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. 2015 Nov 6;5:15987. doi: 10.1038/srep15987

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(a) ¹H NMR spectra of TPE-S (in acetone-d₆) before and after the addition of Hg²⁺ ions, and TPE-O in chloroform-d. The solvent peak is marked with asterisk. (b) ¹H NMR spectra of TPE-O (in acetonitrile-d₃) before and after the addition of t-BuOK. Inset: Photographs of TPE-O before and after the addition of t-BuOK.