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Magnetic Materials

GMR Harddisk, courtesy IBM GermanyMagnetic phenomena are omnipresent in the modern world. The Nobel prize in Physics (2007) was awarded for studies of giant magnetoresistance to A. Fert and P. Grünberg; their discoveries were soon implemented in hard drives (see picture, courtesy of IBM Germany). Learn more about the current research into magnetic materials, basic or applied.

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Recent Articles

Excellent Microwave Absorption and Electromagnetic Interference Shielding Based on Reduced Graphene Oxide@MoS2/Poly(Vinylidene Fluoride) Composites

Excellent Microwave Absorption and Electromagnetic Interference Shielding Based on Reduced Graphene Oxide@MoS2/Poly(Vinylidene Fluoride) Composites

Shields up! Composites of reduced graphene oxide (rGO)@MoS2/poly(vinylidene fluoride) (PVDF) composites have been prepared and investigated (see figure). The composites show superior microwave absorption and excellent electromagnetic interference shielding performances.

[Full Paper]
Ao-Ping Guo, Xiao-Juan Zhang, Shan-Wen Wang, Jia-Qiang Zhu, Lin Yang, Guang-Sheng Wang
ChemPlusChem, September 28, 2016, DOI: 10.1002/cplu.201600370. Read article

Unprecedented “All-in-One” Lanthanide-Doped Mesoporous Silica Frameworks for Fluorescence/MR Imaging and Combination of NIR Light Triggered Chemo-Photodynamic Therapy of Tumors

Unprecedented “All‐in‐One” Lanthanide‐Doped Mesoporous Silica Frameworks for Fluorescence/MR Imaging and Combination of NIR Light Triggered Chemo‐Photodynamic Therapy of Tumors

Unprecedented all-in-one multifunctional lanthanide-doped mesoporous silica frameworks (EuGdOx@MSF) are used for bimodal fluorescence/T1-magnetic resonance (MR) imaging and near infrared (NIR) light-triggered chemo-photodynamic therapy to completely destroy tumors. It is demonstrated that EuGdOx@MSF can sensitize formation of singlet oxygen upon NIR light excitation and exert nanomaterial-mediated photodynamic therapy effects without the need for externally added organic photosensitizers.

[Full Paper]
Poliraju Kalluru, Raviraj Vankayala, Chi-Shiun Chiang, Kuo Chu Hwang
Adv. Funct. Mater., September 26, 2016, DOI: 10.1002/adfm.201603749. Read article

Magnetite-Binding Flagellar Filaments Displaying the MamI Loop Motif

Magnetite‐Binding Flagellar Filaments Displaying the MamI Loop Motif

Magnetic necklace: Mutated flagellar filaments displaying magnetite-binding motifs from magnetosome-associated proteins of magnetotactic bacteria were constructed. These surface-modified filaments were used as templates to capture magnetite nanoparticles from solution, thus directing the formation of magnetic nanofibers.

[Full Paper]
Éva Bereczk-Tompa, Mihály Pósfai, Balázs Tóth, Ferenc Vonderviszt
ChemBioChem, September 22, 2016, DOI: 10.1002/cbic.201600377. Read article

Crystal Growth, Structure, Resistivity, Magnetic, and Photoelectric Properties of One-Dimensional Selenometallate Ba2BiFeSe5

Low-dimensional materials have attracted extensive research interest due to their interesting structural chemistry and physical properties, which will greatly deepen our knowledge in materials and may bring breakthrough in the future.Herein, we synthesized and characterized Ba2BiFeSe5, which adopts quasi-one-dimensional structure and possesses some fascinating physical properties. The sharp divergences between the FC and the ZFC data and the rather small magnetic moment per Fe3+, 0.07 µB, strongly suggest that the title compound is weak ferromagnetic with a high magnetic transition temperature above room temperature, which is rather controlled by competing super exchange interactions within and between [FeBiSe5]∞ anionic ladders. Moreover, with the narrow band gap of 0.95 eV, Ba2BiFeSe5 shows photoelectric property with the photocurrent density of ~30 mA/cm2 at 5 V. Our study demonstrates that Ba2FeBiSe5 may be a new type of multifunctional material that deserves further investigation.

[Full Paper]
Xiaoshuang Li, Xian Zhang, G. Kalai Selvan, S. Arumugam, Fuqiang Huang, Yicheng Wu, Jiyong Yao
Chem. Asian J., September 22, 2016, DOI: 10.1002/asia.201601230. Read article

Orientation-Dependent Thermogenesis of Assembled Magnetic Nanoparticles in the Presence of an Alternating Magnetic Field

Orientation‐Dependent Thermogenesis of Assembled Magnetic Nanoparticles in the Presence of an Alternating Magnetic Field

An assembled film of magnetic nanoparticles is fabricated by the layer-by-layer method as a model to explore orientation-dependent thermogenesis in the presence of an alternating magnetic field. The thermogenesis can be regulated by altering the orientation of the film relative to the field.

[Communication]
Jianfei Sun, Fengguo Fan, Peng Wang, Siyu Ma, Lina Song, Ning Gu
ChemPhysChem, September 21, 2016, DOI: 10.1002/cphc.201600787. Read article

Palladium supported on metformin-functionalized magnetic polymer nanocomposites:A highly efficient and reusable catalyst for the Suzuki-Miyaura coupling reactions

[Full Paper]
Pengbo Yang, Rong Ma, Fengling Bian
ChemCatChem, September 21, 2016, DOI: 10.1002/cctc.201600994. Read article

Divanadium-substituted Phosphotungstates Supported on Magnetic Mesoporous Silica Nanoparticles as Effective and Recyclable Catalyst for Selective Oxidation of Alcohols

[Full Paper]
Xinbo Dong, Xi Zhang, Panfeng Wu, Yanjie Zhang, Bin Liu, Huaiming Hu, Ganglin Xue
ChemCatChem, September 20, 2016, DOI: 10.1002/cctc.201601077. Read article

Magnetically Assembled SERS Substrates Composed of Iron–Silver Nanoparticles Obtained by Laser Ablation in Liquid

Magnetically Assembled SERS Substrates Composed of Iron–Silver Nanoparticles Obtained by Laser Ablation in Liquid

Joining forces: Bimetallic iron–silver nanoparticles (NPs) can be synthesized by laser ablation, with surface-enhanced Raman spectroscopy (SERS) performances, ready responses to magnetic fields, and complete flexibility in surface coating, and used for the magnetic assembly of SERS substrates. Magnetic assembly allows a significant increase in the SERS signal of analytes compared with non-assembled NPs (see figure).

[Article]
Stefano Scaramuzza, Denis Badocco, Paolo Pastore, Diego F. Coral, Marcela B. Fernández van Raap, Vincenzo Amendola
ChemPhysChem, September 15, 2016, DOI: 10.1002/cphc.201600651. Read article

Alignment under Magnetic Field of Mixed Fe2O3/SiO2 Colloidal Mesoporous Particles Induced by Shape Anisotropy

Alignment under Magnetic Field of Mixed Fe2O3/SiO2 Colloidal Mesoporous Particles Induced by Shape Anisotropy

Fe2O3/SiO2 colloidal mesoporous particles with high shape anisotropy are promising building blocks to achieve macroscopically oriented nanocomposites. When dispersed in a solvent, these particles can be easily oriented under magnetic field. Two polymorphs of iron oxide can be stabilized, the superparamagnetic γ phase and the rarest multiferroic ε phase, opening new perspectives for nanocomposites with anisotropic magnetic properties.

[Full Paper]
Jheng-Guang Li, Giulia Fornasieri, Anne Bleuzen, Martí Gich, Alexandre Gloter, Frédéric Bouquet, Marianne Impéror-Clerc
Small, September 14, 2016, DOI: 10.1002/smll.201602272. Read article

Magnetic/Fluorescent Barcodes Based on Cadmium-Free Near-Infrared-Emitting Quantum Dots for Multiplexed Detection

Magnetic/Fluorescent Barcodes Based on Cadmium‐Free Near‐Infrared‐Emitting Quantum Dots for Multiplexed Detection

Magnetic/fluorescent barcodes based on cadmium-free near-infrared-emitting quantum dots(QDs) of CuInS2/ZnS QDs and Fe3O4 magnetic nanoparticles with strong encoding capacity are successfully combined with flow cytometer and one laser for multiplexed assay of tumor markers. Validating experiments also show good performance of the bifunctional barcode-based suspension array when dealing with patient serum samples, indicating their promising applications on multiplexed bioassay.

[Full Paper]
Yuankui Leng, Weijie Wu, Li Li, Kun Lin, Kang Sun, Xiaoyuan Chen, Wanwan Li
Adv. Funct. Mater., September 14, 2016, DOI: 10.1002/adfm.201602900. Read article

Block antiferromagnetism and possible ferroelectricity in KFe2Se2

Block antiferromagnetism and possible ferroelectricity in KFe2Se2

Iron selenides are well-known for unconventional superconductivity. In fact, more interesting physics, e.g. multiferroicity, hides in these non-oxide compounds. Magnetic tetramerization of iron blocks in stoichiometric KFe2Se2 can lead to a prominent magnetostriction effect, which breaks the spatial inversion symmetry and leads to polar Fe–Se layers. This prediction, together with previously studied BaFe2Se3, enrich the magnetoelectric physics of the iron selenide family, going beyond the superconductivity.

[Rapid Research Letter]
Yang Zhang, Huimin Zhang, Yakui Weng, Lingfang Lin, Xiaoyan Yao, Shuai Dong
Phys. Status Solidi RRL, September 13, 2016, DOI: 10.1002/pssr.201600279. Read article

Two Oxime-Based {LnIII3NiII3} Clusters with Triangular {Ln33-O2)}7+ Core: Solvothermal Syntheses, Crystal Structures, and Magnetic Properties

Two Oxime‐Based {LnIII3NiII3} Clusters with Triangular {Ln3(μ3‐O2)}7+ Core: Solvothermal Syntheses, Crystal Structures, and Magnetic Properties

[Article]
Xiao-Ting Wang, Hui-Ming Dong, Xiu-Guang Wang, En-Cui Yang, Xiao-Jun Zhao
Z. anorg. allg. Chem., September 12, 2016, DOI: 10.1002/zaac.201600253. Read article

Optical Biosensors Based on Nitrogen-Doped Graphene Functionalized with Magnetic Nanoparticles

Optical Biosensors Based on Nitrogen‐Doped Graphene Functionalized with Magnetic Nanoparticles

Nitrogen-doped graphene functionalized with magnetic nanoparticles is prepared as the peroxidase-like catalyst for optical detection of hydrogen peroxide and glucose. Excellent sensing performance with high selectivity of the resulting biosensors is obtained.

[Full Paper]
Wenjing Zhang, Chaopeng Chen, Dongxu Yang, Gongxian Dong, Shujuan Jia, Bingxin Zhao, Lu Yan, Qingqing Yao, Anwar Sunna, Yong Liu
Adv. Mater. Interfaces, September 12, 2016, DOI: 10.1002/admi.201600590. Read article

Synthesis of Iron-oxide Palladium Nanoparticles and its catalytic applications for direct coupling of acyl chlorides with alkynes

A new magnetic-silica based palladium nanocatalyst has been synthesized and employed for the first time in the direct coupling of acyl chlorides with terminal alkynes to prepare a variety of ynones. The synthesized nanocomposite was found to be an excellent heterogeneous catalyst for copper-free, phosphine-free, C-C bond formation through Sonogashira reaction under aerobic conditions at room temperature without the use of any additives and inert conditions. The synthesized catalyst has been comprehensively characterized by various techniques such as XRD, SEM, TEM, EDS, XPS, ICP, FT-IR, VSM, AAS, etc. This nanocatalyst can be magnetically recovered and reused up to multiple runs without any noticeable loss in its catalytic activity.

[Full Paper]
Rakesh K. Sharma K Sharma, Manavi Yadav, Rashmi Gaur, Radhika Gupta, Alok Adholeya, Manoj Bhanudas Gawande
ChemPlusChem, September 08, 2016, DOI: 10.1002/cplu.201600321. Read article

Magnetically Propelled Fish-Like Nanoswimmers

Magnetically Propelled Fish‐Like Nanoswimmers

A highly efficient body-deformable nanoswimmer that emulates the body and caudal fin propulsion of fish swimming is developed. The undulatory motion of the nanofish under an oscillating magnetic field allows it to propel in low Reynolds number fluid environments. The new fish-like deformable nanoswimmer holds considerable promise for practical applications, such as targeted drug delivery and lab-on-a-chip devices.

[Full Paper]
Tianlong Li, Jinxing Li, Hongtao Zhang, Xiaocong Chang, Wenping Song, Yanan Hu, Guangbin Shao, Elodie Sandraz, Guangyu Zhang, Longqiu Li, Joseph Wang
Small, September 07, 2016, DOI: 10.1002/smll.201601846. Read article

N-Heterocyclic Carbene (NHC) Adducts of [(C5H5)2Mn] Revisited: Nothing More, Nothing Less than High-Spin (S = 5/2) Molecules!

N‐Heterocyclic Carbene (NHC) Adducts of [(C5H5)2Mn] Revisited: Nothing More, Nothing Less than High‐Spin (S = 5/2) Molecules!

[Article]
Marc D. Walter, Dirk Baabe, Matthias Freytag, Peter G. Jones
Z. anorg. allg. Chem., September 05, 2016, DOI: 10.1002/zaac.201600267. Read article

Silica-Coated Nonstoichiometric Nano Zn-Ferrites for Magnetic Resonance Imaging and Hyperthermia Treatment

Silica‐Coated Nonstoichiometric Nano Zn‐Ferrites for Magnetic Resonance Imaging and Hyperthermia Treatment

Highly magnetic nanoparticles are made by scalable flame aerosol technology combining properties crucial for diagnostics (magnetic resonance imaging) and therapeutics (magnetic hyperthermia). This allows for the simultaneous imaging and treatment of cells while the superior magnetic performance of the nanoparticles drastically reduces their required dose.

[Full Paper]
Fabian H. L. Starsich, Georgios A. Sotiriou, Moritz C. Wurnig, Christian Eberhardt, Ann M. Hirt, Andreas Boss, Sotiris E. Pratsinis
Adv. Healthcare Mater., September 05, 2016, DOI: 10.1002/adhm.201600725. Read article

Oxygen Vacancy Dependence of Magnetic Behavior in the LaAlO3/SrTiO3 Heterostructures

Oxygen Vacancy Dependence of Magnetic Behavior in the LaAlO3/SrTiO3 Heterostructures

The oxygen vacancy dependence of magnetic phenomena demonstrates the correlation between the magnetic properties and the oxygen vacancies. The strong ferromagnetism can be manipulated by controlling the partial pressure of oxygen during the film deposition process. Tuning of magnetism through changing the growth oxygen partial pressure is a feasible strategy in designing magnetic storage and spintronic devices with LaAlO3/SrTiO3 heterostructures.

[Full Paper]
Hai-Long Hu, Lei Ao, Anh Pham, Danyang Wang, Yu Wang, Zhigang Chen, Charlie Kong, Thiam Teck Tan, Xiaotao Zu, Sean Li
Adv. Mater. Interfaces, September 04, 2016, DOI: 10.1002/admi.201600547. Read article

How Ions Arrange in Solution: Detailed Insight from NMR Spectroscopy of Paramagnetic Ion Pairs

How Ions Arrange in Solution: Detailed Insight from NMR Spectroscopy of Paramagnetic Ion Pairs

Pair power: Axially symmetric and anionic bis(phthalocyaninato)TbIII complexes, owing to their large magnetic susceptibility anisotropies, constitute ideal candidates for a solution paramagnetic NMR spectroscopy study of ion pairing with diamagnetic counterions (see figure).

[Article]
Marko Damjanović, Takaumi Morita, Yoji Horii, Keiichi Katoh, Masahiro Yamashita, Markus Enders
ChemPhysChem, September 01, 2016, DOI: 10.1002/cphc.201600804. Read article

One-pot Preparation of Hierarchical Nanosheet-Constructed Fe3O4/MIL-88B(Fe) Magnetic Microspheres with High Efficiency Photocatalytic Degradation of Dye

[Full Paper]
Zhaokui Jin, Wenjun Dong, Mu Yang, Jingjing Wang, Hongyi Gao, Ge Wang
ChemCatChem, August 29, 2016, DOI: 10.1002/cctc.201600952. Read article

Magnetically Alignable Bicelles with Unprecedented Stability Using Tunable Surfactants Derived from Cholic Acid

Five novel surfactants were prepared by modifying the three hydroxy groups of sodium cholate with triethylene glycol chains endcapped with an amide (SC-C1, SC-nC4, and SC-nC5) or a carbamoyl group (SC-OnC4 and SC-OtC4).The phase behavior of aqueous mixtures of these surfactants with 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine (DMPC) was systematically studied by 31P NMR spectroscopy.The surfactants endcapped with carbamate groups (SC-OnC4 and SC-OtC4) formed magnetically alignable bicelles over unprecedentedly wide ranges of conditions, in terms of temperature (from 21-23 to >90 °C), lipid/surfactant ratio (from 5 to 8), total lipid content (5-20 wt%), and lipid type [DMPC, 1,2-dilauroyl-sn-glycero-3-phosphatidylcholine (DLPC), or 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylcholine (POPC)].In conjunction with appropriate phospholipids, the carbamate-endcapped surfactants afforded unique bicelles, characterized by exceptional thermal stabilities (from 0 to >90 °C), biomimetic lipid compositions (DMPC/POPC = 25:75 to 50:50), and extremely large 2H quadrupole splittings (up to 71 Hz).

[Article]
Ryoichi Matsui, Noriyuki Uchida, Masataka Ohtani, Kuniyo Yamada, Arisu Shigeta, Izuru Kawamura, Takuzo Aida, Yasuhiro Ishida
ChemPhysChem, August 24, 2016, DOI: 10.1002/cphc.201600897. Read article

Syntheses, Crystal Structure and Magnetic Properties of an Unprecedented One-Dimensional Coordination Polymer Derived from an {(NiL)2Ln} Node and a Pyrazine Spacer (H2L=N,N′-Bis(salicylidene)-1,3-propanediamine, Ln=Gd, Tb and Dy)

Syntheses, Crystal Structure and Magnetic Properties of an Unprecedented One‐Dimensional Coordination Polymer Derived from an {(NiL)2Ln} Node and a Pyrazine Spacer (H2L=N,N′‐Bis(salicylidene)‐1,3‐propanediamine, Ln=Gd, Tb and Dy)

Rationally designed connectivity between bimetallic trinuclear nodes has been made from transoid-[(NiIIL)2LnIII]3+ tecton (Ln=Gd, Tb, Dy) and pyrazine spacer which form tailored 1D-zigzag coordination polymer. The Gd−Ni ferromagnetic coupling is confirmed. The Ni2Dy compound shows characteristic of SMMs or polymeric aggregates of SMMs under an applied dc field.

[Full Paper]
Soumavo Ghosh, Prithwish Mahapatra, Takuya Kanetomo, Michael G. B. Drew, Takayuki Ishida, Ashutosh Ghosh
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600637. Read article

Temporal Modulation of Stem Cell Activity Using Magnetoactive Hydrogels

Temporal Modulation of Stem Cell Activity Using Magnetoactive Hydrogels

A magnetoactive hydrogel cell culture system is developed and characterized whose mechanical properties can be temporally and reversibly tuned through magnetic fields. Mesenchymal stem cells cultured on this system exhibit changes in morphology, proangiogenic potential, and their osteogenic differentiation potential is dependent on their mechanical history.

[Full Paper]
Amr A. Abdeen, Junmin Lee, N. Ashwin Bharadwaj, Randy H. Ewoldt, Kristopher A. Kilian
Adv. Healthcare Mater., June 08, 2016, DOI: 10.1002/adhm.201600349. Read article

Fluorinated POSS-Star Polymers for 19F MRI

Fluorinated POSS‐Star Polymers for 19F MRI

Novel hybrid star polymers with a polyhedral oligomeric silsesquioxane core and eight partly fluorinated copolymer arms are synthesized through R-group approach by reversible addition–fragmentation chain transfer (RAFT) polymerization. The 19F magnetic resonance imaging (MRI) capability is preliminarily confirmed by a single and strong 19F resonance in 19F nuclear magnetic resonance (NMR), and the imaging intensity is also calculated for a spin-echo pulse sequence.

[Full Paper]
Kewei Wang, Hui Peng, Kristofer J. Thurecht, Andrew K. Whittaker
Macromol. Chem. Phys., May 06, 2016, DOI: 10.1002/macp.201600084. Read article

Expansion of a Discrete [3 × 3] Mn9 Metallogrid to a µ-Carboxylato-Bridged Polymeric {Mn11}n Assembly

Expansion of a Discrete [3 × 3] Mn9 Metallogrid to a µ-Carboxylato-Bridged Polymeric {Mn11}n Assembly

Discrete and polymeric metallogrid compounds based on the [3 × 3] nonamanganese(II) square grid motif and featuring additional manganese(II) ions linked to the grid core were isolated. DC magnetic data show the successful expansion of the grid-type architectures based on tritopic bis(hydrazone) ligands appended with terminal pyruvate groups.

[Full Paper]
Avinash Lakma, Sayed Muktar Hossain, Rabindra Nath Pradhan, Dinesh Topwal, Andrea Cornia, Akhilesh Kumar Singh
Eur. J. Inorg. Chem., April 27, 2016, DOI: 10.1002/ejic.201600153. Read article.

Tuning the Magnetoluminescence Behavior of Lanthanide Complexes Having Sphenocorona and Cubic Coordination Geometries

Tuning the Magnetoluminescence Behavior of Lanthanide Complexes Having Sphenocorona and Cubic Coordination Geometries

LnIII complexes (Ln = Dy, Ho, Tb) with distinctly different coordination geometries, namely, sphenocorona and cubic, are synthesized. The different coordination geometries around the LnIII centers significantly modulate the slow magnetic relaxation and photoluminescence behaviors of the complexes, as revealed from AC magnetic susceptibility and solid-state luminescence studies, respectively.

[Full Paper]
Soumyabrata Goswami, Soumava Biswas, Kapil Tomar, Sanjit Konar
Eur. J. Inorg. Chem., April 26, 2016, DOI: 10.1002/ejic.201600152. Read article.

Synthesis, Characterization, Magnetic Properties, and Topological Aspects of Isoskeletal Heterometallic Hexanuclear CoII4LnIII2 Coordination Clusters Possessing 2,3,4M6–1 Topology

Synthesis, Characterization, Magnetic Properties, and Topological Aspects of Isoskeletal Heterometallic Hexanuclear CoII4LnIII2 Coordination Clusters Possessing 2,3,4M6–1 Topology

The use of a diprotic Schiff base ligand (H2L1) with Co(NO3)2 6H2O and LnCl3 x(H2O) afforded a family of hexanuclear coordination clusters formulated as [CoII4LnIII23-OH)2(L1)4Cl2(NO3)2(MeOH)4] 3(Et2O) where Ln is Y(1), Gd (2), Dy (3), and Tb (4). The topology of these compounds is 2,3,4M61. Compound 3 shows single molecule magnet (SMM) behavior.

[Full Paper]
Kieran Griffiths, Ghenadie Novitchi, George E. Kostakis
Eur. J. Inorg. Chem., April 21, 2016, DOI: 10.1002/ejic.201600078. Read article.

Helical CuICuII3 Metallocavitands with Sulfur-Containing Schiff Base Ligands Exhibiting Ferromagnetic or Antiferromagnetic Interactions

Helical CuICuII3 Metallocavitands with Sulfur-Containing Schiff Base Ligands Exhibiting Ferromagnetic or Antiferromagnetic Interactions

Helical CuICuII3 metallocavitands were created by the one-pot reaction of D-penicillamine, salicylaldehydes, R3N, and CuII. Each metallocavitand is composed of three CuII square planes that form a cyclic wall capped with a CuI trigonal plane, accommodating an R3NH+ ion in its cavity. The magnetic behavior of the metallocavitands was altered by changing a substituent on the ligand.

[Communication]
Asako Igashira-Kamiyama, Masayuki Saito, Shuntaro Kodera, Takumi Konno
Eur. J. Inorg. Chem., April 19, 2016, DOI: 10.1002/ejic.201600290. Read article.

Studies of a Large Odd-Numbered Odd-Electron Metal Ring: Inelastic Neutron Scattering and Muon Spin Relaxation Spectroscopy of Cr8Mn

Studies of a Large Odd-Numbered Odd-Electron Metal Ring: Inelastic Neutron Scattering and Muon Spin Relaxation Spectroscopy of Cr8Mn

Very odd indeed! A new molecular nanomagnet, Cr8Mn, is found to exhibit spin frustration. Inelastic neutron scattering and muon spin relaxation probe the low energy spin dynamics of this compound revealing a ground state that fluctuates in spin chirality.

[Full Paper]
Michael L. Baker, Tom Lancaster, Alessandro Chiesa, Giuseppe Amoretti, Peter J. Baker, Claire Barker, Stephen J. Blundell, Stefano Carretta, David Collison, Hans U. Güdel, Tatiana Guidi, Eric J. L. McInnes, Johannes S. Möller, Hannu Mutka, Jacques Ollivier, Francis L. Pratt, Paolo Santini, Floriana Tuna, Philip L. W. Tregenna-Piggott, Iñigo J. Vitorica-Yrezabal, Grigore A. Timco, Richard E. P. Winpenny
Chem. Eur. J., January 8, 2016, DOI: 10.1002/chem.201503431. Read article.

[U(bipy)4]: A Mistaken Case of U0?

[U(bipy)4]: A Mistaken Case of U0?

U bet your bipy: Lost to time but not forgotten, the first reported and isolable “U0” complex [U(bipy)4] has been synthesized and reinvestigated (see figure). Through a thorough investigation, definitive oxidation state assignments have been made. [U(bipy)4], along with its reduced product [Na(THF)6][U(bipy)4], are revealed to be highly reduced species with U-centers in mid-to-high oxidation states.

[Communication]
Skye Fortier, José Veleta, Amélie Pialat, Jennifer Le Roy, Kamran B. Ghiassi, Marilyn M. Olmstead, Alejandro Metta-Magaña, Muralee Murugesu, Dino Villagrán
Chem. Eur. J., January 7, 2016, DOI: 10.1002/chem.201504982. Read article.

Does the Sign of the Cu–Gd Magnetic Interaction Depend on the Number of Atoms in the Bridge?

Does the Sign of the Cu–Gd Magnetic Interaction Depend on the Number of Atoms in the Bridge?

Bridge over Cu–Gd: Observation of ferromagnetic Cu–Gd exchange interactions through one- and three-atom bridges and of antiferromagnetic Cu–Gd exchange interactions through two-atoms bridges is consistent with an active spin polarization mechanism in Cu–Gd complexes (see figure).

[Full Paper]
Jean-Pierre Costes, Carine Duhayon, Sonia Mallet-Ladeira, Sergiu Shova, Laure Vendier
Chem. Eur. J., January 7, 2016, DOI: 10.1002/chem.201504238. Read article.

Spectroscopic and Computational Investigation of Low-Spin MnIII Bis(scorpionate) Complexes

Spectroscopic and Computational Investigation of Low-Spin MnIII Bis(scorpionate) Complexes

Homoleptic MnIII complexes of the scorpionate Tp and Tp* ligands are rare examples of low-spin MnIII species. The electronic structures of these species were compared using MCD spectroscopy and CASSCF/NEVPT2 computations. Complementary computations for the related [{Ph(MeIm)3B}2MnIII]+ species, which features an NHC ligand, explain variations in zero-field splitting for these complexes.

[Full Paper]
Hannah E. Colmer, Charles G. Margarit, Jeremy M. Smith, Timothy A. Jackson, Joshua Telser
Eur. J. Inorg. Chem., December 23, 2015, DOI: 10.1002/ejic.201501250. Read article.

Homoleptic Two-Coordinate Silylamido Complexes of Chromium(I), Manganese(I), and Cobalt(I)

Homoleptic Two-Coordinate Silylamido Complexes of Chromium(I), Manganese(I), and Cobalt(I)

Amido magnetism: The amido N(SiMe3)2 ligand is shown to stabilise two-coordinate metal(I) complexes for Cr and Co, in a manner similar to that previously reported for the Fe analogue (see figure). In the case of Mn, a dimer with an unsupported Mn-Mn bond was isolated. Quantum chemical calculation provided an electronic and magnetic description of the Cr–Co series.

[Full Paper]
C. Gunnar Werncke, Elizaveta Suturina, Philip C. Bunting, Laure Vendier, Jeffrey R. Long, Mihail Atanasov, Frank Neese, Sylviane Sabo-Etienne, Sébastien Bontemps
Chem. Eur. J., December 18, 2015, DOI: 10.1002/chem.201503980. Read article.

Installation of a Rigid EDTA-Like Motif into a Protein α-Helix for Paramagnetic NMR Spectroscopy with Cobalt(II) Ions

Installation of a Rigid EDTA-Like Motif into a Protein α-Helix for Paramagnetic NMR Spectroscopy with Cobalt(II) Ions

Do not bend: Coupling two copies of an iminodiacetic acid–cysteine hybrid ligand to a pair of cysteine residues positioned in an i, i+4 arrangement within a protein α-helix (see figure) leads to generation of an EDTA-like metal ion-binding motif. Rigid binding of a CoII ion by this motif produces pseudo-contact shifts suitable for paramagnetic NMR structural studies.

[Communication]
James D. Swarbrick, Phuc Ung, Matthew L. Dennis, Michael D. Lee, Sandeep Chhabra, Bim Graham
Chem. Eur. J., December 17, 2015, DOI: 10.1002/chem.201503139. Read article.

Site-Resolved Two-Step Relaxation Process in an Asymmetric Dy2 Single-Molecule Magnet

Site-Resolved Two-Step Relaxation Process in an Asymmetric Dy2 Single-Molecule Magnet

One-to-one correspondence: Employing a new hydrazone ligand resulted in the self-assembly of an asymmetric Dy2 single-molecule magnet (SMM) displaying well-separated two-step relaxation with the anisotropic centers in fine-tuned local environments where the correspondence between the metal sites and the relaxation processes was evidenced (QTM=quantum tunneling of magnetization).

[Full Paper]
Li Zhang , Julie Jung, Peng Zhang, Mei Guo, Lang Zhao, Jinkui Tang, Boris Le Guennic
Chem. Eur. J., December 16, 2015, DOI: 10.1002/chem.201503422. Read article.

Liquid Nickel Salts: Synthesis, Crystal Structure Determination and Electrochemical Synthesis of Nickel Nanoparticles

Liquid Nickel Salts: Synthesis, Crystal Structure Determination and Electrochemical Synthesis of Nickel Nanoparticles

Liquid bunch: Several new liquid nickel (II) salts were synthesized, characterized by XRD and tested for the electroreduction of nickel. Nickel nanoparticles were formed at 100 % selectivity, as was characterized by TEM and SQUID measurements. A mechanism for the electrochemical synthesis of nanoparticles is proposed.

[Full Paper]
Jeroen Sniekers, Ken Verguts, Neil R. Brooks, Stijn Schaltin, Thanh Hai Phan, Thi Mien Trung Huynh, Luc Van Meervelt, Steven De Feyter, Jin Won Seo, Jan Fransaer, Koen Binnemans
Chem. Eur. J., December 8, 2015, DOI: 10.1002/chem.201504123. Read article.

An Experimental and Theoretical Investigation on Pentacoordinated Cobalt(III) Complexes with an Intermediate S=1 Spin State: How Halide Ligands Affect their Magnetic Anisotropy

An Experimental and Theoretical Investigation on Pentacoordinated Cobalt(III) Complexes with an Intermediate S=1 Spin State: How Halide Ligands Affect their Magnetic Anisotropy

Complex magnetism: The factors that control the magnitude and symmetry of the magnetic anisotropy are investigated for a unique series of halide CoIII complexes (see figure), which possess a rare intermediate S=1 spin ground state and remarkably large axial zero-field splitting.

[Full Paper]
Deborah Brazzolotto, Marcello Gennari, Shengying Yu, Jacques Pécaut, Mathieu Rouzières, Rodolphe Clérac, Maylis Orio, Carole Duboc
Chem. Eur. J., November 26, 2015, DOI: 10.1002/chem.201502997. Read article.

© Wiley-VCH 2015.