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Metal-organic frameworks are a class of attractive materials for fluorescent sensing. Here, we report the exploration of fluorescent Zn-based amine/azine-functionalized MOF, TMU-17-NH2, ([Zn(NH2-BDC)(4-bpdb)].2DMF; NH2-BDC = amino-1,4-benzenedicarboxylic acid, 4-bpdb = 1,4-bis(4-pyridyl)-2,3-diaza-2,3-butadiene) for highly selective and sensitive detection of Fe 3+ in DMF solution. TMU-17-NH2 shows fast recognition of Fe 3+ ion with a response time of <1 min and detection limit of 0.7 µM (40 ppb), and the luminescence is completely quenched in 10 -3 M DMF solution of Fe 3+ . Furthermore, no interferences from 250 μM As 3+ , Cd 2+ , Zn 2+ , Co 3+ , Ni 2+ , Cu 2+ , Pb 2+ , Mn 2+ and Al 3+ were found for the detection of Fe 3+ , which suggests that the functionalized TMU-17-NH2 is a promising luminescent probe for selectively sensing iron ions.

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