Insertion of Iodine in a Functionalized Inorganic Layered Solid

Abstract

The galleries of a Mg-Al layered double hydroxide have been functionalized by intercalation of (carboxymethyl)-beta-cyclodextrin cavities. The functionalized inorganic solid can adsorb iodine molecules from vapor as well as nonaqueous and aqueous solutions. The adsorbed iodine complexes with the grafted cyclodextrin cavities, disassociating heterolytically to form polyiodide species. Electronic and Raman spectra provide conclusive evidence for the existence of linear symmetric triodide, I(3)(-), and pentaiodide, I(5)(-), species within the cyclodextrin cavities confined in the layered double hydroxide.

Adsolubilization of 2,4,6-trichlorophenol from aqueous solution by surfactant intercalated ZnAl layered double hydroxides

“…With further study of LDHs, anionic surfactants with long alkyl chain can be intercalated into the interlayer. The intercalation of anionic surfactants between layers of LDHs can change the original hydrophilic surface to hydrophobic accompanied by the increased interlayer spacing [35][36][37][38][39][40][41][42][43]. These significant variations endow modified LDHs new adsorptive properties for some organic molecules that general LDH materials do not.…”

Organic-Inorganic Nanohybrids of Biologically Important Molecules and Layered Double Hydroxides

“…It was found, however, that minor transformations of cyclodextrins could make them anionic, thus, carboxymethylated- [49][50][51][52][53][54][55], carboxyethylated- [56] sulfopropylated- [56] as well as sulfated-β-cyclodextrins [57,58] could be and, indeed, were intercalated into LDHs through anion exchange. In these cavities a large variety of neutral organic and inorganic molecules of considerable sizes can be trapped.…”

Nanocage Structure Derived from Sulfonated β-Cyclodextrin Intercalated Layered Double Hydroxides and Selective Adsorption for Phenol Compounds

“…There have been many reports involving in the intercalation of carboxymethyl-β-cyclodextrin (CMCD) into LDHs and the properties. 9c, 11,12b,13 MgAl-LDH intercalated with CMCD cavities can selectively adsorb I 2 , 14 and neutral guests as naphthalene, 15 anthracene, 16 ferrocene, 17 and many organic compounds. 12b ZnAl-LDH intercalates with CMCD cavities were also used for selective adsorption of phenol and nitrobenzene, 11 racemic phenylalanine, 13b dodecylbenzene, 18 and nucleosides adenosine and guanosine.…”