The mechanism of carbazole (Cz)-based phosphors is still unclear since its isomer (1H-benzo[f]indole, Bd) discovered in 2020. Herein, the successful synthesis four Cz/Bd derivatives reported, named as 2CzBr, CzBdBr, 2BdBr, and 3Bd, general for their ultralong organic phosphorescence (UOP) provided. Bd give double groups phosphorescence, including short-wavelength with a short lifetime at long wavelengths, assigned to neutral molecules radical cations, respectively. Interestingly, doped...

A novel class of organic units (N-1 and N-2) their derivatives (PNNA-1 PNNA-2) with excellent property ultralong room temperature phosphorescence (UORTP) is reported. In this work, N-1, N-2, function as the guests, while powders (PNCz, BBP, DBT) polymethyl methacrylate (PMMA) serve host matrixes. Amazingly, color can be tuned in different states or by varying At 77 K, all molecules show green afterglow monomer state but yellow aggregated because strong intermolecular interactions exist...

1H-Benzo[f]indole (Bd) is a significant phosphorescence unit in the field of room-temperature ultralong organic (RTUOP). However, synthesis Bd rather hard and has low yield, which greatly limits wide applications RTUOP. Therefore, exploring readily obtained alternatives to great significance demands be addressed although it full challenges. Herein, we report new named 5H-benzo[b]carbazole (BCz), can function similarly as BCz facilely via two steps reactions, while requires seven tedious...

We for the first time report photo-activated time-dependent color-changeable ultralong organic room temperature phosphorescence (UORTP) by co-doping derivatives (CN2BdBr and CN2BCzBr) of two units, H -benzo[ f ]indole (Bd) 7 c ]carbazole (BCz).

We successfully tune ultralong organic room-temperature phosphorescence (UORTP) by a simple strategy of precisely modifying nitrogen atoms on Phosphorescence Units, and colorful can be achieved. for the first time investigate structure-function relationship between properties molecular structures Units. With BCz BCz-1 as comparison, eight new Units were synthesized introducing one or two to naphthalene moiety. For all 10 their in PMMA film should assigned monomer from intrinsic T1 decay....

Phosphorescence selective expression in the development of ultralong organic room-temperature phosphorescence (UORTP) materials to enrich properties and functions smart is a very interesting topic but has not been realized yet due lack units. In this work, we, for first time, investigate phenomenon two units single molecule. First, we report new unit 7H-benzo[c]carbazole (BCz) with advantage simple synthesis. BCz derivatives (PNBCz-1 PNBCz-2) feature photoactivated green PMMA film at room...

Open AccessCCS ChemistryRESEARCH ARTICLES1 Mar 2024Matrix-Mediated Color-Tunable Ultralong Organic Room Temperature Phosphorescence of 7H-Benzo[c]carbazole Derivatives Chen Qian†, Xue Zhang†, Zhimin Ma, Xiaohua Fu, Zewei Li, Huiwen Jin, Mingxing Chen, Hong Jiang and Zhiyong Ma Qian† Beijing Advanced Innovation Center for Soft Matter Science Engineering, State Key Laboratory Organic–Inorganic Composites, College Chemical University Technology, 100029 , Zhang† National Molecular Sciences,...

Extending molecular conjugation accurately modulates UORTP in a series of phosphorescence units. (Br)PyCz shows red or NIR ultralong as extended reduces the T 1 energy level and results redshift. A rigid PVA matrix heavy Br atoms enhance UORTP.

How matrixes influence room temperature ultralong organic phosphorescence (RTUOP) in the doping systems is a fundamental question. In this study, we construct guest-matrix by using derivatives (ISO2N-2, ISO2BCz-1, and ISO2BCz-2) of three units (N-2, BCz-1, BCz-2) two (ISO2Cz DMAP) systematically investigate their RTUOP properties. Firstly, intrinsic properties guest molecules were studied solution, pure powder state, PMMA film. Then, doped into with increasing weight ratio. To our surprise,...

Dynamic control of ultralong organic room-temperature phosphorescence (UORTP) is a charming target. Herein, we report stimuli-responsive unit 7H-indolo[2,3-c]quinoline (NBCz) and its derivatives (PCBNBCz, FSO2NBCz, N2BCzSO2NBCz) that show photo- oxygen- synergistically induced afterglow activation color change in the PMMA film. PCBNBCz FSO2NBCz feature donor–acceptor (D–A) structure, N2BCzSO2NBCz features acceptor-bridged two different units (NBCz N2BCz). The photoactivated UORTP arises from...

The same molecule synthesized from different carbazoles may show various properties, which originate the trace isomer in purchased carbazole. By changing content of isomers, phosphorescence lifetime can be quantitatively adjusted.

ABSTRACT Luminescent lanthanide cerium(III) compounds have gathered increasing research interest in both inorganic phosphors and functional molecular complexes. Cerium(III) exhibits broad double‐peak emission originating from 5 d excited state 2 D 3/2 to 4 f ground states F 7/2 5/2 . It is vital adjust the bandwidth of for different applications like lighting display, while no regulation between these two peaks Ce(III) emitters has been reported hitherto. In this work, novel...

With the evolution of modern power systems, proportion renewable energy generation in grid continues to grow. At same time, operation modes have become increasingly complex and dynamic, leading heightened uncertainty disturbance faults. Moreover, electronic equipment exhibits relatively low-level immunity disturbances. The issue frequency stability systems is becoming severe. These factors make pre-programmed control strategies based on strategy tables, which are widely used as second line...

Sanding dolomite strata are widely distributed in southwest China. The safety of the water diversion tunnel Yuxi section Central Yunnan Project has been seriously threatened by geological disasters such as reduction rock strength caused sanding and sand inrush. In order to explore mechanical characteristics obtain parameters quickly accurately, this study relies on Water first established classification standard grade. pore structure, microscopic composition morphological distribution with...

Salt body extraction plays an important role in the analysis of salt structures and exploration oil gas. Seismic attributes edge detection algorithms, which require manual effort, are conventional methods extracting boundaries from seismic images. Convolutional neural networks (CNNs) have become state-of-the-art automatic segmentation method for interpretation. However, fully results may still need to be modified accurate robust enough practical production. We present a novel...

Herein, we successfully synthesized a new organic-inorganic hybrid manganese halide perovskite C5H5NOMnCl2·H2O, in which organic molecules, water molecules (through O atoms), and Cl atoms coordinate with Mn to form deformed [MnO3Cl3] octahedrons. Then, octahedrons chain through edge sharing, resulting 1D-chain single crystal structure. The high-quality C5H5NOMnCl2·H2O prepared by simple solvent evaporation method produced bright red emission at 656 nm attributed the d-d transition of Mn2+....

Herein, we report a novel hybrid organic–inorganic Zr(IV) metal halide ((CH3)4N)2ZrCl6, which demonstrates fascinating excitation-dependent luminescence across the full visible region. The single crystal of ((CH3)4N)2ZrCl6 showed an unexpected high degree symmetry and formed unique 0D structure with isolated [ZrCl6]2– octahedrons. Amazingly, three different emission groups emerged under changeable excitation light. first group peaked at 462 nm ns lifetime μs lifetime, is assigned to...

Abstract Double phosphorescence components from a single organic molecule is rarely reported before because most molecules must follow Kasha's rule and merely emit T 1 state. We discover unique phenomenon of conformation‐controlled expression double components. The green component the red are assigned to dinaphthylamine moiety pyrene unit N,N‐di(naphthalen‐2‐yl)pyren‐1‐amine (NaPy), respectively. NaPy shows time‐dependent excitation‐dependent afterglow color change in copolymerized MMA film...

Two isomers <italic>p</italic>DCzPyCN and <italic>o</italic>DCzPyCN are designed synthesized. Amazingly, manifest white afterglow at room temperature. This is the first time that single-component has finally been realized.