Article
Chemistry, Multidisciplinary
Yuji Suzaki, Yugo Fukuchi, Hiroko Tadami, Take-aki Koizumi, Kohtaro Osakada, Tomohito Ide, Masaki Horie, Norihisa Hoshino, Tomoyuki Akutagawa
Summary: Pseudorotaxane undergoes crystalline phase transition at specific temperatures, forming a new crystal form. Additionally, a gel can be formed through ultrasonication of a mixture of axle and cyclic molecules in PhCl solution.
Article
Thermodynamics
Xiudong Zhang, Xianqiang Li, Chundong Zhang, Leiyu Zhang, Ruxing Gao
Summary: This study measured the vapor-liquid equilibrium (VLE) data of CO2 mixed with different ether solvents and found that 1,2-DME has the strongest CO2 absorption capacity, while ether bonds can improve the absorption ability of the solvent.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Crystallography
Qi-Ming Qiu, Jian-Biao Song, Li Yan, Ai-Guo Dong, Chuan-Tao Li, Zhi-Yuan Zheng
Summary: C12H14N2·2ClO(4) is monoclinic with the space group P2(1)/c (no. 14). The crystal parameters are: a = 5.3170(4) Å, b = 12.8711(8) Å, c = 11.6788(7) Å, β = 100.888(2) degrees, and the volume is 784.86(9) Å^3.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Marcello Monteleone, Giuseppe Barbieri, Paola Bernardo, Andrea Borgogno, Adele Brunetti, Gabriele Clarizia, Elisa Esposito, Johannes Carolus Jansen, Franco Tasselli, Elena Tocci, Ihab N. Odeh, J. R. Johnson, Karina K. Kopec, L. Giorno
Summary: Incorporating silver ions as ion complexes in the Pebax (R) 2533 matrix improves the long-term stability of facilitated transport membranes for olefin/paraffin separation without compromising permeability.
SEPARATION SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Kelong Zhu, Giorgio Baggi, Stephen J. Loeb
Article
Chemistry, Organic
Sarah J. Vella, Stephen J. Loeb
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Rubi A. Luna-Ixmatlahua, Anayeli Carrasco-Ruiz, Ruy Cervantes, Alberto Vela, Jorge Tiburcio
CHEMISTRY-A EUROPEAN JOURNAL
(2019)
Article
Chemistry, Multidisciplinary
Pablo Martinez-Bulit, Christopher A. O'Keefe, Kelong Zhu, Robert W. Schurko, Stephen J. Loeb
CRYSTAL GROWTH & DESIGN
(2019)
Article
Chemistry, Physical
Eva Meirovitch, Zhichun Liang, Robert W. Schurko, Stephen J. Loeb, Jack H. Freed
Summary: The application of the microscopic-order-macroscopic-disorder (MOMD) approach for analyzing dynamic H-2 NMR lineshapes in metal-organic frameworks (MOFs) is described in this study. By comparing the experimental results of UiO-68-d(4) and UWDM-9-d(4), it is found that MOFs with different structures exhibit different dynamic characteristics, and the phenyl-d(4) dynamics is more isotropic in a more crowded environment.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Multidisciplinary
Aldo C. Catalan, Axel A. Loredo, Ruy Cervantes, Jorge Tiburcio
Summary: This research introduces the process of forming pseudo-rotaxane using an electrostatically assisted sliding method, explores the effect of different macrocyclic conformational flexibility on sliding rate, and demonstrates that larger cyclic molecules can be slid through by combining different factors.
Article
Chemistry, Multidisciplinary
Ayan Dhara, Anton Dmitrienko, Rahaf N. N. Hussein, Ariel Sotomayor, Benjamin H. H. Wilson, Stephen J. J. Loeb
Summary: A rigid H-shaped [2]rotaxane molecular shuttle was synthesized, which consists of an axle containing benzimidazole recognition sites and a central bipyridyl group interlocked with a 24-crown-8 wheel. The central bipy unit acts as a speed bump that raises the barrier to shuttling for the [2]rotaxane. Coordination of a PtCl2 moiety to the bipy unit creates a steric barrier to shuttling, while addition of Zn(II) ions allows shuttling to occur through a ligand exchange mechanism.
Article
Chemistry, Organic
Naoko Kotera, Pilar Montellano, Aldo C. Catalan, Anayeli Carrasco-Ruiz, Ruy Cervantes, Jorge Tiburcio
Summary: Coordinated motions are crucial for the operation of molecular machines. This study introduces a method of modifying the energy curve by using a single stimulus, which describes the threading and shuttling of a ring along a linear molecule.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Giorgio Baggi, Benjamin H. Wilson, Ayan Dhara, Christopher A. O'Keefe, Robert W. Schurko, Stephen J. Loeb
Summary: An H-shaped [2]rotaxane composed of a bis(benzimidazole) axle and a 24-membered crown ether wheel with four trityl groups forms a highly crystalline material allowing large amplitude motion of the interlocked macrocycle, characterized using variable-temperature (VT) H-2 solid-state nuclear magnetic resonance (SSNMR).
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Benjamin H. Wilson, Louae M. Abdulla, Robert W. Schurko, Stephen J. Loeb
Summary: In this study, a new [2]rotaxane molecular shuttle linker based on the binding of a 24-crown-8 ether macrocycle at a benzimidazole recognition site was synthesised and characterised. The translational motion of the molecular shuttle was studied both in solution and in the solid state. Incorporation of mesitylene into the pores of UWDM-11 was found to significantly increase the barrier for thermally driven translation of the macrocycle.
Article
Chemistry, Physical
Ghazale Gholami, Benjamin H. Wilson, Kelong Zhu, Christopher A. O'Keefe, Robert W. Schurko, Stephen J. Loeb
Summary: Two Zr(IV) metal-organic frameworks (MOFs) were studied, incorporating a new H-shaped tetracarboxylate linker with [2]rotaxane molecular shuttles. Solid-state NMR and solution NMR spectra confirmed the successful incorporation of the [2]rotaxanes, while the study found that the structure of the linker affects the shuttling rate of the macrocyclic ring.
FARADAY DISCUSSIONS
(2021)
Article
Chemistry, Organic
Pablo Martinez-Bulit, Benjamin H. Wilson, Stephen J. Loeb
ORGANIC & BIOMOLECULAR CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Giorgio Baggi, Lorenzo Casimiro, Massimo Baroncini, Serena Silvi, Alberto Credi, Stephen J. Loeb
Article
Chemistry, Multidisciplinary
Giorgio Baggi, Stephen J. Loeb
CHEMISTRY-A EUROPEAN JOURNAL
(2017)
Article
Chemistry, Multidisciplinary
V. Nicholas Vukotic, Kelong Zhu, Giorgio Baggi, Stephen J. Loeb
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2017)
Article
Chemistry, Organic
Fuying Zhu, Yamei Lin
Summary: In this study, a low-metal iron-supported catalyst (Fe20/NC-Mg) was reported for the efficient synthesis of quinoxaline compounds, using water as a solvent and without additional bases. The synergistic effect of FeNx site and Mg (OH)2 nanorods in the catalyst played a key role in achieving high yields (82-91%) in 16 examples. The gram-level synthesis and reusability of the catalysts after four cycles demonstrated its industrial application potential.
Article
Chemistry, Organic
Mikhail Kozlov, Alexey Tyurin, Andrey Dmitrenok, Vyacheslav Rusak, Aleksander Fedorov, Igor Zavarzin, Yulia Volkova
Summary: This study presents a novel and practical synthesis method for phosphorus-substituted 1,3,4-thiadiazolines using phosphorylthioformic acid hydrazides and ketones. The protocol demonstrates operational simplicity, availability of reagents, and tolerance towards different functional groups.
Article
Chemistry, Organic
Jisna Jose, Thomas Mathew
Summary: 2-Cyclopentenone and its derivatives are highly esteemed synthetic intermediates with exceptional utility in organic synthesis. They are favored structural motifs in numerous pharmaceutical drugs and natural products, highlighting their significance. The review discusses the various methods used to synthesize cyclopentenones from 2016 to 2023.
