Mixed-Valent Stellated Cuboctahedral Cu(2,4-Imdb)-MOF for Trace Water Detection

Abstract

Developing an economical and robust sensor using an earth-abundant metal-based metal–organic framework (MOF) to detect trace water content rapidly is crucial for laboratories and chemical industries. Herein, a mixed-valent chiral [{Cu+Cu3 2+(2,4-Imdb)3(H2O)3}·Cl]∞ MOF manifests atypical quantitative detection of a trace amount of water [0.016% (v/v)] in organic solvents. Single-crystal X-ray diffraction and time-correlated single-photon counting supported the mechanism for turn-on fluorescence.

A two-dimensional cadmium-based metal–organic framework as an excellent probe: highly selective luminescent “turn on” detection of tetrahydrofuran and quantitative analysis of water

“…In addition, we also analyzed the sensing mechanism of Cd-MOF towards THF from two aspects: structural change and the interaction between framework and guest molecules. 6,8 First, PXRD was utilized to study the crystal structure of the Cd-MOF. After being soaked in THF for 12 h, the sharp diffraction peaks are retained, and the peak positions are consistent with those of original Cd-MOF (Fig.…”

“…On the other hand, water is one of the most common impurities in THF, which is negative in many chemical reactions and product performances. 8 For this problem, developing a fast and economical manner for analyzing the water content of THF is very important for its applications. However, the functional materials detecting water in THF and THF simultaneously have been rarely reported.…”

Luminescence turn-on sensor for the selective detection of trace water and methanol based on a Zn(ii) coordination polymer with 2,5-dihydroxyterephthalate

“…14,15 Nowadays, water is considered a contaminant and impurity in dry organic products, food inspection, environmental monitoring, and pharmaceutical manufacturing. [16][17][18][19][20] Trace water inuences not only the yield of chemicals and drugs but also their activity and application. 21 Up until now, the traditional Karl Fischer titration method and gas chromatography have been used for monitoring water, but these methods have certain limitations, involving the requirements of specialized instruments, well-trained personnel, and time-consuming processes.…”

Anion Dependent Coordination Polymers of Different Copper Salts with Mixed Organic Ligands (bis(4‐Nitrophenyl)phosphoric Acid and 4,4′‐Bipyridine)

“…For example, benzene pentacarboxylic acid, 4,4'-bipyridine and copper nitrate, yield a complex with the composition [{Cu-(H 2 O) 3 } • {Cu 0.5 (bpy) 0.5 (H 2 O) 0.5 } 2 (μ-BPCH)], in which Cu(II) shows two different coordination environments (square pyramid and octahedron) as illustrated in Figure 1. [10] In fact, mixed valence Cu(I)/Cu(II) MOF networks play a significant role in enhancing the MOF properties like microporosity, [11] dimensional variability, [12] sensing, [13] photocatalytic [14] and electrocatalytic properties. [15] Also, Cu(II) mediated polymers are well known as colour intensity regulators in the dying industry.…”