Metal–organic frameworks (MOFs)-based
sensors for monitoring
toxic substances in wastewater have attracted great attention due
to the efficient and reliable performance. Here, we has synthesized
two novel zinc-based MOFs [Zn(ttb)2(H2O)2]n (Zn1-ttb) and
{[Zn(ttb)2]·0.5CH3CN}n (Zn2-ttb) through changing the polarity of reaction
solvents and finally obtained target 2D MOF material [Zn(ttb)(bdc)0.5]n(Zn3-ttb-bdc)
by successfully introducing an ancillary ligand H2bdc (Httb
= 1-(triazo-1-ly)-4-(tetrazol-5-ylmethyl)benzene, H2bdc
= 1,4-benzenedicarboxylic acid). As-prepared Zn3-ttb-bdc exhibits high water and chemical stability as well as excellent
fluorescence property. Due to the −COOH binding sites from
H2bdc, Zn3-ttb-bdc shows high sensitivity
and a rapid luminescent response to a representative organic micropollutant
trinitrophenol (TNP) and inorganic pollutants (Fe3+ and
Cr2O72–) in wastewater. The
mechanisms of multifunctional detection abilities of Zn3-ttb-bdc toward different types of pollutants are further studied. This work
presents the structural design in preparing MOF materials for multifunctional
detection performance, thus opening new perspectives for emerging
MOF-based sensors as environmental monitors.