A novel white-light-emitting organic molecule, which consists of carbazolyl- and phenothiazinyl-substituted benzophenone (OPC) exhibits aggregation-induced emission-delayed fluorescence (AIE-DF) mechanofluorochromic properties was synthesized. The CIE color coordinates OPC were directly measured with a non-doped powder, presented white-emission (0.33, 0.33) at 244 K to 252 (0.35, 0.35) 298 K. asymmetric donor-acceptor-donor' (D-A-D') type an accurate inherited relationship from...

Distyrylanthracene derivatives, AnP3 and AnP3P with triphenylethylene end-groups, AnP4 AnP4P tetraphenylethylene were synthesized characterized using nuclear magnetic resonance, mass spectrometry, elemental analysis, photoluminescence, ultraviolet-visible absorption, wide-angle X-ray diffraction, differential scanning calorimetry other techniques. The results show that the piezofluorochromic properties of these four aggregation-induced enhanced emission (AIEE) compounds influenced...

Abstract Chemical modification of phenothiazine‐benzophenone derivatives tunes the emission behavior from triplet states by selecting geometry intramolecular charge transfer (ICT) state. A fundamental principle planar ICT (PICT) and twisted (TICT) is demonstrated to obtain selectively either room temperature phosphorescence (RTP) or thermally activated delayed fluorescence (TADF), respectively. Time‐resolved spectroscopy time‐dependent density functional theory (TD‐DFT) investigations on...

Abstract Chemical modification of phenothiazine‐benzophenone derivatives tunes the emission behavior from triplet states by selecting geometry intramolecular charge transfer (ICT) state. A fundamental principle planar ICT (PICT) and twisted (TICT) is demonstrated to obtain selectively either room temperature phosphorescence (RTP) or thermally activated delayed fluorescence (TADF), respectively. Time‐resolved spectroscopy time‐dependent density functional theory (TD‐DFT) investigations on...

A new ligand containing tetraphenylethylene and terpyridine moieties, its zinc ion complex were synthesized. Both of them exhibit an aggregation-induced emission effect. Their colors emissions can be smartly switched by various external stimuli including grinding, heating solvent-fuming, as well exposure to acid base vapors.

Four novel D–D–π–A configuration metal-free organic dyes (C3, P2, C2 and P3) with triphenylethylene phenothiazine moieties or carbazole as additional electron donors for dye-sensitized solar cells (DSSCs) have been synthesized. The based on C3, P3 efficiencies of 2.14%, 2.69%, 5.51% 6.55%, respectively, are obtained. cell exhibits the highest efficiency 6.55% accompanied by a short-circuit current density (Jsc) 12.18 mA cm−2, rather high open-circuit photovoltage (Voc) 826 mV, fill factor...

Abstract A novel white‐light‐emitting organic molecule, which consists of carbazolyl‐ and phenothiazinyl‐substituted benzophenone (OPC) exhibits aggregation‐induced emission‐delayed fluorescence (AIE‐DF) mechanofluorochromic properties was synthesized. The CIE color coordinates OPC were directly measured with a non‐doped powder, presented white‐emission (0.33, 0.33) at 244 K to 252 (0.35, 0.35) 298 K. asymmetric donor–acceptor–donor′ (D‐A‐D′) type an accurate inherited relationship from...

Abstract Near infrared (NIR) light excitable photosensitizers are highly desirable for photodynamic therapy with deep penetration. Herein, a NIR‐II (1200 nm) activated photosensitizer TQ‐BTPE is designed aggregation‐induced singlet oxygen ( 1 O 2 ) generation two‐photon cancer cell ablation. shows good absorption and bright NIR‐I emission upon laser excitation. The produced by in an aqueous medium much more efficient than that of commercial Ce6 under white irradiation. Upon excitation, the...

Abstract Fluorescent probes capable of in vivo lipids labeling are highly desirable for studying lipid‐accumulation‐related metabolic diseases, such as nonalcoholic fatty liver disease, type‐2 diabetes, and atherosclerosis. However, most the current lipid‐specific fluorophores cannot be used due to their strong hydrophobicity. Herein, organic dots from bright luminogens with aggregation‐induced emission (AIEgen) developed three‐photon fluorescence imaging lipid‐rich tissues, liver,...

Photoluminescence quantum yield (PLQY) is one of the most important characteristics for organic luminescent materials. However, when carbazole prepared from lab was compared to that a commercial source, remarkable change PLQY observed vary 37.1% 69.8%. Taking 9-(4-bromobenzyl)-9H-carbazole (CzBBr) as an example derivatives, PLQYs CzBBr synthesized different origins were varied 16.0% 91.1%. Our studies demonstrated efficient radiative transition pathways activated based luminescence, leading...

Doping has shown very promising potential in endowing room-temperature phosphorescence (RTP) properties of organic phosphors with minimal effort. Here, a new isomer design and doping strategy is reported that applicable to dibenzothiophene (DBT) its derivatives. Three isomers are synthesized study the dopant effect on enhancing RTP DBT It found dopants bearing close resemblance host matched highest occupied molecular orbital (HOMO) lowest unoccupied (LUMO) energy levels small difference...

Traditional antibacterial procedures are getting inefficient due to the emergence of antimicrobial resistance, which makes alternative treatments in urgent demand. However, selectivity toward infectious bacteria is still challenging. Herein, by taking advantage self-directed capture macrophages, we developed a strategy realize precise vivo photodynamic therapy (APDT) through adoptive photosensitizer-loaded macrophage transfer. TTD with strong reactive oxygen species (ROS) production and...

We report an in-depth photophysical investigation of asymmetric donor–acceptor–donor′ (D–A–D′) thermally activated delayed fluorescence (TADF) molecule (4-(9H-carbazol-9-yl)phenyl)(4-(10H-phenothiazin-10-yl)phenyl)sulfone and compare its properties to the parent symmetric D–A–D D′–A–D′ molecules. These type small molecules all show strong TADF. The work reveals how relative orientations D–A (D′–A) moieties favor reverse intersystem crossing (rISC) by forming stable charge transfer (CT)...

A novel series of highly similar and comparable metal-free organic dyes have been designed synthesized for dye-sensitized solar cells (DSSCs). The end-capped groups, namely, diphenylethylene, triphenylethylene, tetraphenylethylene, significant effects on the performance DSSCs. DSSC based a triphenylethylene dye exhibits highest power conversion efficiency (η) 6.29%, whereas that tetraphenylethylene has open-circuit photovoltage (Voc) 804 mV. Voc DSSCs can be greatly improved upon...

The delivery of imaging agents to brain tumor sites has been a longstanding hindrance, because the presence blood-brain barriers (BBB) and complex microenvironment. living cell-based system shown tantalizing prospects for therapeutic applications targeting oncological diseases. Herein, we design lipid-decorated molecular photoacoustic contrast agent TFML, which can effectively label harvested live neutrophils without affecting activation transmigration functions. After labeling with TFML...

Abstract Isomerization is an essential chemical process that often evokes dramatic change of chemical, physical, or biological properties. For a long time, isomerization has been known as transformation induced by certain external energy such light, heat, mechanical force. Herein, new phenomenon described, which does not require but simply occurs during molecular packing. The proposed demonstrated series symmetric donor–acceptor–donor (D–A–D) molecules, the donor may adopt two different...

Abstract Nanocrystals (NCs) are widely used in optoelectronics, photocatalysis, and bioimaging. As the surface area to volume ratio increases with a decrease size of NCs, strategies control NCs highly valuable for many applications. Given importance photoluminescent dyes, especially those aggregation‐induced emission, transformation from an amorphous crystalline state can yield drastic enhancement their optical properties, which is significance biomedical Till now, there no general method...

The precise treatment of cancer requires maximized lesion to cells and minimized damage normal cells; however, the current theranostic nanomaterials have limited generic specificity cells. Herein, as a proof concept, small-molecular system simultaneously possessing on-site fluorescence light-up feature, universal cell selectivity, controllable subcellular localization, activated therapeutic function is developed for theranostics. These molecular probes are composed photosensitizers (PSs)...

Commercial carbazole has been widely used to synthesize organic functional materials that entwine with the recent breakthroughs in thermally activated delayed fluorescence, luminescent radicals and laser diodes. Recently, strategy of stabilizing triplet excited states derivatives ignited booming development room temperature afterglow (RTA). The unusual RTA its was elaborated by crystal quality packing. However, impurity hypotheses have under debate for nearly a century. Here we show an...

<p>Commercial carbazole has been widely used to synthesize organic functional materials that entwine with the recent breakthroughs in thermally activated delayed fluorescence, luminescent radicals and laser diodes. Recently, strategy of stabilizing triplet excited states derivatives ignited booming development room temperature afterglow (RTA). The unusual RTA its was elaborated by crystal quality packing. However, impurity hypotheses have under debate for nearly a century. Here we show...