Porous Field-Effect Transistors Based on a Semiconductive Metal–Organic Framework

Recently, the emergence of conductive metal–organic frameworks (MOFs) has given great prospects for their applications as active materials in electronic devices. In this work, a high-quality, free-standing conductive MOF membrane was prepared by an air–liquid interfacial growth method. Accordingly, field-effect transistors (FETs) possessing a crystalline microporous MOF channel layer were successfully fabricated for the first time. The porous FETs exhibited p-type behavior, distinguishable on/off ratios, and excellent field-effect hole mobilities as high as 48.6 cm² V^–1 s^–1, which is even comparable to the highest value reported for solution-processed organic or inorganic FETs

Immobilization of Volatile and Corrosive Iodine Monochloride (ICl) and I₂ Reagents in a Stable Metal–Organic Framework

The major discovery here is a robust and water-stable metal–organic framework (MOF) material capable of reversible binding of the volatile and reactive molecules of ICl and I₂. The immobilization of I₂ and ICl, as well as their controllable release thus achieved, is to facilitate the wide-ranging applications of these volatile species as catalysts and reagents in chemical and industrial processes. The framework material TMBP·CuI (hereafter TCuI) can be conveniently prepared in quantitative yields by heating CuI and the organic linker TMBP (3,3′,5,5′-tetramethyl-4,4′-bipyrazol) in acetonitrile. The microporous three-dimensional net of TCuI features CuI chains that contribute to efficient and reversible binding of ICl and I₂ molecules, to result in the stoichiometrically well-defined adducts of TCuI·ICl and TCuI·I₂, respectively. Moreover, the confinement of a volatile compound like ICl within the MOF medium provides unique opportunities to enhance its reactivity and selectivity as a chemical reagent, as is exemplified by the iodination reactions examined herein. With this exemplary study, we intend to stimulate interest in further exploring MOFs and other porous media (e.g., porous polymers) for entrapping ICl and other volatile reagents (e.g., Br₂, SCl₂, S₂Cl₂, and SOCl₂) and for potentially novel reactivity associated with the porous medium