Article
Chemistry, Multidisciplinary
Fatima Lucio-Martinez, Jose M. Vila, Francisco Reigosa, Brais Bermudez, Harry Adams, M. Teresa Pereira
Summary: The synthesis and structural characterization of the first cyclometallated platinum(II) complex coordinating a potassium cation in a sandwich arrangement via two 15-crown-5 ether rings within the same molecule are reported. The importance of choosing the right diphosphane ligand in obtaining double nuclear platinacycles is highlighted. Density functional theory calculations reveal similar affinities for both dppm and vdpp derivatives to coordinate potassium cations.
Review
Chemistry, Inorganic & Nuclear
Guddekoppa S. Ananthnag
Summary: Crown ethers are cyclic polyethers that can bind to specific size and charge cations based on their ring size, donor atoms, and geometry. The introduction of other donor atoms can enhance their host-guest chemistry. Phosphorus donors can be added to the crown ethers to create hybrid ligands that selectively bind to different types of cations and transition metal centers. This review focuses on the synthesis and catalytic aspects of crown ethers, aza-crown ethers, and thia-crown ethers appended with phosphorus donors on the periphery.
COMMENTS ON INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Maxime A. Bonnin, Claus Feldmann
Summary: Crown-ether coordination compounds with Mn2+ and Sn2+ cations and various ligands were synthesized and compared for their luminescence properties and quantum yields. The coordination of the cations by crown ethers and their structural features were found to influence the luminescence efficiency, providing insights into conditions for intense emission and high quantum yields.
INORGANIC CHEMISTRY
(2021)
Review
Chemistry, Organic
Zhaona Liu, Huacheng Zhang, Jie Han
Summary: The combination of Nobel macrocycle-crown ether and star macrocycle-pillararenes offers significant advantages in organic synthesis and material science, providing hybrid systems with flexible/rigid structural architecture, induced planar chirality, negative cooperative effect, and multiple fused cyclic hosts. The synthesis and preparation of these hybrid systems can be achieved through various bonding methods, leading to applications in molecular recognition, ion channels, and smart materials. Researchers are encouraged to explore academic and technical issues related to topological structures and applied functions in this emerging field of fused macrocycles.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Tiezheng Pan, Jiangbo Li, Bo Li, Qiangqiang Xu, Zhiliyu Cui, Jie Shang, Yan Ge, Zhenhui Qi
Summary: This study found that the sensitivity of supramolecular assemblies based on OEG to guanidinium-containing species is influenced by their cyclic and linear forms, with the cyclic form having a higher binding constant. By designing crown ether derivatives with different topologies, manipulation of the relationship between supramolecular solutes, water, and guanidinium salts is possible, providing an alternative strategy for fabricating thermal-responsive systems in ionic medium.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Fang-Fang Di, Lin Zhou, Wu-Jia Chen, Jun-Chao Liu, Hang Peng, Shu-Yu Tang, Hang Yu, Wei-Qiang Liao, Zhong-Xia Wang
Summary: Based on the momentum matching theory, a room-temperature crown ether based switchable dielectric material has been successfully designed, showing a higher phase transition temperature and great potential for bistable dielectric switches at room temperature. This work opens up new possibilities for the development of crown ether inclusion complex dielectric switches for various applications.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Lin Xiang, Wang Luo, Zhi-Yuan Yue, Yi-Fang Huang, Na Wang, Le-Ping Miao, Heng-Yun Ye, Chao Shi
Summary: Molecule-based switchable dielectrics with distinct changes of dielectric constant under external stimuli are technologically important. In this study, a new crown-ether clathrate was synthesized and found to exhibit reversible phase transition and bistable dielectric response.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yang Liu, Cong-Zhi Wang, Qun-Yan Wu, Jian-Hui Lan, Zhi-Fang Chai, Wang-Suo Wu, Wei-Qun Shi
Summary: Effective separation and recovery of chemically similar transplutonium elements from adjacent actinides is challenging in spent fuel reprocessing. In this study, the coordination mechanism between transplutonium elements and crown ether macrocyclic ligands was systematically investigated. The results provide theoretical clues for the design and development of macrocycle ligands for the in-group separation of transplutonium elements.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Julian P. Schroers, Max N. Kliemann, John M. A. Kollath, Michael E. Tauchert
Summary: A series of Rh-I complexes with cationic diphosphinometal ligands (PMPn+) were synthesized, and the impact of Rh-I -> Mn+ interactions on other ligands coordinated to the Rh-I center was studied. It was found that the Rh-CO bond strength in square pyramidal [(PMP)Rh(CO)X](n+)-type complexes (X = Cl, H) is primarily influenced by the charge of the metalloligand. Computational analysis of octahedral [(PMP)Rh(CO)(2)H](n+) model complexes indicated a strengthening of the Rh-CO bond trans to the metalloligand with increasing atomic number of the metalloligand.
Article
Chemistry, Physical
Quentin De Roover, Timothe Vucko, Stephane P. Vincent, Julien De Winter, Olivier Coulembier
Summary: The azobenzene-bridged 15-crown-5 ether was successfully utilized as a photoswitchable cocatalyst to modulate the catalytic activity of potassium acetate in the ring-opening polymerization of L-lactide. By alternating exposure to daylight and UV light, the ion pair-like structure of KOAc was transformed on-demand, resulting in effective modulation of the polymerization speed from slow to fast.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Guo-Jun Yuan, Ye-Ting Luan, Ji-Bin Miao, Cai-Feng Wang, Li Chen, Chao Chen, Hong Chen, Li Li, Xiao-Ming Ren
Summary: Crown ethers are valuable in the fields of supramolecular chemistry and crystal engineering due to their significant conformational flexibility and rotational symmetry. This study synthesized and characterized four supramolecular compounds and found that the crystal structure, phase transition, and dielectric properties are significantly influenced by the size of the crown-ether rings. The research also discussed the coordination mode of metal ions with crown ethers, the compatibility between metal ions and crown-ether rings in terms of size, and the effects of crown-ether disorder on dielectric permittivity during phase transitions.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Peng Cui, Changjiang Wu, Jun Du, Gen Luo, Zeming Huang, Shuangliu Zhou
Summary: The metalation of beta-diketiminato rare-earth metal complexes with Pd resulted in the formation of three-coordinate Pd(0) complexes, followed by investigation of the mechanism of C-P bond cleavage and N-C bond formation. Computational studies revealed a synergetic bimetallic mechanism playing a crucial role in these reactions.
INORGANIC CHEMISTRY
(2021)
Article
Polymer Science
Svetlana Ch Gagieva, Dmitrii A. Kurmaev, Vladislav A. Tuskaev, Viktor N. Khrustalev, Andrei Churakov, Evgenii K. Golubev, Alexander Sizov, Tamara M. Zvukova, Mikhail Buzin, Galina G. Nikiforova, Maria D. Evseeva, Boris M. Bulychev
Summary: This study demonstrates for the first time the potential of stable cationic titanium (III) complexes as pre-catalysts for polymerization, achieving the synthesis of Ultra High Molecular Weight Polyethylene (UHMWPE) with high productivity and molecular weight. The UHMWPE powders were processed into high-strength and high-modulus films through solid-phase method.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Organic
Yanyan Tan, Shaowu Pan, Shilong Zhang, Lin Fang, Feichun Zhang, Yuanyuan Zhang, Lasheng Jiang
Summary: Here, we report the syntheses of two new crown-ether-based cryptands and their complexation behaviors with neutral organic molecules. We found that one of the cryptands showed excellent complexation ability with G2, with a high association constant of 2.5x10(5) M-1.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Florent Moutier, Jana Schiller, Guillaume Calvez, Christophe Lescop
Summary: The study successfully achieved selective coordination-driven supramolecular synthesis by introducing bridging halide X ions, resulting in the generation of bimetallic connecting nodes with a potential coordination angle of approximately 120 degrees. The tetranuclear metallacycles obtained from the reaction exhibited high emission quantum yields in the solid state at room temperature, with photophysical properties suggesting a ligand B-centered triplet origin for their luminescence.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Pablo Frieiro-Gomis, Fatima Lucio-Martinez, Paula Munin-Cruz, Juan M. Ortigueira, M. Teresa Pereira, Paula Polo-Ces, Digna Vazquez-Garcia, Jose M. Vila
CHEMICAL COMMUNICATIONS
(2018)
Review
Chemistry, Multidisciplinary
Adolfo Fernandez-Figueiras, Fatima Lucio-Martinez, Paula Munin-Cruz, Juan M. Ortigueira, Paula Polo-Ces, Francisco Reigosa, M. Teresa Pereira, Jose M. Vila
Article
Chemistry, Inorganic & Nuclear
Alberto Cuquejo-Cid, Alberto Garcia-Fernandez, Javier Garcia-Ben, Maria A. Senaris-Rodriguez, Socorro Castro-Garcia, Manuel Sanchez-Andujar, Digna Vazquez-Garcia
Summary: Through a wet-chemistry route, we have effectively doped the ferroelectric compound CHA(2)PbBr(4) with Mn2+, resulting in materials with interesting crystal structures, photoluminescence, and selectivity towards volatile organic compounds. These Mn-doped compounds exhibit potential for multifunctional applications in various fields.
Article
Chemistry, Inorganic & Nuclear
Oscar A. Lenis-Rojas, M. Paula Robalo, Ana Isabel Tomaz, Alexandra R. Fernandes, Catarina Roma-Rodrigues, Ricardo G. Teixeira, Fernanda Marques, Monica Folgueira, Julian Yanez, Anabel Alba Gonzalez, Martin Salamini-Montemurri, Dawrin Pech-Puch, Digna Vazquez-Garcia, Margarita Lopez Torres, Alberto Fernandez, Jesus J. Fernandez
Summary: Ruthenium(II) complexes, considered as attractive alternatives to platinum-based drugs, demonstrated significant cytotoxicity against breast cancer cells with lower toxicity towards normal cells, possibly through induction of reactive oxygen species and interaction with protein targets.
INORGANIC CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Oscar A. Lenis-Rojas, Catarina Roma-Rodrigues, Alexandra R. Fernandes, Andreia Carvalho, Sandra Cordeiro, Jorge Guerra-Varela, Laura Sanchez, Digna Vazquez-Garcia, Margarita Lopez-Torres, Alberto Fernandez, Jesus J. Fernandez
Summary: This study presents the first in vivo research on Ru(II)-polypyridyl complexes against breast cancer, showing promising results with both mono- and dinuclear compounds. Ru1 and Ru2 were able to reduce tumor size significantly at low doses without causing lethality, indicating their potential as chemotherapy agents in breast cancer therapy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Multidisciplinary Sciences
Alberto Cuquejo-Cid, Alberto Garcia-Fernandez, Catalin Popescu, Juan Manuel Bermudez-Garcia, Maria A. Senaris-Rodriguez, Socorro Castro-Garcia, Digna Vazquez-Garcia, Manuel Sanchez-Andujar
Summary: A detailed study of lead halide-layered perovskites with different crystal structures and thermomechanical responses, including unusual thermal expansion and phase transitions, as well as broad photoluminescence emission, was presented.
Article
Chemistry, Multidisciplinary
Fatima Lucio-Martinez, Jose M. Vila, Francisco Reigosa, Brais Bermudez, Harry Adams, M. Teresa Pereira
Summary: The synthesis and structural characterization of the first cyclometallated platinum(II) complex coordinating a potassium cation in a sandwich arrangement via two 15-crown-5 ether rings within the same molecule are reported. The importance of choosing the right diphosphane ligand in obtaining double nuclear platinacycles is highlighted. Density functional theory calculations reveal similar affinities for both dppm and vdpp derivatives to coordinate potassium cations.
Article
Chemistry, Multidisciplinary
Alberto A. . Fernandez, Margarita Lopez-Torres, Jesus J. Fernandez, Digna Vazquez-Garcia
Summary: Students created videos of ordinary reactions to enhance their understanding of complex concepts in chemical transformations. Interactive infographics were used for instruction delivery, and students used their mobile phones to plan and record the experiment. The videos and an online questionnaire created by the students were shared on the visual platform Padlet. The activity helped improve students' comprehension of chemical equations, as shown by improved marks in related questions.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Chemistry, Multidisciplinary
Paula Munin-Cruz, Francisco Reigosa, Marcos Rua-Sueiro, Juan M. Ortigueira, M. Teresa Pereira, Jose M. Vila
Article
Chemistry, Inorganic & Nuclear
Adolfo Fernandez-Figueiras, Fatima Lucio-Martinez, Paula Munin-Cruz, Paula Polo-Ces, Francisco Reigosa, Harry Adams, M. Teresa Pereira, Jose M. Vila
DALTON TRANSACTIONS
(2018)
