Fluorophore branching boosted photo-induced energy transfer in UiO-66 for ultrasensitive and instant hydrazine sensing

Abstract

Metal organic frameworks (MOFs) have made great progresses in the field of fluorescent sensing, however, whether the electronic structure and the recognized sites could be adjusted by the external functionalization...

Enhancing Kinase Activity Detection with a Programmable Lanthanide Metal–Organic Framework via ATP-to-ADP Conversion

“…As seen in Figure D, the HOMO of TPTC is −6.82 eV, which is the closest to those of ATP (−6.59 eV) and ADP (−6.64 eV). This small energy level difference is most conducive to the effective photoinduced electron transfer (PET) process of ATP and ADP toward the ligand TPTC . The HOMO energy level difference between TPTC and ATP (ADP) is 0.22 eV (0.17 eV), and the 29.4% energy level difference of TPTC for ATP and ADP (much higher than those of other ligands) can effectively achieve differential amplification of sensing.…”

“…This small energy level difference is most conducive to the effective photoinduced electron transfer (PET) process of ATP and ADP toward the ligand TPTC. 42 The HOMO energy level difference between TPTC and ATP (ADP) is 0.22 eV (0.17 eV), and the 29.4% energy level difference of TPTC for ATP and ADP (much higher than those of other ligands) can effectively achieve differential amplification of sensing. This seems to explain why Eu-TPTC exhibits the strongest differential response to ATP and ADP.…”

“…When the ΔE ST energy level exceeds a specific threshold (5000 cm −1 ) and the ΔE TD energy level is lower than 3500 cm −1 , the ligand may possess superior energy transfer efficiency and potential luminescent properties, favoring the formation of dual-emitting Ln-MOFs. 42 Based on these criteria, TPTC is identified as the most promising candidate ligand for dual-emitting MOFs because it has both a relatively high ΔE ST and a relatively low ΔE TD . Moreover, TPTC shows the most significant difference in fluorescence response to ATP/ADP and the largest chromaticity shift value (Figures S7 and S8), which demonstrate its superior responsiveness during the ATP enzymatic hydrolysis process.…”

“…Additionally, according to Figures S4–S6 and Table S7, QPTC is excluded as a ligand for a dual-emitting MOF. When the Δ E ST energy level exceeds a specific threshold (5000 cm –1 ) and the Δ E TD energy level is lower than 3500 cm –1 , the ligand may possess superior energy transfer efficiency and potential luminescent properties, favoring the formation of dual-emitting Ln-MOFs . Based on these criteria, TPTC is identified as the most promising candidate ligand for dual-emitting MOFs because it has both a relatively high Δ E ST and a relatively low Δ E TD .…”

Exploration of the Capacity of a Superstable Eu-MOF for Visualized Identification of 1-HP and Trp in Fresh Human Urine

“…Metal–organic frameworks (MOFs) are a kind of rapidly emerging porous materials self-assembled by metal ions or metal clusters and organic linkers through coordination interactions equipped with numerous fascinating virtues, such as porosity, structural diversity, and modifiability. − On the other hand, rare-earth ions, such as Sm 3+ , Nd 3+ , Er 3+ , and especially Eu 3+ and Tb 3+ , feature the characteristic fluorescent emission, millisecond-class fluorescent lifetime, high quantum yield, etc. − Integrating the advantages of MOFs and rare-earth ions, metal–organic frameworks fabricated with rare-earth ions (Ln-MOFs) have attracted a large amounts of attention toward their potential application in chemical sensors for various ions, − diverse antibiotics, − amino acids, − and different biomarkers. − …”