Macroscopic Architecture of Charge Transfer-Induced Molecular Recognition from Electron-Rich Polymer Interpenetrated Porous Frameworks

Abstract

Fluorescent and electron-rich polymer threaded into porous framework provides a scaffold for sensing acceptor molecules through noncovalent interactions. Herein, poly(9-vinylcarbazole) (PVK) threaded MIL-101 with confined nanospace was synthesized by vinyl-monomer impregnation, in situ polymerization, and interpenetration. The pore size of the resulted hybrid could be controlled by varying the time of polymerization and interpenetration. The interaction of PVK-threaded MIL-101 with guest molecules showed a charge-transfer progress with an obvious red shift in the optical spectra. Depending on the degree of the interaction, the solution color changed from blue to green or to yellow. In particular, electron-rich PVK-threaded MIL-101 could effectively probe electron-poor nitro compounds, especially 1,3,5-trinitrobenzene (TNP), a highly explosive material. This sensing approach is a colorimetric methodology, which is very simple and convenient for practical analysis and operation.

Efficient adsorption separation of acetylene and ethylene via supported ionic liquid on metal‐organic framework

“…However, in comparison with parent MIL-101(Cr) mild right shifts of the main diffraction peaks were observed after confinement, ascribable to a small expansion of the structure of MIL-101(Cr). 66 It's noteworthy that the relative intensities of the peaks significantly weakened as increase of the loading of [Bmim][OAc], which can be attributed to the different electron density distribution when the substance is confined in the cavity. 67,68 A very similar change in relative intensity has been reported on other IL or polymer encapsulated MOF composites.…”

“…67,68 A very similar change in relative intensity has been reported on other IL or polymer encapsulated MOF composites. 66,69 The introduction of [Bmim][OAc] into the cavity of MIL-101(Cr) is also obvious from the change of the relative peak intensities. Additionally, successful incorporation of IL and survival of MOF structure were also confirmed by SEM observations.…”

A fluorescent probe for TNP detection in aqueous solution based on joint properties of intramolecular charge transfer and aggregation-induced enhanced emission

“…Up to now, some materials have been employed to detect TNP, including graphitic carbon nitride nanosheets [5], polydiacetylene microtube [6], metal complex [7], electron-rich polymer [8], and metal-organic framework [9]. Among them, fluorescent materials received more and more attentions, due to their sensitive, simple and low-cost properties [10].…”

Remarkable Vapochromic Behavior of Pure Organic Octahedron Embedded in Porous Frameworks

“…MOP is an intriguing category of crystalline porous materials self‐assembled by polytypic organic linkers and transition metal ions or clusters. Their easily tailored chemistry, high internal surface areas, and uniform and tunable cavities make them favorable for a variety of applications . MOP having uniform porosity and good stability could perfectly offset the shortages of the organic crystals.…”