A5071196133- Luminescence and Fluorescent Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Nanoplatforms for cancer theranostics
- Molecular Sensors and Ion Detection
- Organic Light-Emitting Diodes Research
- Synthesis and Properties of Aromatic Compounds
- Organic Electronics and Photovoltaics
- Dendrimers and Hyperbranched Polymers
- Conducting polymers and applications
- Polydiacetylene-based materials and applications
- Supramolecular Self-Assembly in Materials
- Perovskite Materials and Applications
- Supramolecular Chemistry and Complexes
- Advanced biosensing and bioanalysis techniques
- Photochromic and Fluorescence Chemistry
- Synthesis and properties of polymers
- Photodynamic Therapy Research Studies
- Porphyrin and Phthalocyanine Chemistry
- Liquid Crystal Research Advancements
- Crystallography and molecular interactions
- Click Chemistry and Applications
- Organoboron and organosilicon chemistry
- Photoreceptor and optogenetics research
- Synthetic Organic Chemistry Methods
Hong Kong University of Science and Technology
2016-2025
University of Hong Kong
2016-2025
City College of New York
1984-2025
City University of Hong Kong
2024
HKUST Shenzhen Research Institute
2014-2023
Chinese University of Hong Kong, Shenzhen
2021-2023
Camden and Campbelltown Hospitals
2023
University of Science and Technology
2023
Wuhan University
2023
Western Sydney University
2023
Aggregation greatly boosts emission efficiency of the silole, turning it from a weak luminophor into strong emitter.
It is textbook knowledge that chromophore aggregation generally quenches light emission. In this feature article, we give an account on how observed opposite phenomenon termed aggregation-induced emission (AIE) and identified the restriction of intramolecular rotation as a main cause for AIE effect. Based mechanistic understanding, developed series new fluorescent phosphorescent systems with colours covering entire visible spectral region luminescence quantum yields up to unity. We explored...
A series of ten 2,3,4,5-tetraphenylsiloles with different 1,1-substituents [XYSi(CPh)4] were prepared, and three these, i.e., 1,1,2,3,4,5-hexaphenylsilole [X = Y Ph (3)], 1-ethynyl-1,2,3,4,5-pentaphenylsilole Ph, C⋮CH (15)], 1,1-bis(phenylethynyl)-2,3,4,5-tetraphenylsilole C⋮CPh (18)], characterized crystallographically. The ground- excited-states the siloles influenced by inductive effect 1,1-substituents: an increase in their electronegativity, absorption emission spectra bathochromically...
Boron dipyrromethene (BODIPY) derivatives 1 and 2 consisting of donor acceptor units with dual photoresponses to solvent polarity luminogen aggregation are developed through taking advantage twisted intramolecular charge transfer (TICT) aggregation-induced emission (AIE) processes. In nonpolar solvents, the locally excited (LE) states BODIPY luminogens emit intense green lights. Increasing brings from LE state TICT state, causing a large bathochromic shift in color but dramatic decrease...
Efficient solid-state emitters developed by a new approach are described. While emission from triphenylamine (TPA) and its dimer (DTPA) is weakened aggregation, attaching tetraphenylethene (TPE) units to the amines boosts their efficiencies up 100% in aggregate state without harming hole-transport properties. The resultant 3TPETPA 4TPEDTPA luminogens show excellent electroluminescence performance. Detailed facts of importance specialist readers published as "Supporting Information". Such...
Phosphorescence has rarely been observed in pure organic chromophore systems at room temperature. We herein report efficient phosphorescence from the crystals of benzophenone and its derivatives with a general formula (X-C6H4)2C═O (X = F, Cl, Br) as well methyl 4-bromobenzoate 4,4′-dibromobiphenyl under ambient conditions. These luminogens are all nonemissive when they dissolved good solvents, adsorbed on TLC plates, doped into polymer films, because active intramolecular motions such...
Luminescent materials with efficient solid-state emissions are important for the advancement of optoelectronics. Recently, a new class propeller-like luminogenic molecules aggregation-induced emission (AIE) characteristics has drawn increasing research interest. Among them, tetraphenylethene (TPE) is an archetypal luminogen simple molecule structure but shows splendid AIE effect. Utilizing TPE as building block, effective strategy to create emitters developed. In this feature article, we...
Abstract The development of single molecule white light emitters is extremely challenging for pure phosphorescent metal-free system at room temperature. Here we report a organic phosphor, namely 4-chlorobenzoyldibenzothiophene, emitting temperature phosphorescence with Commission Internationale de l’Éclair-age coordinates (0.33, 0.35). Experimental and theoretical investigations reveal that the emission emerged from dual phosphorescence, which emit first second excited triplet states. We...
Tracking the dynamics of mitochondrial morphology has attracted much research interest because its involvement in early stage apoptosis and degenerative conditions. To follow this process, highly specific photostable fluorescent probes are demand. Commercially available mitochondria trackers, however, suffer from poor photostability. overcome limitation, we have designed synthesized a agent, tetraphenylethene-triphenylphosphonium (TPE-TPP), for imaging. Inherent mitochondrial-targeting...
In-depth discussion on recent progress of fundamental understanding AIE mechanisms, identifying the existing challenges and opportunities for future developments.
Polyacetylene (PA) is a Nobel Prize-winning macromolecule. In this work, PA molecularly functionalized, which endows it with an array of new functional properties. The molecular functionalization realized by attachment pendants to the polyene backbone. Our efforts in catalyst exploration and reaction optimization have led syntheses large number derivatives carrying groups. Polymer reactions are exploited as alternative route PAs that difficult or impossible access direct polymerizations...
Abstract Aggregation‐induced emission (AIE) has been harnessed in many systems through the principle of restriction intramolecular rotations (RIR) based on mechanistic understanding from archetypal AIE molecules such as tetraphenylethene (TPE). However, family AIE‐active grows, RIR model cannot fully explain some phenomena. Here, we report a broadening mechanism analysis 10,10′,11,11′‐tetrahydro‐5,5′‐bidibenzo[a,d][7]annulenylidene (THBDBA), and 5,5′‐bidibenzo[a,d][7]annulenylidene (BDBA)....
Planar donor and acceptor (D–A) conjugated structures are generally believed to be the standard for architecting highly efficient photothermal theranostic agents, in order restrict intramolecular motions aggregates (nanoparticles). However, other channels of extra nonradiative decay may blocked. Now this challenge is addressed by proposing an "abnormal" strategy based on molecular motion aggregates. Molecular rotors bulky alkyl chains grafted central D–A core lower intermolecular...
Aggregation in poor solvents and complexation with calf thymus DNA bovine serum albumin turn "on" the fluorescence of tetraphenylethylene derivatives, due to restriction intra-molecular rotations dyes aggregates complexes.
Nonemissive tetraphenylethene (TPE) 1 and its diphenylated derivative 2 were induced to emit intensely by aggregate formation. Crystalline aggregates of the dyes emitted bluer lights than their amorphous counterparts. The emissions TPE could be switched off on continuously reversibly wetting dewetting with solvent vapors, respectively, manifesting ability optically sense volatile organic compounds. light-emitting diodes fabricated from turned at ∼2.9 ∼5V blue maximum luminance ∼1800...
Emissive electron donor–acceptor (D–A) conjugates have a wide variety of applications in biophotonics, two-photon absorption materials, organic lasers, long wavelength emitters, and so forth. However, it is still challenge to synthesize high solid-state efficiency D–A structured emitters due the notorious aggregation-caused quenching (ACQ) effect. Though some systems are reported show aggregation-induced emission (AIE) behaviors, most only selectively AIE-active highly polar solvents,...