A pyrene based amphiphilic receptor has been utilized in the nanomolar detection of uric acid at physiological pH water. The compound shows a unique concentration-dependent modulation optical response toward acid. In intramolecular/static excimer form (low concentration range), it displays ratiometric response, while "turn-off" sensing is observed specifically presence intermolecular/dynamic (high range). present protocol then employed for estimation blood serum samples healthy individuals....

The reversible self-assembly of amphiphilic probes with heparin as the stimulus for screening heparinase I enzyme is reported.

Herein, we report the formation of a highly luminescent, pH-sensitive, thermoreversible nanoaggregate in pure aqueous medium through self-agglomeration carbazole-based amphiphiles. The self-assembly process restricted intramolecular motion molecules and induced change its emission signal from blue to cyan, owing an aggregation-induced (AIE) effect. A similar type ratiometric response was also observed presence human serum albumin (HSA). However, this case, molecular flexible fluorescent...

Membrane-driven self-assembly of an amphiphilic pyrene–terpyridine probe efficiently reports on vesicle–micelle transition through ratiometric changes.

Easily synthesizable amphiphilic probes have been designed for the detection of Al³⁺ exclusively at mesoscopic interfaces.

Excitation-dependent tuning of the emission behavior fluorescent organic nanoparticles (FONs) with two simple luminescent pyrenyl-pyridyl conjugates as model systems is demonstrated. In case compound a flexible bis-picolyl moiety, simultaneous presence multiple ground-state species distinct absorption and characteristics can be observed. The relative ratios these easily modulated, it possible to selectively stimulate any one them individually by choosing an appropriate excitation channel....

Excitation triggered alteration in the sensing behavior of fluorescent nanoaggregates was explored water, considering caffeine as "target analyte". Merely by changing excitation wavelength, we could specifically excite either monomeric species or nanoaggregates. The monomer showed highly sensitive interaction with despite poor selectivity, while "strongly associated" displayed relatively high selectivity low sensitivity. In addition, extent self-aggregation also found to be influenced...

An iron-responsive optical probe has been developed for simultaneous sensing of both ferritin and apoferritin proteins at pH 7.4 in water.

Environmental pollution induced by toxic metal ions and harmful chemicals mainly from industrial waste poses a significant threat which urges for their rapid detection before release into the ecosystem above permissible level. Optical sensors are inexpensive, simple, yet efficient in sensing such toxicants. Herein, we show that structurally simple π-conjugated pyridine-end p-phenylenevinylene oligomers can selectively sense anions solution, supramolecular gels, as well solid support....

An easy to synthesize luminescent, amphiphilic probe has been designed for the first time in optical sensing of a biopesticide, Helicoverpa armigera nuclear polyhedrosis virus (HaNPV). The compound showed formation pH-sensitive, thermoreversible nanoaggregate aqueous medium. addition HaNPV resulted rapid change emission color from blue cyan at pH 7.4. Till date, no assay is known literature, which can achieve fast, on-field detection as low ∼103 POBs/mL. Most importantly, because naked-eye...

Abstract Multiresponsive smart optical probe based on p‐phenylene vinylene backbone is designed for simultaneous sensing of multiple ions, such as Cu 2+ , Zn and F − at pH 7.4. A rapid color change from colorless to deep yellow observed upon addition both ion. However, under long UV lamp, the green‐colored emission specifically quenched in presence while induces green yellow. On contrary, unlike does not render any visible color, however, an quenching, similar that addition, was noticed. The...

Despite decades-long extensive research, probes that provide a comprehensive description of the lipid membrane microenvironment are still lacking. Here, "smart" pyrene-terpyridine probe for multiparametric sensing membranes is reported. The complexity associated local can be described by distinct features fluorescence. self-assembly molecules in phospholipid bilayers was sensitive to order and phase state. self-assembled showed unique emission, influenced dye-dye interactions excited-state...

A luminescent ruthenium(II) polypyridyl complex has been designed for ratiometric optical sensing of Spodoptera litura nuclear polyhedrosis virus (SLNPV) both in aqueous medium and commercial samples. The detailed spectroscopic studies indicate that the can electrostatically bind to negatively charged outer protein (polyhedron) layer SLNPV renders a change luminescence color from red (λem ∼ 605 nm) blue 487 nm). linear variation (ratiometric response) over wide concentration range occlusion...

Abstract Stimuli‐responsive materials based on π‐conjugated donor‐acceptor systems have great potential for sensing applications in solution and solid state. The photophysical properties of an oligo(p‐phenylenevinylene) series consisting five push‐pull type molecules were systematically investigated to switch their absorption emission by using trifluoroacetic acid as a specific external analyte. During the trifluoracetic sensing, terminal pyridine units undergo protonation lead broader band...