Stable and highly luminescent CsPbX3 (X= Br, Br/Cl) perovskite quantum dot embedded into Zinc(II) imidazole-4,5-dicarboxylate metal organic framework as a luminescent probe for metal ion detection

Boosting Artificial Photosynthesis: CO2 Chemisorption and S-Scheme Charge Separation via Anchoring Inorganic QDs on COFs

“…The chemical composition and elemental valence states of the obtained samples were analyzed using X-ray photoelectron spectroscopy (XPS) and all of the binding energies (BEs) were referenced to the C 1s peak at 284.8 eV from adventitious carbon (Figure S3). The N 1s spectrum of the pristine COF (Figure a) exhibits two discernible peaks centered at 398.5 and 399.8 eV, corresponding to CN and C–N functionalities within the COF, respectively. , Intriguingly, a new signal emerges at ∼401.6 eV in the COF/QDs-II composite, signifying the presence of organic residues from the QDs (Figure S4) and providing compelling evidence of the coupling between COF and QDs. − The Cs 3d XPS spectra (Figure b) display two distinct peaks at 724.2 and 738.1 eV, associated with Cs 3d 5/2 and Cs 3d 3/2 , respectively. The BEs of Pb 4f 7/2 and Pb 4f 5/2 in the bare QDs are observed at 138.1 and 143.0 eV, respectively (Figure c).…”

CsPbBr3 perovskite quantum dot decorated ZIF-8 MOF: a selective dual recognition fluorometric visual probe for 4-nitroaniline and rhodamine blue

“…RhB's existence caused the composite's lifetime to decrease to 20.9 ns (Table 3), providing clear proof of energy transfer between the donor CPB perovskite and acceptor RhB dye molecules. Using the following eqn (1), 21,36 the FRET efficiency ( η ) was calculated to be 48.06% with 5 ppm RhB aqueous solution. τ DA and τ D represent the lifetime of CPB@ZIF-8 in the presence and absence of RhB, respectively.…”

“…Incorporation of PeQDs into the porous MOF host matrix is an effective strategy to improve the stability of these nanocrystals. [20][21][22] A subclass of microporous MOFs called a zeolitic imidazolate framework (ZIF-8), which has excellent chemical and thermal stability as well as good dispersibility, is a suitable platform for the growth of various nanoparticles. 23,24 Here, in this work CsPbBr 3 (CPB) PeQDs are introduced into the ZIF-8 MOF matrix to produce a MOF-perovskite host-guest complex using an in situ, one-step technique, and established its excellent stability in aqueous and other polar solvents for the detection of organic pollutant dye molecules and NACs.…”

Sensing Utilities of Cesium Lead Halide Perovskites and Composites: A Comprehensive Review

“…However, it can be improved further by supporting additional real-time applications. Ahmed et al proposed a two-step surfactant-free procedure for producing a CsPbBr 3 QD-embedded zinc(II) imidazole-4,5-dicarboxylate metal–organic framework (MOF) for the luminescent detection of Cu 2+ [ 91 ]. The PL emission of CsPbBr 3 @MOF composites at 519 nm (under 360 nm excitation; PLQY = 39.2%) was quenched linearly between 100 and 600 nM, with an estimated LOD of 63 nM.…”