In this study, organic-inorganic hybrid mesogens of silver nanoparticles (Ag NPs) and azopyridines (AzoPys) enabled by halogen bonding were prepared. Triple functions of the degree of orientation change, metal-enhanced fluorescence, and surface-enhanced Raman scattering were observed in Ag⋯Br-Br⋯AzoPy nanoparticles (12Br-Ag), which were induced by the synthesis of Ag NPs in AzoPy. The bromine molecules were then linked by halogen bonding and electrostatic interaction resulting in the smectic A phase of 12Br-Ag. To demonstrate the potential of Br-Br⋯AzoPy (12Br) as a practical sensor, we used the 12Br compound to detect silver in an aqueous condition, and significant signals of the halogen-bonded complex-silver system were observed in the X-ray diffraction pattern and Raman spectra. Herein, we provide a novel perspective and design principle for the practical applications of organic-inorganic hybrid liquid crystals in environmental monitoring.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056922 | PMC |
| http://dx.doi.org/10.1039/d0ra06838a | DOI Listing |
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