-XO), which was found to exhibit bright white-light emission the solid state caused by spontaneous formation mixture with different polymorphs. Single-crystal analyses demonstrate that noncovalent interactions (such as π···π stacking, hydrogen bonding, C–H···π...

From atomic level to understand the cluster-size-dependant behavior of dye-sensitized photocatalysts is very important and helpful design new photocatalytic materials. Although relationship between behaviors particles' size/shape has been widely investigated by theoretical scientists, experimental evidences are much less. In this manuscript, we successfully synthesized three ruthenium polyoxometalates (POM-n, n relate different size clusters) with different-sized POM clusters. Under...

A high external quantum efficiency of 7.68% was achieved in a near-infrared organic light-emitting diode with novel TADF molecule.