New Microporous Metal−Organic Framework Demonstrating Unique Selectivity for Detection of High Explosives and Aromatic Compounds

Abstract

A highly luminescent three-dimensional microporous metal-organic framework, [Zn(2)(oba)(2)(bpy)]·DMA, demonstrates unique selectivity for the detection of high explosives and other aromatics via a fluorescence quenching and enhancement mechanism.

Fast and Reversible Detection of Nitrobenzene Vapour by a Fluorescent Metal–Organic Framework Templated by Ionic Liquid

“…MOFs constructed from d 10 metal ions with highly localized electronic states are often characterized by narrow energy bands. Therefore, they can be regarded as giant ''molecules'' and the valence-band (VB) and conductionband (CB) energy levels can be described in a fashion similar to that used for molecular orbitals (MOs) [13,14,16]. In general, the lowest unoccupied MOs (LUMOs) of nitroaromatic explosives are low-lying p*-type orbitals stabilized by the NO 2 group through conjugation, and their energy is below the CB of 1.…”

“…A large number of fluorescent materials including conjugated polymers [8,9], nanoparticles [10][11][12] and metal-organic frameworks (MOFs) [1][2][3][4][5][6] have been employed for explosive detection. Vapour phase detection of nitroaromatic explosives by fluorescence quenching methods employing the thin film of MOFs has been proven to be very effective [13][14][15][16][17][18][19]. Among various nitroaromatics, NB is the simplest and basic constituent of explosives.…”

Fluorescence Detection of Anilines and Photocatalytic Degradation of Rhodamine B by a Multifunctional Metal–Organic Framework

“…[12,13] Such interactions lead to effective charge transfer or energy transfer processes between the analytes and the MOFs. Correspondingly, this triggers a fluorescence response upon interaction, such as a variation in emission intensity or wavelength.…”

One-Dimensional Polymers Constructed with Paddle-Wheel Dinuclear Copper(II) Bridged by 4,4′-Bipyridine

“…The ligand 4,4 0 -bipyridine is an ideal connector between the transition metal atoms for the propagation of coordination networks due to the following features: it has two potential binding sites which are arranged in a divergent (exo) fashion; has a rigid structure which will help in the predictability of the network geometries; the length of the ligand is good enough to create the cavities of molecular dimensions upon the formation of the networks with metal atoms [18][19][20][21]. Herein, we report the synthesis, crystal structure, infrared spectrum, and thermal behavior of a new one-dimensional copper complex: {[Cu(NAP) 2 ](4,4 0 -bpy) 1/2 }Á DMF (NAPH = a-naphthoic acid, 4,4 0 -bpy = 4,4 0 -bipyridine), with neutral naphthalene-carboxylate paddle-wheel binuclear units [Cu 2 (NAP) 4 ] and the rigid linear bidentate bridging ligand 4,4 0 -bipyridine.…”