Application of a novel hydroxyl functionalized fluorescent covalent organic framework for turn-off ultrasensitive Zn²⁺ ion detection

Abstract

In this research, a novel hydroxyl functionalized covalent organic framework (COF) with fluorescent properties was rationally designed based on the reaction between 2,5-dihydroxy-terephthalic-dihydrazide (DHTPz) and 1,3,5-benzenetricarboxaldehyde (Bt) for the Zn2+...

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

“…Examining its luminescence and quenching in different solvents, it is observed that GC-TFPB-AO shows peak fluorescence emission at 400–600 nm when irradiated at 370 nm, with the most significant degree of fluorescence quenching observed in polar DMF (Figures a and S5). Therefore, we chose DMF as the dispersant in further experiments. The sensitivity of GC-TFPB-AO toward UO 2 2+ was further improved by modification with an AO group (Figure S6).…”

A Nanounit Strategy Disrupts Energy Metabolism and Alleviates Immunosuppression for Cancer Therapy

“…The size increase may be attributed to the coordination between encapsulated payloads and Zn 2+ ions . It has been reported that Zn 2+ can not only coordinate with nitrogen atoms in the quinoline/pyrazoles structure of BAY-876 and CQ but also form a stable complex with the oxygen atoms in hydroxyl groups of 2-DG. − Therefore, BAY-876, CQ, and 2-DG will participate in the formation of ZIF-8, resulting in a larger particle size. The Fourier-transform infrared spectroscopy (FT-IR) spectrum of D/B/CQ@ZIF-8@CS displayed the strong absorption peak corresponding to the stretching vibration of C–O bond in the sugar ring of CS (1061 cm –1 ) (Figure g).…”