Article
Chemistry, Inorganic & Nuclear
Michael L. Tarlton, Suntharalingam Skanthakumar, Danielle Hutchison, Alexander J. Gremillion, Allen G. Oliver, Richard E. Wilson
Summary: A hybrid double perovskite phase with the formula ((CH3)(4)N)(2)KLn(NO3)(6) was synthesized to study the periodic chemical properties and structural chemistry of rare earth elements. This series represents a rare isostructural series spanning the entirety of the rare earth elements, with homoleptic 12-coordinate rare earth metal ions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Li-Juan Zhao, Bin Li, Guo-Ping Yong
Summary: Four novel isostructural lanthanide metal-organic frameworks were synthesized and characterized. One of them showed better sensitivity and selectivity towards Fe3+ ions and Cr2O72- anions. All four frameworks remained stable during the tests.
Article
Chemistry, Inorganic & Nuclear
Yushu Jiao, Sergio Sanz, Natalya V. Izarova, Jan van Leusen, Sidra Sarwar, Scott J. Dalgarno, Euan K. Brechin, Paul Koegerler
Summary: The complementarity between calixarene and polyoxometalate ligands leads to the formation of the first organic-inorganic hybrid compound [(ML)-L-III{Mo5O13(OMe)(4)(NO)}](2-) (M = Y, Gd and Dy), which exhibits a distorted square-antiprismatic MO8 ligand field and shows slow relaxation of magnetisation in the Dy derivative.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Qianlan Hu, Tong Xu, Jiaming Gu, Lirong Zhang, Yunling Liu
Summary: Due to their fluorescence properties, lanthanide metal-organic framework (Ln-MOF) materials have potential applications in the detection of metal ions and nitro-aromatic explosives. In this study, a series of isostructural Ln-MOFs were synthesized and characterized. The luminescence sensing tests showed that some of these Ln-MOFs exhibited high sensitivity and selectivity towards specific targets.
Article
Chemistry, Multidisciplinary
Lucas Ueberricke, Farhad Ghalami, Wen-Shan Zhang, Vaishnavi Rao, Frank Rominger, Rasmus R. Schroeder, Marcus Elstner, Michael Mastalerz
Summary: Control of spatial arrangement of donor and acceptor molecules plays a crucial role in charge transfer in organic electronics. Different crystallization modes among various cocrystals make direct and systematic comparison of different donor-acceptor pairs difficult. By studying isostructural packing, it was revealed that the voids formed by the donor could encapsulate acceptor molecules.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Shao-Jun Hu, Xiao-Qing Guo, Li-Peng Zhou, Dan-Ni Yan, Pei-Ming Cheng, Li-Xuan Cai, Xiao-Zhen Li, Qing-Fu Sun
Summary: Chiral luminescent lanthanide-organic cages have potential applications in enantioselective recognition, sensing, and asymmetric catalysis, but their structures are limited. This study introduces a guest-driven self-assembly and chiral induction approach to construct Ln(4)L(4)-type tetrahedral hosts, showcasing remarkable guest-adaptive cavity breathing and variation tolerance on coordination geometry of f-elements.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Tian-Qi Lu, Jia-Jia Yin, Cheng Chen, Hai-Yan Shi, Jun Zheng, Zhengjie Liu, Xiaolong Fang, Xiu-Ying Zheng
Summary: Two pairs of high-nuclearity chiral lanthanide-oxo clusters were prepared using chiral ligands, showing stability and assembly capabilities in solution based on structural analysis and mass spectrometry experiments. Solid-state spectra demonstrated mirror symmetry effects, while magnetic studies revealed one compound exhibiting single-molecule magnet behavior in the absence of a direct current field.
Article
Chemistry, Inorganic & Nuclear
Jingwen Liu, Xue Han, Yantong Lu, Shuo Wang, Dian Zhao, Chunxia Li
Summary: The study utilized two similar organic linkers to construct lanthanide metal-organic frameworks, which showed good relative sensitivity, low temperature uncertainty, and potential applications in temperature measurement and in situ monitoring in microelectronics. These materials exhibited distinct luminescence responses to temperature and energy transfers between ligands and lanthanide ions were investigated both theoretically and experimentally.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Rui Zhai, Yihong Xiao, Zhigang Gu, Jian Zhang
Summary: This study demonstrates the development of chiroptical thin films with circularly polarized luminescence (CPL) through the encapsulation of achiral lanthanide complexes into surface-coordinated chiral metal-organic framework thin films. The resulting thin films exhibit strong and tunable CPL properties, showcasing the potential for efficient energy transfer and excellent CPL performance.
Article
Computer Science, Artificial Intelligence
Clement Pealat, Guillaume Bouleux, Vincent Cheutet
Summary: This study proposes a method to embed time series into higher-dimensional spaces for clustering and analyzes the performance of different embedding techniques. The results demonstrate that embedding time series in higher-dimensional spaces can achieve better clustering results compared to traditional methods.
PATTERN RECOGNITION
(2022)
Review
Chemistry, Inorganic & Nuclear
Akhilesh Kumar Singh
Summary: Lanthanide-based luminescent hybrid materials, which consist of organic moieties as sensitizers and inorganic lanthanide ions as activators, have been extensively studied in fields such as sensing, LEDs, security inks, bioimaging, and improving the stability/efficiency of halide perovskite-based optoelectronic devices. Recent developments include near-infrared dye-sensitized hybrid upconverting materials and the use of lanthanide-based hybrid materials to enhance the stability and efficiency of halide perovskite optoelectronic devices.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Sadaf ul Hassan, Muhammad Asim Farid, Yingxia Wang
Summary: Five new isostructural lanthanide-organic complexes have been synthesized and characterized, showing luminescent properties and potential for sensing small molecules. Additional studies revealed energy transfer mechanisms and the possibility of reusability for the complexes.
Article
Chemistry, Inorganic & Nuclear
Yan-Ling Huang, Li-Xin Wang, Yun Li, Bing-Bing Yang, Xu Zhang, Jing Xiang
Summary: Three isostructural mononuclear Ln(III) compounds (NH4)[LnIII(L)2(H2O)] (Ln = Dy (1), Tb (2), Eu (3), tBu2L = 6,6'-bis(1-tbutyl-tetrazol-5-yl)-2,2'-bipyridine) were obtained in moderate yields by the hydrothermal reactions of a tetradentate ligand tBu2L with hydrated LnIII(NO3)3. Their crystal structures have been determined and the metal centers are 9-coordinated by two L ligands and an aqua molecule in a spherical tricapped trigonal prism with a D3h symmetry. The compounds exhibit characteristic metal-centered emissions and interesting slow magnetic relaxation under an external dc field.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Avik De, Sukhen Bala, Sayan Saha, Krishna Sundar Das, Sohel Akhtar, Amit Adhikary, Arijit Ghosh, Guo-Zhang Huang, Srijita Paul Chowdhuri, Benu Brata Das, Ming-Liang Tong, Raju Mondal
Summary: The study presents the synthesis, characterization, and luminescence-magnetic properties of Ln-clusters using a novel ligand. The clusters exhibit unique features such as chirality and interesting fluorescence and magnetic behavior, with the Gd cluster showing significant cryogenic magnetic cooling behavior. These compounds were effectively used as fluorescent probes for imaging of human breast adenocarcinoma cells.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Eun Gyu Lee, Hyeon min Han, Jong Hwa Jung, Sung Ho Jung
Summary: We have developed a tunable emissive supramolecular metallo-gel functionalized with lanthanide coordination bonds. By controlling the stoichiometry of lanthanide metal ions with respect to ligand:Tb(iii):Eu(iii), different colors of light-emitting gels could be obtained.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
David Parker, Jack D. Fradgley, Martina Delbianco, Matthieu Starck, James W. Walton, Jurriaan M. Zwier
Summary: The sensitivity of Eu(iii) complexes to quenching by electron and energy transfer processes was compared, showing different responses depending on the molecular structure. The quenching of Eu(iii) excited states can occur through different mechanisms, with rates influenced by the ligand structure and environment.
FARADAY DISCUSSIONS
(2022)
Article
Multidisciplinary Sciences
Patrycja Stachelek, Lewis MacKenzie, David Parker, Robert Pal
Summary: The authors introduce a live-cell imaging system using chiroptical contrast, enabling the study of chiral interactions. They demonstrate simultaneous imaging of enantiomeric pairs of molecular probes emitting circularly polarised light, using both single and two-photon excitation.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jack D. Fradgley, Matthieu Starck, Laurent Lamarque, David Parker
Summary: This paper reports the synthesis and photophysical evaluation of a series of hydrophilic sulphonated and pH-responsive luminescent europium(III) probes. The emission intensity and lifetime of Europium(III) increase significantly at lower pH, resulting in the "switching on" of its luminescence in more acidic environments. The pK(a) value of the complex can be tuned by varying the substituents, allowing selective tagging of proteins and monitoring of pH change in real time.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Biophysics
Gaurav Sharma, Nesmine Maptue, Mohsin Rahim, Miriam L. Trigo L. Mijes, Thomas Hever, Xiaodong Wen, Alexander M. M. Funk, Craig R. R. Malloy, Jamey D. D. Young, Chalermchai Khemtong
Summary: This study evaluated the feasibility of hyperpolarization examinations in an isolated kidney model for analysis of renal physiology and validated the utilization of HP [1-C-13]pyruvate. The findings suggest that the isolated rat kidney may serve as an excellent model for exploring and establishing new HP C-13 metabolic probes for future kidney imaging applications.
NMR IN BIOMEDICINE
(2023)
Article
Chemistry, Multidisciplinary
Shiny Maity, Brad D. D. Price, C. Blake Wilson, Arnab Mukherjee, Matthieu Starck, David Parker, Maxwell Z. Z. Wilson, Janet E. E. Lovett, Songi Han, Mark S. S. Sherwin
Summary: We propose a time-resolved Gd-Gd electron paramagnetic resonance (TiGGER) technique at 240 GHz to monitor inter-residue distances in proteins' mechanical cycles in solution state. TiGGER utilizes Gd-sTPATCN spin labels with favorable properties, including spin-7/2 EPR-active center, short linker, narrow intrinsic linewidth, and minimal anisotropy at high fields. By applying TiGGER, we observed that the C-terminus and N-terminus of AsLOV2 separate within 1 s upon light activation and relax back to equilibrium with a time constant of approximately 60 s. TiGGER also revealed that the light-induced long-range mechanical motion is decelerated in the Q513A variant of AsLOV2, which is correlated with the slowed relaxation of the optically excited chromophore as reported in recent literature. TiGGER has the potential to complement existing methods for studying triggered functional dynamics in proteins.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Zuzana Kotkova, Filip Koucky, Jan Kotek, Ivana Cisarova, David Parker, Petr Hermann
Summary: A series of Cu(II) complexes with cyclam-based ligands containing two N-(2,2,2-trifluoroethyl)-aminoalkyl pendant arms were studied for their potential use as F-19 MRI contrast agents. Structural analysis and NMR measurements revealed the formation of isomeric complex species in solution. The Cu(II) ion showed significant relaxation enhancement and can be considered as a highly suitable metal ion for efficient F-19 MRI contrast agents.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Organic
Sean R. Barlow, Geoffrey R. Akien, Nicholas H. Evans
Summary: Hydrogen bond templated [2]catenanes and [2]rotaxanes were synthesized using azide precursors derived from a single isophthalic acid derivative precursor. The interlocked molecules were prepared with either stoichiometric or near stoichiometric amounts of macrocycle and CuAAC click precursors, yielding up to 70% in the mechanical bond formation step. Confirmation of successful preparation of the interlocked structures was achieved through NMR spectroscopy and mass spectrometry, with detailed elucidation of co-conformational behavior using a range of H-1 NMR spectroscopic experiments.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Geriatrics & Gerontology
Janusz von Renesse, Felix von Bechtolsheim, Sophie Jonas, Lena Seifert, Tiago C. C. Alves, Adrian M. M. Seifert, Filip Komorek, Guergana Tritchkova, Mario Menschikowski, Ulrich Bork, Ronny Meisterfeld, Marius Distler, Triantafyllos Chavakis, Jurgen Weitz, Alexander M. M. Funk, Christoph Kahlert, Peter Mirtschink
Summary: This study used H-1 nuclear magnetic resonance (NMR) spectroscopy to quantitatively measure serum metabolites of tumor patients with gastrointestinal cancer and pancreatic cancer, which are known to cause malnutrition and cachexia. The study identified cancer-specific metabolic differences and found a quick normalization of metabolic alterations in tumor patients post-surgery. The catabolic signature identified in gastrointestinal cancer patients was independent of malnutrition and systemic inflammation.
JOURNAL OF CACHEXIA SARCOPENIA AND MUSCLE
(2023)
Article
Biochemistry & Molecular Biology
Jesus M. Roldan-Pena, Adrian Puerta, Jelena Dinic, Sofija Jovanovic Stojanov, Aday Gonzalez-Bakker, Francisco J. Hicke, Atreyee Mishra, Akkharadet Piyasaengthong, Ines Maya, James W. Walton, Milica Pesic, Jose M. Padron, Jose G. Fernandez-Bolanos, Oscar Lopez
Summary: Most of the currently available cytotoxic agents lack selectivity and cause severe side-effects. In order to address this issue, we focused on selenium derivatives as potential prodrugs that can release reactive species on tumour cells. By conjugating the optimized structure with biotin, we developed a selective vector for malignant cells, which exhibited strong antiproliferative effects and outstanding selectivity.
BIOORGANIC CHEMISTRY
(2023)
Article
Optics
Huishan Li, David Parker, Jing-Xiang Zhang, Hongguang Li
Summary: The analysis of variations in emission lifetime and spectral signature in a series of structurally related cationic Eu(III) triamide complexes has revealed the changes in probe speciation due to probe environment. These cationic complexes show an inherent tendency to localize in cellular nucleoli or lysosomes, providing valuable insights for the design and evaluation of targeted probes. Each of the three complexes studied has a coordinated water molecule in aqueous media, which is absent in organic solvents or displaced by protein binding. The observed complex in cells is likely a protein-bound Eu complex.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Multidisciplinary
Marcus J. Giansiracusa, Michele Vonci, Yasmin L. Whyatt, Carys Williams, Kevin Mason, David Parker, Eric J. L. McInnes, Nicholas F. Chilton
Summary: EPR spectroscopy is used to show that a t-butyl-pyridyl-functionalised Er-III DOTA derivative coordinates water, while its methylphosphinate analogue does not.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Organic
Atreyee Mishra, Karrera Y. Djoko, Yi-Hsuan Lee, Rianne M. Lord, Grace Kaul, Abdul Akhir, Deepanshi Saxena, Sidharth Chopra, James W. Walton
Summary: We report a series of PEG-substituted pyrithione copper(ii) complexes with significantly increased aqueous solubility. While long PEG chains lead to a decrease in bioactivity, the addition of short PEG chains leads to improved aqueous solubility with retention of activity. One novel complex, [Cu(PyS1)(2)], has particularly impressive anticancer activity, surpassing that of the parent complex.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Davide F. De Rosa, Matthieu Starck, David Parker, Robert Pal
Summary: This article investigates the factors affecting the circularly polarised luminescence (CPL) emission profiles of europium(III)-based CPL emitters. It highlights the importance of solvent polarity, ligand field changes, and the nature of coordinating donor atoms in these complexes. The research shows that these complexes can accurately probe local polarity.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Sangita Das, Lakshman Patra, Partha Pratim Das, Kakali Ghoshal, Saswati Gharami, James W. Walton, Maitree Bhattacharyya, Tapan Kumar Mondal
Summary: A new ratiometric fluorescent probe HQCN was synthesized for the selective detection of hydrazine and hypochlorite ions. The study revealed distinct response characteristics of HQCN towards hydrazine and hypochlorite ions, as observed from fluorescence and UV-Vis spectroscopy. The chemodosimetric experiments demonstrated that HQCN can detect hydrazine and hypochlorite ions at concentrations as low as 10(-8)M. The fluorescence imaging experiments also confirmed the ability of HQCN to monitor the presence of hydrazine and hypochlorite ions in human peripheral blood cells.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Luke J. Williams, Yunas Bhonoah, James W. Walton
Summary: A series of complexes with the general formula [(eta(6)-arene)RuCp][PF6] were synthesized, and the reactivity of the arene ring towards intermolecular nucleophilic aromatic substitution (SNAr) reaction with cyclic 1,3-diones was studied. Competition experiments revealed the leaving group ability of the aryl halides and nitroarenes, with the order of F >> NO2 > Cl > Br. Rapid photolysis reaction freed the arene rings quantitatively after SNAr reaction (<15 min).
CHEMICAL COMMUNICATIONS
(2022)