Constructing polycyclic aromatics-based, highly emissive fluorophores with good solubility and tunable aggregated structures properties is of great importance for film fabrication, solution processing, relevant functionality studies. Herein, we describe a general strategy to endow conventional organic enhanced modulated fluorescent via their incorporation into coordination-driven self-assembled metallacycles. A widely used fluorophore, pyrene, was decorated two pyridyl groups yield...

Good dispersion and alignment of multiwalled carbon nanotubes (MWCNTs) in cellulose is achieved by dissolution an ionic liquid subsequent grinding spinning. This simple method preparing regenerated-cellulose/MWCNT composite fibers could lead to the production from a renewable resource (cellulose). The figure shows regenerated (white) cellulose/MWCNT (black) fibers. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c0442_s.pdf or...

Sensitive and rapid identification of illicit drugs in a non-contact mode remains challenge for years. Here we report three film-based fluorescent sensors showing unprecedented sensitivity, selectivity, response speed to the existence six widely abused drugs, including methamphetamine (MAPA), ecstasy, magu, caffeine, phenobarbital (PB), ketamine vapor phase. Importantly, these sensing can be successfully performed after 5.0 × 105, 4.0 2.0 1.0 104, 102 times dilution their saturated with air...

Poor processability of fullerenes is a major remaining drawback for them to be studied monomolecularly and find real-life applications. One the strategies tackle this problem encapsulate within host, which however quite often, accompanied by significant alteration their physical/chemical properties as encountered in chemical modification. To minimize effect, an electron-deficient entities-based, dissolvable, fluorescence active supramolecular host was designed constructed via...

Abstract New strategies are in high demand for fast, sensitive, selective, on‐site and real‐time detection of the important but challenging alkane vapors owing to their opto‐electronic inertness. Herein, we report, first time, a high‐performance fluorescent film sensor (FFS) alkanes with rationally designed through‐space charge transfer (TSCT) molecule as sensing fluorophore. Steady‐state fluorescence, femto‐second transient absorption spectroscopy theoretical studies revealed continuous...

Abstract Smart luminescent materials with tangible and reversible responses to external stimuli have gained popularity for multiple applications. However, impracticable less adaptability render them unfit real‐life Here, a proton competitive binding‐based molecular system is reported, which demonstrates, both in solution solid state, remarkable toward light illumination temperature variation. Small change solvent composition could result variation measurable range at least from −80 60 °C....

Reliable and nondestructive monitoring of food quality is great importance in sustaining life promoting good health. Herein, we developed sensitive, fast, reversible, nanometer-thick fluorescent films for the evaluation fish freshness. The nanofilms were prepared via dynamic condensation tetraphenylethylene derivative (TPEBA) with Calix[4]pyrrole (CPTH) at humid air/DMSO interface. amorphous nanofilm uniform thickness range 12∼58 nm. Owing to aggregation-induced emission (AIE) property...

Room-temperature phosphorescence materials have found important applications in dissolved oxygen sensing, temperature monitoring, anticounterfeiting, etc., because of their prolonged lifetime. However, the known systems mainly utilize triplet local excited state emission, which is generally less sensitive to microenvironment perturbation. In this work, we designed a series 4-phenyl-1,8-naphthalimide (NMI) derivatives containing different numbers carbazole (Cz) units (denoted as NMI-Cz,...

BTEX (benzene, toluene, ethylbenzene, o-xylene, m-xylene, and p-xylene) represents a group of volatile organic compounds (VOCs) constitutes great threat to human health. However, sensitive, selective, speedy detection them on-site in the vapor phase remains challenge for years. Herein, we report film-based fluorescent approach conceptual sensor, which shows unprecedented sensitivity, speed, reversibility aromatic hydrocarbons phase. In studies, pentiptycene was employed produce nonplanar...

A reversible mechanochromic luminescent material based on a simple tetrahedral monoboron complex (B-1) is described. Interestingly, in addition to amorphous powders (P), the compound could exist three unique crystal states (A, B, and C), showing efficient green-to-red colors, which result of wane wax dual emissions compound. Surprisingly, one increases significantly with increasing temperature, fully offsetting quenching effect temperature-assisted internal conversion process. The four are...

Abstract Designing novel fluorophores with nonplanar structure and environmental sensitivity is of great significance for the development high‐performance film‐based fluorescent sensors. Herein, a unique pentiptycene (P) perylene bisimide (PBI)‐contained dyad (P‐PBI‐P) displaying switchable tunable charge separated state reported. It demonstrated that this symmetrical dumbbell‐like molecular shows greater extent photoinduced intramolecular electron transfer than asymmetrical dyad, P‐PBI. In...

Film-based fluorescence sensing is recognized as one of the most optimized techniques for trace analysis chemicals in air after invention ion mobility spectrometry. The performance technique highly dependent on design film. This paper reports a new fluorescent film which shows unprecedented and discriminative to presence phenol, o-cresol, m-cresol, p-cresol with an ultralow detection limit low 0.4, 0.3, 10, 0.8 ppt, respectively. was designed via combination advantages aggregation-induced...

Abstract In situ, online, fast, and sensitive detection discrimination of explosives, illicit drugs, volatile organic compounds via vapor sampling is a challenge for many years. The highly efficient noncontact 15 types chemicals mentioned above using film‐based fluorescent sensor array reported herein. Importantly, the presence water, toiletries, fruit, dirty clothes, other interferences has little effect upon detection. Discrimination controlled realized pattern recognition strategy....

Development of high-performance, low-power-consumption, small-sized detectors is a key issue for fabricating specific miniaturized chromatographs (GCs). Herein, we report, the first-time, utilization film-based fluorescent sensor as GC detector. In studies, designed new o-carborane derivative known cyclometalated alkynyl-gold(III) complex, Au-CB. Unlike parent gold(III) newly synthesized Au-CB depicted remarkable aggregation-induced emission (AIE) property, enabling fabrication film. The...

Open AccessCCS ChemistryRESEARCH ARTICLES4 Dec 2023Bi-ortho-Carborane Unit-Riveted Perylene Monoimides: Structure-Tuned Optical Switches for Electron Transfer and Robust Thin Film-Based Fluorescence Sensors Nannan Ding†, Yu-Chan Liao†, Gang Wang, Kai-Hsin Chang, Zhaolong Ke Liu, Jiani Ma, Pi-Tai Chou Yu Fang Ding† Key Laboratory of Applied Surface Colloid Chemistry Ministry Education, School Chemical Engineering, Shaanxi Normal University, Shaanxi, Xi'an 710019 , Liao† Department Chemistry,...

Colloidal quantum dots (QDs) are excellent luminescent materials, but their short exciton lifetime, typically in the nanosecond range, restricts applications photochemical reactions. By designing QD-molecule conjugates, energy can be cycled between QD state and molecular triplet through transfer, thereby prolonging lifetime to hundreds of microseconds, which is similar mechanism thermally activated delayed fluorescence molecules. Currently, QD-molecule-based photoluminescence (TADPL) systems...

Chemical clustering of a nonemissive and non-AIEgen Cb-Ph endowed molecular system (Ad-4CP) with unique dual emissions in the solution state, typical clustering-triggered emission (CTE), high efficiency aggregated an aggregation-induced (AIE). The CTE was ascribed to intramolecular charge transfer (CT); however, AIE both intra- intermolecular CTs. two-level CTs make Ad-4CP exhibit remarkable excitation-dependent emissions. We believe that present work not only delivers peculiar properties...

Intramolecular charge transfer and excited-state symmetry breaking have a significant effect on the nonlinear optical properties of multipolar chromophores. Rigid nonplanar perylene bisimide derivatives (PBIs) functionalized at bay positions were comparatively comprehensively investigated. In apolar solvents, two quadrupolar molecular rotors showed an obvious decrease A0-0/A0-1 ratios, suggesting strong exciton coupling with adjacent PBI units initiated by π-π stacking. The vanishment...