Metal–Organic Frameworks (MOFs)-Based Sensors for the Detection of Heavy Metals: A Review

A Soluble Porous Coordination Polymer for Fluorescence Sensing of Explosives and Toxic Anions under Homogeneous Environment

“…This measurement indicates the energy transfer happens between TNP and Zn-PCP, which further contributes to quenching of the fluorescence with more sensitive detecting performance to TNP than that of other explosives ( Figure S14 ). As the Cr 6+ metal ion owns unfulfilled d configuration, both CrO 4 2− and Cr 2 O 7 2− anions have strong electron-withdrawing ability as that happening in sensing explosive molecules [ 60 , 61 , 62 , 63 ]. The electrons of Zn-PCP excited by photons could be transferred to the anions resulting in a decrease of fluorescence intensity.…”

“…Both the sensitive behaviors and the sensing accuracy demonstrate the advantages of using soluble PCP as a fluorescence sensor in probing dangerous and toxic species under a homogeneous environment. 2− anions have strong electron-withdrawing ability as that happening in sensing explosive molecules [60][61][62][63]. The electrons of Zn-PCP excited by photons could be transferred to the anions resulting in a decrease of fluorescence intensity.…”

A self-assembled metal–organic framework for enhanced UO22+ fluorescence sensing: integration of an octa-nuclear zinc cluster with hexakis(4-carboxyphenoxy)cyclotriphosphazene

“…In addition, by precisely modulating the composition and coordination environment of the metal cluster nodes, it is possible to design clusterbased LMOFs that exhibit recognition capabilities for specific analytes. [37][38][39][40] This design flexibility is an important reason why metal cluster-based LMOFs have a wide range of potential application in the field of fluorescence sensing. However, how to precisely design and synthesize metal cluster-based MOFs with specific connectivity patterns and fluorescence properties to achieve selective recognition of target substrates is still a great challenge in synthetic chemistry.…”

Copper(ii)-MOFs for bio-applications

“…Biosensors are devices that detect and convert a biological signal into an electrical or optical signal that can be measured and analysed. 13 These devices can be used to measure the presence or amount of specific biological substances, such as proteins, enzymes, bacteria, or viruses. 15,23 Biosensors are used in a wide variety of applications, from disease detection to quality control in food and beverage production.…”

“…11,12 However, in biomedicine and environmental control, it has been reported that copper ions can act as enzymatic active centres and it can interact in a specific way with proteins and enzymes, which makes them ideal for the detection of specific biomolecules, and thus the application of biosensors from these materials emerges. 13 In addition, copper MOFs also have a high surface area and adsorption capacity, which provides the promise of using them as modified drug delivery systems under a wide variety of conditions. 14…”