Amphiphilic Organic–Inorganic Hybrid Zeotype Aluminosilicate like a Nanoporous Crystallized Langmuir–Blodgett Film

Abstract

A new organic-inorganic hybrid zeotype compound with amphiphilic one-dimensional nanopore and aluminosilicate composition was developed. The framework structure is composed of double aluminosilicate layers and 12-ring nanopores; a hydrophilic layer pillared by Q(2) silicon atom species and a lipophilic layer pillared by phenylene groups are alternately stacked, and 12-ring nanopores perpendicularly penetrate the layers. The framework topology looks similar to that of an AFI-type zeolite but possesses a quasi-multidimensional pore structure consisting of a 12-ring channel and intersecting small pores equivalent to 8-rings. The hybrid material with alternately laminated lipophilic and hydrophilic nanospaces can be assumed as a crystallized Langmuir-Blodgett film. It demonstrates microporous adsorption for both hydrophilic and lipophilic adsorptives, and its outer surface tightly adsorbs lysozyme whose molecular size is much larger than its micropore opening. Our results suggest the possibility of designing porous adsorbent with high amphipathicity.

Hybrid organic–inorganic zeolites: status and perspectives

“…The novelty consists in the addition of a conventional silica source (TEOS) to the aqueous reaction mixture containing BTEB, NaOH and fumed alumina powder. 93,94 The synthesis procedure involves a two-step hydrolysis a Crystallization temperature = 100 °C; source of Ga: GaijOCHIJCH 3 ) 2 ] 3 . b Si/B = 2.30.…”

“…It is interesting to note that, similarly to ECSs, KCS-2 has a very narrow field of existence since well-defined conditions are necessary for obtaining it in a pure and well-crystallized form. 93,94 As described later, the structure of KCS-2 actually contains conventional [O 2 SiIJOH) 2 ] units; therefore, it represents the first example of a crystalline hybrid phase obtained from a mixture of conventional and unconventional silica sources.…”

Synergistic Effect between Different Coordination Geometries of Lanthanides and Various Coordination Modes of 2-Picolinic Acid Ligands Tuning Three Types of Rare 3d–4f Heterometallic Tungstoantimonates

“…Organic–inorganic hybrid materials (OIHMs) have intensively appealed to increasingly significant research enthusiasm over the last few decades not only because of their multitudinous chemical compositions and versatile binding modes in complicated structures but also because of the delicately synergetic effects between organic and inorganic ingredients creating extraordinary and available phenomena in fundamental and practical fields such as catalysis, magnetism, and photoelectricity. − Polyoxometalates (POMs), representing a particular class of charming metal-oxo clusters constructed from early transition metals with enormously diversified topologies, fascinating performances, and practical potentials in the various domains of catalysis, medicine, magnetism, optics, electrochemistry, sorption, and materials science, − can function as preeminent inorganic polydentate ligands to combine with diverse 3d- or 4f-metal cations constructing novel functional hybrid materials resulting from their controllable physicochemical functionalities at the micro scale and cooperative interactions within POMs and extraneous metal ions. Interestingly, in the field of POM chemistry, a hot area of research is the design and synthesis of innovative POM-based OIHMs (POMOIHMs) with specific functionalities.…”

Interpenetrated and Catenated Zinc Thiosulfates Frameworks with dia and qtz Nets: Synthesis, Structure, and Properties

“…To the best of our knowledge, this is the first observation of catenated layered structure involving thiosulfate hybrids. In addition, it may be noted that the structure of I has the basic building unit, the four-membered ring, formulated to be the fundamental building unit in the tetrahedral structures of aluminosilicate and aluminophosphates. − The observation of the simple four-membered ring structure in the present compounds suggests that it may be possible to prepare compounds that are similar to the phosphates and silicates. − …”