fig4

Figure 4. Partial conversion process among FM-MOFs: (A) scheme illustration of constructing MTV-MOF through a partial conversion process; (B) constructing FM-MOF-1-4 from FM-MOF-1; (C) ¹H NMR spectra of (A) FM-MOF-1-4, (B) FM-MOF-1, and (C) FM-MOF-4 in D₂O/KOH solution; (D) effect on the emission spectra of FM-MOF-1-4 with different concentration of Hg²⁺ in aqueous solution; and (E) Stern-Volmer plots of Hg²⁺ in aqueous solution for FM-MOF-1-4 (red) and FM-MOF-4 (blue).