Tuning Energy Transfer in <scp>Metal‐Organic</scp> Frameworks for Fluorescence Turn‐on Sensing of Hg(<scp>II</scp>) Ions<sup>†</sup>

Wang, Xuejiao; Mal, Arindam; Gui, Bo; Wang, Cheng

doi:10.1002/cjoc.202200690

Cited by 6 publications

(8 citation statements)

References 57 publications

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“…After excitation of the donor, there is intramolecular energy transfer to the emissive acceptor. The mechanism for energy transfer can be through space (Förster resonance energy transfer, FRET) , or through bonds (through-bond energy transfer, TBET). Unlike FRET, the TBET process does not require donor/acceptor spectral overlap, but efficient TBET dye cassettes must be conjugated in way that connects the π-electrons of the donor and acceptor components. − …”

Section: Introductionmentioning

confidence: 99%

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

Zhang,

Chasteen,

Smith

2024

J. Org. Chem.

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The chemosensor literature contains many reports of fluorescence sensing using polyaromatic hydrocarbon fluorophores such as pyrene, tetraphenylethylene, or polyaryl(ethynylene), where the fluorophore is excited with ultraviolet light (<400 nm) and emits in the visible region of 400−500 nm. There is a need for general methods that convert these "turn-on" hydrocarbon fluorescent sensors into ratiometric sensing paradigms. One simple strategy is to mix the responsive hydrocarbon sensor with a second non-responsive dye that is excited by ultraviolet light but emits at a distinctly longer wavelength and thus acts as a reference signal. Five new cyanine dye cassettes were created by covalently attaching a pyrene, tetraphenylethylene, or biphenyl(ethynylene) component as the ultraviolet-absorbing energy donor directly to the pentamethine chain of a deep-red cyanine (Cy5) energy acceptor. Fluorescence emission studies showed that these Cy5-cassettes exhibited large pseudo-Stokes shifts and high through-bond energy transfer efficiencies upon excitation with ultraviolet light. Practical potential was demonstrated with two examples of ratiometric fluorescence sensing using a single ultraviolet excitation wavelength. One example mixed a Cy5-cassette with a pyrene-based fluorescent indicator that responded to changes in Cu 2+ concentration, and the other example mixed a Cy5-cassette with the fluorescent pH sensing dye, pyranine.

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Section: Introductionmentioning

confidence: 99%

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

Zhang,

Chasteen,

Smith

2024

J. Org. Chem.

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“…These frameworks have increased attention because of their interesting chromic properties for photochromic and solvatochromic switching applications. − The highly ordered structure of MOFs provides an ideal concept for obtaining energy transfer with the required directional forces and distance . The geometrical arrangement of organic linkers in MOFs influences the energy transfer, which deviates from the Förster-type model. , Recent research has focused on tuning FRET in MOFs for amplified fluorescence sensing. , Another study provided new insights into the role of a 3D structure in energy transfer in mixed-ligand MOFs . These advances in research determine the potential of FRET in MOFs for various applications.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Optical Properties via Energy Transfer of Layered Biomaterial/Metal–Organic Framework Composites

Feria,

Lo,

Hsu

et al. 2024

J. Phys. Chem. C

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Metal−organic frameworks (MOFs) are intriguing materials with outstanding structural tunability and high surface areas, making them potentially suitable for different optoelectronic applications. However, they are also considered nanoporous materials, which can significantly influence their optical properties and applications. This work successfully investigates the photophysical properties of layer-by-layer (LbL) composites formed by a LbL structure of chicken albumen (egg white) with three distinct metal−organic frameworks (MOFs):Photoluminescence (PL) analysis demonstrated a 3-fold increase when chicken albumen was added to the MOF LbL composites compared to the pristine MOFs. Aside from the optical enhancements, a clear spectral overlap was measured from the PL and absorption spectra of albumen and the three MOFs, identifying a Forster-type resonance energy transfer (FRET). After carefully optimizing the stacking of albumen/MOF LbL composites, it revealed a broadband white light emission with a CIE index of (0.312, 0.366) and (0.303, 0.352). These results highlight the demonstration of energy transfer in biomaterial-MOF LbL composites for the in-depth study and capability for fabricating bioinspired white light emitters.

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“…On the contrary, fluorescence sensing method has the advantages of simple operation, high sensitivity, and good cost‐effectiveness, and it is prosperous used in the detection of metal ions, pesticides, and veterinary drugs (Khan et al, 2019; Moaddab & Ghasemi, 2021; Mondal et al, 2019; Yang et al, 2021). Most widely used fluorescent sensors for detecting Au 3+ or other metal ions include fluorescent metal nanoclusters (NCs; Song et al, 2019), organic dyes (Suna et al, 2022), semiconductor quantum dots (QDs; Zhu et al, 2017), fluorescent metal organic frameworks (MOFs; Wang et al, 2022), which may be restricted by their cytotoxicity, environmental unfriendly, high costs, and complex equipment and treatment processes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au³⁺

Zhang

Zhou

et al. 2023

J Food Process Engineering

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A new fluorescent probe based on phosphorus-doped cow milk-derived carbon quantum dots (P-CMCQDs) for the detection of Au 3+ was studied in water samples. P-CMCQDs were prepared by hydrothermal method with cow milk as carbon source and phosphoric acid as dopant. P-CMCQDs show green fluorescence under ultraviolet light and can be partially quenched by Au 3+ . However, the excellent fluorescence characteristics of P-CMCQDs-ascorbic acid (AA) were obtained and can be used to detect trace Au 3+ by simply mixing the P-CMCQDs with AA. The sensing mechanism is based on the reduction of Au 3+ to AuNPs by P-CMCQDs and AA, and then AuNPs induce the fluorescence quenching of P-CMCQDs through synergistic static quenching and internal filtering effect. The fluorescence intensity of P-CMCQDs-AA varies with the concentration of Au 3+ (10-140 μmol/L), the detection limit is 4.2 nmol/L, indicating that the P-CMCQD S -AA probe has excellent sensitivity. In the detection of Au 3+ in tap water and lake water, it is found that the recovery is between 99.6% and 100.5%, and the relative standard deviation is between 1.7% and 3.2%. This method is fast, efficient, and sensitive, and can be used to detect Au 3+ in actual water samples. Practical ApplicationsAlthough the element gold is chemically inert, soluble gold salts remaining in the environment in the form of ions are toxic and serious damage the peripheral nervous system, causing other health issues. Therefore, it seems necessary to design an efficient and sensitive method to detect Au 3+ in environment. Among many detection methods, fluorescence sensing method is more suitable for on-site, rapid detection.However, the complex system, high limit of detection and environmental pollution caused by metal luminescence limit its application. In this paper, the biomass P-CMCQDs was synthesized from cow milk by hydrothermal method. By adding AA in the synthesized P-CMCQDs, the limit of detection (LOD) was greatly improved, and the trace Au 3+ detection in tap water and lake water was highly selective and sensitive.

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Tuning Energy Transfer in Metal‐Organic Frameworks for Fluorescence Turn‐on Sensing of Hg(II) Ions^†

Cited by 6 publications

References 57 publications

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

Enhanced Optical Properties via Energy Transfer of Layered Biomaterial/Metal–Organic Framework Composites

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au³⁺

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Tuning Energy Transfer in Metal‐Organic Frameworks for Fluorescence Turn‐on Sensing of Hg(II) Ions†

Cited by 6 publications

References 57 publications

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

Enhanced Optical Properties via Energy Transfer of Layered Biomaterial/Metal–Organic Framework Composites

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au3+

Contact Info

Product

Resources

About

Tuning Energy Transfer in Metal‐Organic Frameworks for Fluorescence Turn‐on Sensing of Hg(II) Ions^†

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au³⁺