Can conformational flexibility influence the self-assembly behavior and sensing efficacy of fluorogenic amphiphiles? A case study with bisbenzimidazole-based probes.

In this work, we have explored the metal ion sensing properties of two bisbenzimidazole-based fluorescent probes, that differ in their conformational flexibility, in an aqueous medium. The compound with a flexible methyl spacer (1) experienced blue shifts in its absorption and emission maxima (along with a turn-off response) upon the addition of Hg ions. On the contrary, the compound with a relatively rigid structure (2) showed red shifts in both its absorption and emission maxima (along with a turn-off response) when treated with Hg under similar conditions.

Modulation in the charge transfer characteristics of flexible bis-benzimidazole probes: independent sensing mechanisms for Hg and F.

Flexible bis-benzimidazole-based V-shaped amphiphilic probes (1 and 2) that form a fluorescent nanoscopic assembly in aqueous media have been designed. The ion-binding properties of compound 1 are investigated in both polar protic (water) and aprotic (acetonitrile) solvents. In acetonitrile, the compound shows a distinct chromogenic response towards Hg (LOD: 8.

Engaging a highly fluorescent conjugated polymer network for probing endogenous hypochlorite in macrophage cells: improved sensitivity signal amplification.

We have employed a triazine-based conjugated polymer network (CPN) for the selective detection of hypochlorite in a semi-aqueous environment. CPNs have been widely employed in gas capture, separation, and adsorption, but the fluorescent properties of CPNs possessing extensive π-conjugated systems tend to be unexplored. Herein, we report the photophysical properties of the CPN and investigate its sensing capability towards hypochlorite.

Tuning Fluorescence Properties of BIM Probes via Clay Integration: Targeting Rifampicin with improved selectivity.

The incorporation of photoactive organic dyes into layered inorganic materials enhances their optical and chemical properties, making them ideal for sensing applications. In this study, Bisindolyl methane (BIM)-based neutral probes were integrated with bentonite clay to explore their sensing capabilities. Probe 1 (unoxidized BIM) and Probe 2 (oxidized BIM) generally exhibited quenched luminescence in solution due to intramolecular rotations.

Preeminent designing of complementary TRANSFER and COMPLEMENT alongside excitation modulated molecular logic systems.

This article describes an optically adjustable, dual complementary molecular TRANSFER and COMPLEMENT logic gate as well as an extremely rare design of excitation-modulated logic systems using a pyrene coupled bis(indolyl)methane derivative (1) in Brij-58 micelles, triggered by different chemical stimuli. We have looked into the optical response of the probe molecule towards variety of analytes, including OH, CN, Hg, EDTA ., at various excitation channels, in order to achieve this goal.