Celebration of the 20th anniversary of aggregation-induced emission with research highlights from Royal Society of Chemistry journals
Fengyan Song, Bin Liu and Ben Zhong Tang introduce the celebration of the 20th anniversary of aggregation-induced emission with research highlights from Royal Society of Chemistry journals.
Metal free room temperature phosphorescence from molecular self-interactions in the solid state
Purely organic materials showing solid state room temperature phosphorescence (RTP) are receiving an ever growing interest due to their low toxicity, cost and environmental load compared to their organometallic counterparts.
A self-delivery DNA nanoprobe for reliable microRNA imaging in live cells by aggregation induced red-shift-emission
A Y-shape and pyrene-modified DNA self-assembly is developed to sensitively and specifically detect microRNA through a pyrene excimer–monomer switch.
AIE-active micelles formed by self-assembly of an amphiphilic platinum complex possessing isoxazole moieties
We report a luminescent micelle that is prepared through the self-assembly of an amphiphilic, neutral Pt(II) complex with isoxazole moieties in THF/water on account of its aggregation-induced emission (AIE) property.
Surface-grafted polyacrylonitrile brushes with aggregation-induced emission properties
Polyacrylonitrile (PAN) brushes were grafted from silicon wafers by photoinduced ATRP and shown to exhibit aggregation-induced emission (AIE) properties.
Identifying glioblastoma margins using dual-targeted organic nanoparticles for efficient in vivo fluorescence image-guided photothermal therapy
Dual-targeted organic nanoparticles efficiently target the margin of glioblastoma and successfully suppress the tumour growth through photothermal therapy.
Rational design of substituted maleimide dyes with tunable fluorescence and solvafluorochromism
We herein present a simple methodology to systematically expand the scope of maleimide-based dyes and also provide an insight into the relationship between substitution pattern and optical properties.
A cyanine-based fluorescent cassette with aggregation-induced emission for sensitive detection of pH changes in live cells
A novel fluorescent cassette consisting of a TPE donor and a cyanine acceptor was developed for sensitive detection of pH changes in live cells.
Aggregation-induced emission in precursors to porous molecular crystals
Trigonal fluorinated pyrazoles assemble into porous molecular crystals and show solid-state fluorescence. However, their emission behavior in solution is dramatically different.
Diarylboryl-phenothiazine based multifunctional molecular siblings
Molecular siblings 1 and 2 are constructed from triarylboron and phenothiazine moieties and showed multifunctional characteristics such as AIE, mechanofluorochromism, triboluminescence and temperature sensing.
A stable tetraphenylethene derivative: aggregation-induced emission, different crystalline polymorphs, and totally different mechanoluminescence properties
Two crystalline polymorphs of TMPE (Cp-form and Cc-form) exhibit totally different mechanoluminescence properties.
Integration of aggregation-induced emission and delayed fluorescence into electronic donor–acceptor conjugates
Aggregation-induced emission and delayed fluorescence are observed simultaneously for the luminogens with an electron-donor and acceptor framework.
A light-up probe with aggregation-induced emission characteristics (AIE) for selective imaging, naked-eye detection and photodynamic killing of Gram-positive bacteria
We report a multifunctional light-up probe based on AIEgens for selective recognition, naked-eye identification, and photodynamic killing of Gram-positive bacteria including vancomycin-resistant strains.
Direct evidence to support the restriction of intramolecular rotation hypothesis for the mechanism of aggregation-induced emission: temperature resolved terahertz spectra of tetraphenylethene
THz-TDS and computational modelling reveal temperature dependent structural changes that correlate with fluorescence.
Lighting up thiolated Au@Ag nanoclusters via aggregation-induced emission
A simple synthesis strategy for highly luminescent thiolated Au@Ag nanoclusters with aggregation-induced emission was developed.
A conical intersection model to explain aggregation induced emission in
Aggregation induced emission in diphenyl dibenzofulvene occurs because access to a conical intersection seam is blocked in the solid state.
Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole
The butterfly effect in bisfluorenylidene-based dihydroacenes: aggregation induced emission and spin switching
Difluorenylidene dihydroanthracene with a butterfly-like structure exhibits both aggregation induced emission (AIE) and thermally activated ground-state spin switching properties.
Molecular design of near-infrared fluorescent Pdots for tumor targeting: aggregation-induced emission versus anti-aggregation-caused quenching
This article presents the first work to fundamentally study the effect of steric hindrance in Pdot systems.
Chiral molecular face-rotating sandwich structures constructed through restricting the phenyl flipping of tetraphenylethylene
Complex arrangements of tetraphenylethylene motifs resulted in a variety of chiralities of face-rotating sandwich structures (FRSs).
Structure and formation of highly luminescent protein-stabilized gold clusters
Findings on the structure and formation of luminescent protein-stabilized gold clusters reveal interlocked gold-thiolate rings and a unique bio-assembled pathway.
AIE-active theranostic system: selective staining and killing of cancer cells
A mitochondrion-specific AIEgen is a theranostic molecule, with the function of lighting up and killing cancer cells rather than normal cells.
Tuning the singlet-triplet energy gap: a unique approach to efficient photosensitizers with aggregation-induced emission (AIE) characteristics
The efficiency of the intersystem crossing process can be improved by reducing the energy gap between the singlet and triplet excited states (ΔEST), which offers the opportunity to improve the yield of the triplet excited state.
Aggregation-induced emission enhancement of a meso-trifluoromethyl BODIPY via J-aggregation
A CF3-BODIPY forms strongly luminescent aggregates, which contrasts with the quenched condensed-phase photophysics that are typical for BODIPY dyes. Examination of the luminescent properties of these aggregates – narrow red-shifted absorption and emission bands, minimal Stokes shift and increased fluorescence rate constants – and of the solid-state packing of the dye establish the CF3-BODIPY as the first structurally characterized genuine BODIPY J-aggregate.
What makes efficient circularly polarised luminescence in the condensed phase: aggregation-induced circular dichroism and light emission
A newly designed molecular system shows high CPL performance in the aggregate state: high emission efficiency, large dissymmetry factor, and good spectral stability.
Aggregation induced emission of a new naphthyridine-ethynyl–gold(I) complex as a potential tool for sensing guanosine nucleotides in aqueous media
A new organometallic alkynyl–gold(I) complex exhibiting aggregation induced emission is capable of sensing Guanosine nucleotides via complementary hydrogen bonding in aqueous media.
Polarized resonance synchronous spectroscopy as a powerful tool for studying the kinetics and optical properties of aggregation-induced emission
Light scattering and absorption both contribute to the UV-vis extinction quantified with a UV-vis spectrophotometer, but they differ drastically in their causes and effects.
Strategic modification of ligands for remarkable piezochromic luminescence (PCL) based on a neutral Ir(III) phosphor
A neutral Ir(III) complex has been synthesized by introducing a carboxyl group and fluorine substituents into the ligands to construct a new piezochromic luminescence (PCL) active material.
Polymorphism of derivatives of tert-butyl substituted acridan and perfluorobiphenyl as sky-blue OLED emitters exhibiting aggregation induced thermally activated delayed fluorescence
Blue multi-functional emitters with a perfluorobiphenyl moiety exhibiting polymorphism and changing emission colour.
A fluorescent turn-on probe for cyanide anion detection based on an AIE active cobalt(II) complex
A Co(II) complex based on an AIE-active tetraarylethylene ligand displays selective fluorescence enhancement in the presence of cyanide anion in aqueous solution.
Highly emissive poly(maleic anhydride-alt-vinyl pyrrolidone) with molecular weight-dependent and excitation-dependent fluorescence
Nonconventional poly(maleic anhydride-alt-vinyl pyrrolidone) copolymers exhibit distinct AIE characteristics, as well as molecular weight-dependent and excitation-dependent fluorescence. They can emit blue to red colours under different excitation wavelengths.
Molecular origin of photoluminescence of carbon dots: aggregation-induced orange-red emission
The molecular origin of the photoluminescence of carbon dots (CDs) is shown.
The effect of regioisomerism on the solid-state fluorescence of bis(piperidyl)anthracenes: structurally simple but bright AIE luminogens
Bis(piperidyl)anthracenes were developed as structurally simple, bright and colour tuneable AIE luminogens and their emission mechanisms were analysed.
Dual-emission fluorescent sensor based on AIE organic nanoparticles and Au nanoclusters for the detection of mercury and melamine
A dual-emission ratiometric fluorescent sensor based on AIE organic nanoparticles and Au NCs was prepared by electrostatic interaction. The probe can detect Hg2+ and melamine not only visually but quantitatively.
Mechanochromic luminescence of halide-substituted difluoroboron β-diketonate dyes
Halide-substituted difluoroboron β-diketonates were synthesized and display mechanochromic luminescence and quenching. Material structure is halide dependent and dynamic recovery properties for halide dyes are slower than for the hydrogen counterpart.
benzene molecule exhibits outstanding phosphorescence in rigid environments: from computational study to organic nanocrystals and OLED applications
The hexathio-benzene core molecule (right) shows outstanding phosphorescence as a powder (left) and has been used for luminescent organic nanocrystals and OLED.
Regulation of circular dichroism behavior and construction of tunable solid-state circularly polarized luminescence based on BINOL derivatives
Circular dichroism behavior was regulated by controlling the molecular conformation of BINOL derivatives, and tunable solid-state circularly polarized luminescence was achieved.
An o-phthalimide-based multistimuli-responsive aggregation-induced emission (AIE) system
An o-phthalimide-based AIE system was developed and used for detecting UV light, Hg(II) and pH, and as a photo-printing material.
Aggregation-induced emission-mediated spectral downconversion in luminescent solar concentrators
Two dyes showing aggregation induced emission behaviour were examined for use as a light harvesting Förster resonance energy transfer pair in luminescent solar concentrators.
Control of aggregation-induced emission versus fluorescence aggregation-caused quenching by bond existence at a single site in boron pyridinoiminate complexes
The control of luminescence properties between fluorescence aggregation-caused quenching and aggregation-induced emission with or without a chemical bond at a single site in boron complexes was accomplished.
Substituent effects on the aggregation-induced emission and two-photon absorption properties of triphenylamine–dibenzo[a,c]phenazine adducts
Non-substituted and alkyl-substituted triphenylamine–dibenzo[a,c]phenazine adducts (Q1–Q3) showed the combined features of ICT plus AEE, while the alkoxy-substituted Q4–Q5 exhibited obvious AIE effects.
Stimuli responsive furan and thiophene substituted difluoroboron β-diketonate materials
Changing the heteroatom from oxygen to sulfur in a luminescent difluoroboron β-diketonate converts a thermally responsive material into a mechano responsive dye system.
About this collection
Guest Edited by Fengyan Song, Bin Liu and Ben Zhong Tang, this virtual issue features a collection of the AIE papers published in a variety of RSC journals over the past 20 years involving working mechanisms of AIE, new AIE systems, and the exploration of their optical, electronic, magnetic, chemical, energy and biomedical applications. We hope this collection will attract a broad range of audiences to the area of AIE research.