Ultrastrong Alkali-Resisting Lanthanide-Zeolites Assembled by [Ln₆₀] Nanocages

Abstract

Zeolites, as one of the most important porous materials, are most widely utilized in sorbents, catalysis, and ion-exchange fields. However, the multi-functional lanthanide-zeolites constructed exclusively by lanthanide ions and oxygen linkers are to our knowledge unknown hitherto. Herein, we, for the first time, report the unique structure and multifunctions of lanthanide zeolites (1·Gd, 1·Tb, 1·Dy), featuring 60 nuclear [Ln60] nanocages as building blocks and ultrastrong alkali-resisting. These compounds possess extremely high stability and still retain single crystallinity after treatment in boiling water, 0.1 M HCl, and 20 M NaOH aqueous solutions. Magnetic studies revealed 1·Gd has large magnetocaloric effect with -ΔSm(max) = 66.5 J kg(-1) K(-1), falling among the largest values known to date. Importantly, these lanthanide-zeolites themselves can efficiently catalyze the cycloaddition of CO2 with epoxides under mild conditions. Our finding extends the conventional zeolites to lanthanide counterparts, opening a new space for seeking novel and/or multifunctional zeolites.

3d-4f Heterometal–Organic Frameworks for Efficient Capture and Conversion of CO2

“…Emerging as a new class of functional materials, metal organic frameworks (MOFs), [28][29][30][31][32][33] which feature tailorable structures, exceptional properties, [34][35][36][37][38][39][40][41] have been proposed to be promising materials to meet the dual challenge of CO 2 capture and conversion for the following reasons: (a) the porous MOFs can significantly absorb CO 2 , 42-45 (b) the well ordered porous structures can enrich substrates and facilitate the accessibility of substrates to active sites, (c) the metal ions can serve as Lewis acid sites to efficiently activate epoxide, [46][47][48][49] …”

A Porous Metal–Organic Framework Assembled by [Cu30] Nanocages: Serving as Recyclable Catalysts for CO2 Fixation with Aziridines

“…Carbon dioxide (CO 2 ), as the major waste gas from industrial and human activities, can be considered as one of the main greenhouse gases responsible for global warming 1. Hence, the effective utilization associated with reduction of carbon emission has become an urgent and challenging research topic,2 and many efforts have been directed toward converting CO 2 into various valuable chemicals,3 which are currently obtained from fossil fuel resources. One of the effective strategies for CO 2 conversion is the coupling reaction of CO 2 with aziridines to afford oxazolidinones due to not only high reactivity of aziridines toward CO 2 and ideal atom efficiency, but also the important applications of oxazolidinones as chiral auxiliaries, intermediates in organic synthesis, and medical chemistry 4.…”

High-performance low-temperature magnetic refrigerants made of gadolinium-hydroxy-chloride

“…S3 (ESI †) shows the X-ray photoelectron spectroscopy (XPS) survey spectra and narrow scan XPS spectra for 1 and 2. 15 PXRD shows that the structure of 1 remains stable after immersing the as-synthesized sample in 2.5 M NaOH for 14 days or 10 M NaOH for 3 days at least (Fig. 14 The content ratios of Gd : Cl derived from the XPS analysis are close to 3 : 1 and 1 : 1, which correspond to the formulae of [Gd 3 (OH) 8 Cl] n and [Gd(OH) 2 Cl] n for 1 and 2, respectively.…”