Reversible and Irreversible Chemisorption in Nonporous‐Crystalline Hybrids

Abstract

The tools of synthetic chemistry allow us to fine-tune the reactivity of molecules at a level of precision not yet accessible with inorganic solids. We have investigated hybrids that couple molecules to the superior thermal and mechanical properties of solids. Herein we present, to the best of our knowledge, the first demonstration of reactivity between hybrid perovskites and substrates. Reaction with iodine vapor results in a remarkable expansion of these materials (up to 36 % in volume) where new covalent CÀI bonds are formed with retention of crystallinity. These hybrids also show unusual examples of reversible chemisorption. Here, solid-state interactions extend the lifetime of molecules that cannot be isolated in solution. We have tuned the half-lives of the iodinated structures from 3 h to 3 days. These nonporous hybrids drive substrate capture and controlled release through chemical reactivity. We illustrate the strengths of the hybrid by considering radioactive iodine capture.

Postsynthetic Crystalline Transformation in Two-Dimensional Perovskites via Organothiol-Based Chemistry

“…8 Till the present time, the majority of 2D MHPs, regardless of the structural type and material form (e.g., thin film, powder, single crystal), are prepared using direct crystal growth from a predesigned solution containing large organic cations, halides, and metal precursors (Figure 1). [17][18][19] While There are few examples of the post-synthetic reactions for the 2D MHP structural transformation [20][21] , the key contribution of this work is to realize crystal interconversion of 2D MHPs using solution-based post-synthetic methods, and the crystal structures are well determined.…”

Controlling information duration on rewritable luminescent paper based on hybrid antimony (III) chloride/small-molecule absorbates

“…The compositions and ionic structural characteristics dictate relatively weak interactions between cations and anions in IOMHs, resulting in highly resilient structures and chemical reactivity ( 19 ). For instance, the chemisorption of iodine in nonporous two-dimensional (2D) IOMHs was reported ( 29 ), illustrating the absorption/desorption of guest molecules by IOMH structures. Considering the potential spectroscopic effects of the guest molecules on the PL properties of IOMHs, the absorption/desorption processes would result in reversible changes in the PL spectra for the IOMHs.…”

Polyphenylene Sulfide Ultrafine Fibrous Membrane Modified by Nanoscale ZIF-8 for Highly Effective Adsorption, Interception, and Recycling of Iodine Vapor

“…Table compares the I 2 adsorption capacities of some reported adsorbents with those of PPS-ZIF-8 and PPS-ZIF-8-BSA in this study. The maximum loading capacities of the PPS-ZIF-8 and PPS-ZIF-8-BSA membranes were 2.51 and 2.07 g/g, respectively, much higher than those of Ag@Mon-POF, ZIF-8, Sn 2 S 3 chalcogel granule or powder (SnS g /SnS p ), Pt–Ge–S chalcogen aerogels (CG-5C), (BYA) 2 [PbBr 4 ] m , and layered double hydroxide intercalated with polysulfides (S x -LDH) . Although the adsorption capacity of PSIF-1a can reach 4.85 g/g, PSIF-1a cannot intercept iodine vapor under a driving force.…”