Search Results - "Lothar Helm"

Inorganic and Bioinorganic Solvent Exchange Mechanisms by Helm, Lothar, Merbach, André E

“…The simplest reaction on a metal ion in aqueous or nonaqueous solution is the exchange of a solvent molecule between the first and second coordination shells…”
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Geometrical confinement of gadolinium-based contrast agents in nanoporous particles enhances T1 contrast by Ananta, Jeyarama S., Godin, Biana, Sethi, Richa, Moriggi, Loick, Liu, Xuewu, Serda, Rita E., Krishnamurthy, Ramkumar, Muthupillai, Raja, Bolskar, Robert D., Helm, Lothar, Ferrari, Mauro, Wilson, Lon J., Decuzzi, Paolo

“…Magnetic resonance imaging contrast agents are currently designed by modifying their structural and physiochemical properties to improve relaxivity and to…”
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Speciation of aqueous tellurium(IV) in hydrothermal solutions and vapors, and the role of oxidized tellurium species in Te transport and gold deposition by Grundler, Pascal V., Brugger, Joël, Etschmann, Barbara E., Helm, Lothar, Liu, Weihua, Spry, Paul G., Tian, Yuan, Testemale, Denis, Pring, Allan

“…Despite the close association between tellurium (Te) and gold (Au) in many epithermal, orogenic, and intrusion-related hydrothermal ore deposits, the…”
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Gd(DOTAlaP): Exploring the Boundaries of Fast Water Exchange in Gadolinium-Based Magnetic Resonance Imaging Contrast Agents by Boros, Eszter, Karimi, Shima, Kenton, Nathaniel, Helm, Lothar, Caravan, Peter

“…Here, we describe the synthesis of the single amino acid chelator DOTAlaP and four of its derivatives. The corresponding gadolinium­(III) complexes were…”
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The Periodic Table and Kinetics? by Lothar Helm, André E. Merbach

“…Mendeleev in his first publication ordered the chemical elements following an apparent periodicity of properties such as atomic volume and valence. The…”
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The challenge of T1 contrast agents for high-magnetic field MRI by Helm, Lothar

“…Magnetic resonance imaging (MRI) is one of the most powerful diagnostic techniques used in clinics. The need for higher spatial resolution and better…”
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Hyperfine Coupling Constants on Inner-Sphere Water Molecules of GdIII-Based MRI Contrast Agents by Esteban-Gómez, David, de Blas, Andrés, Rodríguez-Blas, Teresa, Helm, Lothar, Platas-Iglesias, Carlos

“…Herein we present a theoretical investigation of the hyperfine coupling constants (HFCCs) on the inner‐sphere water molecules of [Gd(H2O)8]3+ and different…”
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Pyridine-Based Lanthanide Complexes Combining MRI and NIR Luminescence Activities by Bonnet, Célia S., Buron, Frédéric, Caillé, Fabien, Shade, Chad M., Drahoš, Bohuslav, Pellegatti, Laurent, Zhang, Jian, Villette, Sandrine, Helm, Lothar, Pichon, Chantal, Suzenet, Franck, Petoud, Stéphane, Tóth, Éva

“…A series of novel triazole derivative pyridine‐based polyamino–polycarboxylate ligands has been synthesized for lanthanide complexation. This versatile…”
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Complexation of [Gd(DTTA–Me)(H2O)2]− by Fluoride and Its Consequences to Water Exchange by Karimi, Shima, Hunter, Gail, Moriggi, Loïck, Platas-Iglesias, Carlos, Helm, Lothar

“…The displacement of water molecule(s) from the inner coordination sphere of [Gd­(DTTA–Me)­(H2O)2]− (DTTA = ethylenetriamine-N,N,N″,N″-tetraacetate) by fluoride…”
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Serum Albumin Targeted, pH-Dependent Magnetic Resonance Relaxation Agents by Moriggi, Loïck, Yaseen, Mohammad A., Helm, Lothar, Caravan, Peter

“…The objective of this work was the synthesis of serum albumin targeted, GdIII‐based magnetic resonance imaging (MRI) contrast agents exhibiting a strong…”
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In-Vivo Detection and Tracking of T Cells in Various Organs in a Melanoma Tumor Model by 19F-Fluorine MRS/MRI by Gonzales, Christine, Yoshihara, Hikari A I, Dilek, Nahzli, Leignadier, Julie, Irving, Melita, Mieville, Pascal, Helm, Lothar, Michielin, Olivier, Schwitter, Juerg

“…19F-MRI and 19F-MRS can identify specific cell types after in-vitro or in-vivo 19F-labeling. Knowledge on the potential to track in-vitro 19F-labeled immune…”
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PEGylated DOTA-AHA-Based GdIII Chelates: A Relaxometric Study by Fontes, André, Karimi, Shima, Helm, Lothar, Ferreira, Paula M., André, João P.

“…Three PEGylated derivatives of 6‐amino‐2‐[4,7,10‐tris(carboxymethyl)‐1,4,7,10‐tetrazacyclododec‐1‐yl]hexanoic acid (DOTA‐AHA) with different molecular weights…”
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Physicochemical Properties of the High-Field MRI-Relevant [Gd(DTTA-Me)(H2O)2]− Complex by Moriggi, Loïck, Cannizzo, Caroline, Prestinari, Cora, Berrière, Florent, Helm, Lothar

“…To study the physicochemical properties of the DTTA chelating moiety (H4DTTA = diethylenetriaminetetraacetic acid =…”
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First Solvation Shell of the Cu(II) Aqua Ion: Evidence for Fivefold Coordination by Pasquarello, Alfredo, Petri, Ingrid, Salmon, Philip S., Parisel, Olivier, Car, Roberto, Tóth, Éva, Powell, D. Hugh, Fischer, Henry E., Helm, Lothar, Merbach, André E.

“…We determined the structure of the hydrated Cu(II) complex by both neutron diffraction and first-principles molecular dynamics. In contrast with the generally…”
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Understanding Paramagnetic Relaxation Phenomena for Water-Soluble Gadofullerenes by Laus, Sabrina, Sitharaman, Balaji, Tóth, Éva, Bolskar, Robert D, Helm, Lothar, Wilson, Lon J, Merbach, André E

“…Water-soluble, endohedral gadofullerenes exhibit considerably higher relaxivities than clinically used Gd3+-chelates and are currently explored as potential…”
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Defect-induced magnetism in graphene by Yazyev, Oleg V., Helm, Lothar

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Isotropic Knight shift of metallic carbon nanotubes by Yazyev, Oleg V., Helm, Lothar

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NMR Study of Ligand Exchange and Electron Self-Exchange between Oxo-Centered Trinuclear Clusters [Fe3(μ3-O)(μ-O2CR)6(4-R′py)3]+/0 by Novitchi, Ghenadie, Helm, Lothar, Anson, Christopher, Powell, Annie K, Merbach, André E

“…The syntheses, single crystal X-ray structures, and magnetic properties of the homometallic μ3-oxo trinuclear clusters [Fe3(μ3-O)(μ-O2CCH3)6(4-Phpy)3](ClO4)…”
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Relaxivity in paramagnetic systems: Theory and mechanisms by Helm, Lothar

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Mechanism of Pyridine−Ligand Exchanges at the Different Labile Sites of 3d Heterometallic and Mixed Valence μ3-oxo Trinuclear Clusters by Novitchi, Ghenadie, Riblet, Fabrice, Scopelliti, Rosario, Helm, Lothar, Gulea, Aurelian, Merbach, André E

“…The syntheses and single crystal X-ray structural analysis of five novel hetero- and homometallic μ3-oxo trinuclear cluster with the formula [FeIII…”
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