The synthesis of crystalline microporous materials containing large pores is in high demand by industry, especially for the use of these materials as catalysts in chemical processes involving bulky molecules. An extra-large-pore silicoaluminophosphate with 16-ring openings, ITQ-51, has been synthesized by the use of bulky aromatic proton sponges as organic structure-directing agents. Proton sponges show exceptional properties for directing extra-large zeolites because of their unusually high basicity combined with their large size and rigidity. This extra-large-pore material is stable after calcination, being one of the very few examples of hydrothermally stable molecular sieves containing extra-large pores. The structure of ITQ-51 was solved from submicrometer-sized crystals using the rotation electron diffraction method. Finally, several hypothetical zeolites related to ITQ-51 have been proposed.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3593851 | PMC |
| http://dx.doi.org/10.1073/pnas.1220733110 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Microglia membrane-mediated trans-blood-brain barrier prodrug micelles enhance phagocytosis for glioblastoma chemo-immunotherapy.
J Control Release
January 2025
College of Pharmaceutical Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou 310058, China. Electronic address:
Glioblastoma-associated macrophages & microglia (GAMs) are critical immune cells within the glioblastoma (GBM) microenvironment. Their phagocytosis of GBM cells is crucial for initiating both innate and adaptive immune responses. GBM cells evade this immune attack by upregulating the anti-phagocytic molecule CD47 on their surface.
View Article and Find Full Text PDFTuning the nanostructure and tribological properties of a non-ionic deep eutectic solvent with water addition.
J Colloid Interface Sci
December 2024
School of Molecular Sciences, The University of Western Australia, Perth, WA 6009, Australia; Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, WA 6009, Australia. Electronic address:
Hypothesis: The addition of water to a non-ionic N-oxide deep eutectic solvent(DES) composed of phenylacetic acid (PhAA) and N-dodecylmorpholine-N-oxide(MO-12) in a 1:1 M ratio(PhAA/MO-12) will promote interfacial nanostructure formation due to increased proton transfer and solvophobic interactions, leading to reduced friction.
Experiments: The interfacial structure and friction of PhAA/MO-12 with water content up to 41.9 wt% were investigated at mica surfaces.
Water-Pore Flow Permeation through Multivalent H-Bonding Pyridine-2,6-dicarboxamide-histamine/Histidine Water Channels.
J Am Chem Soc
December 2024
Adaptive Supramolecular Nanosystems Group, University of Montpellier, Institut Européen des Membranes, ENSCM-CNRS, UMR5635, Place E. Bataillon CC047, Montpellier 34095, France.
Aquaporins (AQPs) are natural proteins that can selectively transport water across cell membranes. Heterogeneous H-bonding of water with the inner wall of the pores of AQPs is of maximal importance regarding the optimal stabilization of water clusters within channels, leading to selective pore flow water transport against ions. To gain deeper insight into the water permeation mechanisms, simpler artificial water channels (AWCs) have been developed.
View Article and Find Full Text PDFDiQuinoline-MonoQuinazoline: A Flat Proton Binder and Its Application as a Polyaromatic Hydrocarbon Scavenger and G4 Ligand.
Chemistry
December 2024
Keio University, Graduate School of Pharmaceutical Sciences, 1-5-30 Shibakoen, Minato-ku, 105-8512, Tokyo, JAPAN.
A new miniaturized framework for graphitic material featuring three neighboring pyridinic nitrogen atoms is disclosed. The quinoline/quinazoline hybridized pseudo trimeric macrocycle, DiQuinoline(Q)-MonoQuinazolines(Qz), Q2Qz1, was readily synthesized from the key macrocyclic amide precursor in a modular fashion. Its central cavity strongly captures a proton, and the thus-formed positively charged, highly planar architecture exhibits supramolecular complexation through 𝜋-interactions.
View Article and Find Full Text PDFMetal-Free Electrocatalytic Alkaline Water Splitting by Porous Macrocyclic Proton Sponges.
Angew Chem Int Ed Engl
December 2024
Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India.
Macrocycles are unique as they encapsulate and transfer guest molecules or ions and facilitate catalytic processes. Although metalated macrocycles are pivotal in electrocatalytic processes, using metal-free analogs has been rare. Following the strategy of Kanbara et al.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!