A novel pyrene‐functionalized thiophene compound (Thi‐Pyr) and pyrene‐functionalized styrene polymers (P7–9) are synthesized via 1,3‐dipolar cycloaddition reaction between the azide functional groups of the precursors and 1‐ethynylpyrene. Glass transition temperature of the styrene polymers increases remarkably upon the covalent attachment of the pyrene unit through triazole linkers, whereas the thermal stabilities of the styrene polymers are not affected by the incorporation of pyrene moieties. Thi‐Pyr exhibits the characteristic pyrene monomer emission bands; on the other hand, P7–9 show the excimer emission bands of pyrene due to the excitation of ground state dimeric species. The monomer emissions of Thi‐Pyr and the excimer emissions of P7–9 are distinguishably increased by the addition of HP2O73−, Cl−, and Br− anions. The responses of Thi‐Pyr and P7–9 to the addition of HP2O73− are stronger than any other anions, indicating their selectivity to HP2O73− anion to some extent.
Front Cover: Novel, pyrene‐functionalized styrene polymers (P7–9) and thiophene compound (Thi‐Pyr) are prepared via click‐chemistry techniques. Under UV light, the compounds fluoresce with blue and greenish‐blue light respectively, with Thi‐Pyr exhibiting the characteristic pyrene monomer emission bands, while P7–9 show the excimer emission bands of pyrene due to the excitation of ground state dimeric species. These compounds are employed as optical chemical probes for qualitative ion sensing via fluorescence spectroscopy. Further details can be found in the article by O. Karagollu, M. Gorur, F. Gode,* B. Sennik, and F. Yilmaz* on page 939.
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