This communication describes an infinite 1D ribbon metal−organic framework (MOF) that crystallizes to produce large channels (13.4 × 17.5 Å) and exhibits strong aggregation enhanced fluorescence emission. The network is composed of tetrapyridine tetraphenylethene molecules coordinating to ZnCl 2 nodes. When activated, the network exhibits enhanced turn-on fluorescence in response to methyl-substituted volatile organic compounds (VOCs) and quenching in response to nitro-substituted VOCs. This MOF shows potential as a valuable sensor due to its high surface area, highly fluorescent TPE moiety, and significant response to VOCs.

The fabrication of a nanostructured CuTCNQF4 organic charge transfer complex on copper foil by employing a facile redox reaction in acetonitrile and its ability to promote catalytic reduction of toxic Cr6+ to its non-toxic Cr3+ counterpart.

Supramolecular self-assembly and self-organization are simple and convenient ways to design and create controlled assemblies with organic molecules, and they have provoked great interest due to their potential applications in various fields, such as electronics, photonics, and light-energy conversion. Herein, we describe the synthesis of two π-conjugated porphyrin molecules bearing tetraphenylethene moieties with high fluorescence quantum yield. Photophysical and electrochemical studies were conducted to understand the physical and redox properties of these new materials, respectively. Furthermore, these derivatives were used to investigate self-assembly via the solvophobic effect. The self-assembled aggregation was performed in nonpolar and polar organic solvents and forms nanospheres and ring-like nanostructures, respectively. The solution based aggregation was studied by means of UV-vis absorption, emission, XRD, and DLS analyses. Self-assembled ring-shape structures were visualized by SEM and TEM imaging. This ring-shape morphology of nanosized macromolecules might be a good candidate for the creation of artificial light-harvesting nanodevices.

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A pyridyl functionalised tetraphenylethylene (Py-TPE) for ratiometric fluorescent detection of intracellular pH values is reported. The Py-TPE fluorescent probe can be used for H + sensing in organic solvents (CHCl 3 , DMF and MeOH) and the change in optical density through absorption, emission and naked eye detection was modulated. On addition of TFA, an aggregation-induced enhancement of emission with an increase in quantum yield of 0.11 to 0.63, due to an intramolecular charge transfer (ICT) process was observed. This process is reversed by addition of TEA resulting in a cycle that can be repeated several times.