Relevant bibliographies by topics / Single Molecule Magnet (SMM)

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  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Single Molecule Magnet (SMM)'

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Published: 22 June 2023

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Journal articles on the topic "Single Molecule Magnet (SMM)"

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Wang, Bing-Wu, Xin-Yi Wang, Hao-Ling Sun, Shang-Da Jiang, and Song Gao. "Evolvement of molecular nanomagnets in China." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371, no. 2000 (2013): 20120316. http://dx.doi.org/10.1098/rsta.2012.0316.

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Molecular nanomagnets have been undergoing development for 20 years since the first single-molecule magnet (SMM), Mn 12 Ac, was characterized as the molecule-behaved magnet. The multi-disciplinary scientists promoted the magnetic characteristics to be more suitable for use in information science and spintronics. The concept of molecular nanomagnets has also evolved to include single-chain magnets (SCMs), single-ion magnets (SIMs) and even magnetic molecules that showed only slow magnetic relaxation, in addition to the initial cluster-type SMMs. In this review, several aspects, including SMMs, SCMs and SIMs, are introduced briefly through some representative examples. In particular, the contribution of Chinese chemists is highlighted in the design, synthesis and understanding of various types of molecular nanomagnets.
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Cosquer, Goulven, Yongbing Shen, Manuel Almeida, and Masahiro Yamashita. "Conducting single-molecule magnet materials." Dalton Transactions 47, no. 23 (2018): 7616–27. http://dx.doi.org/10.1039/c8dt01015c.

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Multifunctional molecular materials exhibiting electrical conductivity and single-molecule magnet (SMM) behaviour are particularly attractive for electronic devices and related applications owing to the interaction between electronic conduction and magnetization of unimolecular units.
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Zhang, Yuan-Zhu, Andrew J. Brown, Yin-Shan Meng, Hao-Ling Sun, and Song Gao. "Linear trinuclear cobalt(ii) single molecule magnet." Dalton Transactions 44, no. 6 (2015): 2865–70. http://dx.doi.org/10.1039/c4dt03545c.

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The first linear trinuclear [Co<sup>II</sup><sub>3</sub>] SMM was achieved due to significant intracluster ferromagnetic coupling. This study shows that miniscule changes in the coordination environment of the cobalt centers in this structural archetype can have a drastic effect on the observation of SMM behavior.
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Liu, Shihao, Yi-Fei Deng, Chang'An Li, Xiaoyong Chang, and Yuan-Zhu Zhang. "A linear trinuclear ferrous single molecule magnet." Dalton Transactions 47, no. 46 (2018): 16704–8. http://dx.doi.org/10.1039/c8dt03410a.

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Then, Poh Ling, Chika Takehara, Yumiko Kataoka, Motohiro Nakano, Tomoo Yamamura, and Takashi Kajiwara. "Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn2 trinuclear complexes." Dalton Transactions 44, no. 41 (2015): 18038–48. http://dx.doi.org/10.1039/c5dt02965a.

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Mitcov, Dmitri, Anders H. Pedersen, Marcel Ceccato, et al. "Molecular multifunctionality preservation upon surface deposition for a chiral single-molecule magnet." Chemical Science 10, no. 10 (2019): 3065–73. http://dx.doi.org/10.1039/c8sc04917c.

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Novitchi, Ghenadie, Jean-Pierre Costes, Jean-Pierre Tuchagues, Laure Vendier, and Wolfgang Wernsdorfer. "A single molecule magnet (SMM) with a helicate structure." New J. Chem. 32, no. 2 (2008): 197–200. http://dx.doi.org/10.1039/b716283a.

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Zhu, Yuan-Yuan, Ting-Ting Yin, Shang-Da Jiang, et al. "The solvent effect in an axially symmetric FeIII4 single-molecule magnet." Chem. Commun. 50, no. 95 (2014): 15090–93. http://dx.doi.org/10.1039/c4cc07580c.

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Tyagi, Pawan, Christopher Riso, Uzma Amir, Carlos Rojas-Dotti, and Jose Martínez-Lillo. "Exploring room-temperature transport of single-molecule magnet-based molecular spintronics devices using the magnetic tunnel junction as a device platform." RSC Advances 10, no. 22 (2020): 13006–15. http://dx.doi.org/10.1039/c9ra09003g.

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Giansiracusa, Marcus J., Susan Al-Badran, Andreas K. Kostopoulos, et al. "A large barrier single-molecule magnet without magnetic memory." Dalton Transactions 48, no. 29 (2019): 10795–98. http://dx.doi.org/10.1039/c9dt01791g.

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Dissertations / Theses on the topic "Single Molecule Magnet (SMM)"

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Athanasopoulou, Angeliki [Verfasser]. "Ln(III) Metallacrown Complexes: Novel Systems and Single-Molecule Magnet (SMM) Properties / Angeliki Athanasopoulou." Mainz : Universitätsbibliothek Mainz, 2019. http://d-nb.info/1189621711/34.

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Goodwin, Conrad. "Synthesis and properties of early metal bulky silylamide complexes." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/synthesis-and-properties-of-early-metal-bulky-silylamide-complexes(72b303fb-67c2-4749-a1fc-ada1f677a844).html.

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Silylamide ligands have been used throughout the Periodic Table since the 1960s. They have delivered landmark complexes by providing the first three co-ordinate f-element complexes, the first trigonal planar f-element complexes and the first near-linear f-element complexes. This area is reviewed in Chapter 2.Herein, this work presents the first uses of several novel bis-silylamide ligands developed at Manchester which take the form {N(SiR3)2} where R = Me, iPr or tBu to afford four novel ligands: N ʹ, {N(SiMe3)(SiiPr3)}; N**, {N(SitBuMe2)2}; N* {N(SitBuMe2)(SiiPr3)}; and N , {N(SiiPr3)2}. Group 1 and 2 complexes of all of these ligands are presented along with the previously reported N*ʹ [N*ʹ = {N(SitBuMe2)(SiMe3)}]; which show variable bonding motifs based on the steric bulk. The N** and N ligands have formed the bulk of the work presented and were used to stabilise the first trigonal planar actinide complex [U(N**)3], as well as the first near-linear Ln(II) (Ln = lanthanide) complexes [Ln(N )2] (Ln = Sm, Eu, Yb, Tm). Additionally the trigonal planar Ln(II) complexes [K(2.2.2-cryptand)][Ln(N**)3] (Ln = Sm, Eu, Yb, Tm) have also been synthesised to compare the physicochemical properties of trigonal planar and near-linear geometries on the same elements with similar ligands.
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Damjanovic, Marko. "13C NMR of a single molecule magnet: analysis of pseudocontact shifts and residual dipolar couplings." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5633/.

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Paramagnetic triple decker complexes of lanthanides are promising Single Molecule Magnets (SMMs), with many potential uses. Some of them show preferable relaxation behavior, which enables the recording of well resolved NMR spectra. These axially symmetric complexes are also strongly magnetically anisotropic, and this property can be described with the axial component of the magnetic susceptibility tensor, χa. For triple decker complexes with phthalocyanine based ligands, the Fermi˗contact contribution is small. Hence, together with the axial symmetry, the experimental chemical shifts in 1H and 13C NMR spectra can be modeled easily by considering pseudocontact and orbital shifts alone. This results in the determination of the χa value, which is also responsible for molecular alignment and consequently for the observation of residual dipolar couplings (RDCs). A detailed analysis of the experimental 1H-13C and 1H-1H couplings revealed that contributions from RDCs (positive and negative) and from dynamic frequency shifts (negative for all observed couplings) have to be considered. Whilst the pseudocontact shifts depend on the average positions of 1H and 13C nuclei relative to the lanthanide ions, the RDCs are related to the mobility of nuclei they correspond to. This phenomenon allows for the measurement of the internal mobility of the various groups in the SMMs.
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Rodriguez, Garrigues Alvar. "Development of an Efficient Molecular Single-Electron Transport Spectroscopy." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5694.

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In this thesis I present a complete and detailed guide for the development process and fabrication of efficient single-electron transistors (SETs) and a better single-molecule magnets (SMMs) deposition yield. Starting from a commercial Si/SiO2 wafer I show the steps for the deposition of different layers to fabricate a SET as well as the improvements achieved in those for a completely functional SET device. The development process is based on a combination of optical lithography and e-beam lithography with metal deposition in ultra-high vacuum. The improvements involve a better conductance in the Al gate component, with a controlled formation of the superficial oxide layer and a faster feedback electromigration-induced breaking of Au nanowires for the creation of nanogaps at room temperature. The gate component is improved by increasing its thickness and exposing it to plasma oxidation for the complete oxidation of its surface. The nanowire breaking is realized at room temperature to make use of the surface tension of Au, which, after a previous feedback procedure, eventually opens the final gap in the nanowire. Finally, I demonstrate a new technique that allows increasing the yield of having a SMM connected in the nanowire gap. This new technique is based on monitoring the resistance of the broken nanowires during the SMM deposition from a controlled liquid solution at room temperature. When the resistance (>G? for open gaps) drops to values below Mega-ohms (characteristic resistance of a molecule bridging the gap) for a number of nanowires in the chip, the device is then ready for low temperature measurements.<br>M.S.<br>Masters<br>Physics<br>Sciences<br>Physics
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Golze, Christian. "Tunable High-Field/ High-Frequency ESR and High-Field Magnetization on Single-Molecule Clusters." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1199739868406-44757.

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In this work, low dimensional iron group clusters have been studied by application of high magnetic fields. The magnetization has been probed with an MPMS as function of temperature and field. The combination with pulse field measurements up to 52\,T allowed determination of the magnetic exchange coupling parameters, and to probing the effective spin of the ground state. The main focus was on tunable high-field/high-frequency (tHF) ESR in static fields &amp;lt; 17 T and pulse field ESR up to 36 T. This magnetic resonance method has been used for the characterization of the local magnetic properties: The detailed analysis of the field dependence of dedicated spin states allowed to determine the magnetic anisotropy and g-factors. The results were analyzed in the framework of the appropriate effective spin Hamiltonians in terms of magnetization fits and ESR spectrum simulations.
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Golze, Christian. "Tunable High-Field/ High-Frequency ESR and High-Field Magnetization on Single-Molecule Clusters." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A24034.

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In this work, low dimensional iron group clusters have been studied by application of high magnetic fields. The magnetization has been probed with an MPMS as function of temperature and field. The combination with pulse field measurements up to 52\,T allowed determination of the magnetic exchange coupling parameters, and to probing the effective spin of the ground state. The main focus was on tunable high-field/high-frequency (tHF) ESR in static fields &amp;lt; 17 T and pulse field ESR up to 36 T. This magnetic resonance method has been used for the characterization of the local magnetic properties: The detailed analysis of the field dependence of dedicated spin states allowed to determine the magnetic anisotropy and g-factors. The results were analyzed in the framework of the appropriate effective spin Hamiltonians in terms of magnetization fits and ESR spectrum simulations.
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Mattei, Carlo Andrea. "Élaboration de complexes de coordination d’ions lanthanides combinant les propriétés de molécule aimante et de luminescence circulairement polarisée." Electronic Thesis or Diss., Rennes 1, 2021. https://ged.univ-rennes1.fr/nuxeo/site/esupversions/f7b00a90-2ab1-411e-b9f9-2e2f43b32f59.

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Des ligands binaphtyle dérivés contenant des groupes donneurs P"=" O ont été utilisés pour la synthèse rationnelle de composés de coordination à propriétés multiples avec des unités M〖(hfac)〗_3. L'oxyde chiral de bisphosphine L a agi comme un ligand chélate donnant des espèces racémiques monomères de formule [〖{Ln(hfac)_3 L}〗_3] (Ln= Eu,Dy and Yb). Ces complexes ont été caractérisés structurellement et leurs propriétés physiques ont été étudiées à l'état solide. Le composé [〖{Eu(hfac)_3 L}〗_3] présentait une luminescence centrée sur le métal. Différemment, le ligand L n'a pas sensibilisé l'émission de luminescence pour [〖{Dy(hfac)_3 L}〗_3]. Cependant, ce dernier affichait un comportement SMM induit par l’application d’un champ magnétique. Le complexe [〖{Yb(hfac)_3 L}〗_3] était un exemple de field-induced SMM chiral et luminescent. Pour les espèces à base de Dy(III)- et Yb(III)-, l'aimantation s'est relâchée via un processus Raman similaire sous l'effet d'un champ magnétique externe. Tous ces composés sont sublimés lorsqu'ils sont chauffés à pression réduite. Ensuite, la chimie de coordination des ligands bisphosphates énantiopurs dérivés du binaphtyle (S)/(R)-L^n (n=1,3) and (S,S,S)/(R,R,R)-L^n (n=2,4) a été étudié. La réaction de ces ligands avec des quantités équimolaires des précurseurs métalliques [M(hfac)_3 (H_2 O)_2] (M=Y,Eu,Dy and Yb) a donné des polymères de coordination monodimensionnel et énantiopurs. Avec les ligands (S)/(R)-L^n (n=1,3), deux espèces polymorphes différentes pourraient être cristallisées en changeant les conditions de réaction et la nature de l'ion métallique. composés à base d’ion Dy(III) ont manifesté un comportement field-induced SMM et une émission de luminescence. La corrélation magnéto-optique et les résultats des calculs ab initio sont présentés. Le complexe 〖[Dy(hfac)_3 {(S)-L^1}]〗_n a montré de contributions multiples de la relaxation d'aimantation malgré la présence d'un seul centre cristallographique de Dy(III). La solubilisation des polymères de coordination 〖[M(hfac)_3 {(S)/(R)-L^1}]〗_n a provoqué une réorganisation structurale en espèces monomères de formule [M(hfac)_3 {(S)/(R)-L^1}]. Ceci a été démontré par spectroscopie NMR et calculs DFT. De manière similaire à l'état solide, le complexe [Dy(hfac)_3 {(S)-L^1}] a présenté un comportement field-induced SMM à plusieurs contributions. Les processus régissant la relaxation d'aimantation de 〖[Dy(hfac)_3 {(S,S,S)-L^2}]〗_n et 〖[Dy〖(hfac)〗_3 {(S)-L^3 }]〗_n ont été étudiés plus en détail en appliquant une stratégie de dilution magnétique et d'enrichissement isotopique avec (_ ^163)Dy(III) (I=1⁄2) et (_ ^164)Dy(III) (I=0). Malgré la minimisation des interactions dipolaires et l'absence de spin nucléaire, une forte dépendance de l'aimantation par le champ a toujours été observée. Les ligands (S)/(R)-L^n (n=1,3) et (S,S,S)/(R,R,R)-L^n (n=2,4) ont sensibilisé efficacement le luminescence des espèces à base d'Eu(III). Leur nature énantiopure a favorisé l'émission de CPL à la fois en solution et à l'état solide. Enfin, le comportement SMM induit par le champ et l'émission de CPL ont été observés dans le même composé en utilisant des centres Yb(III). L'utilisation du ligand L^5 à base de TTF et des unités chirales Yb〖{(R)/(S)"-" facam}〗_3 a donné les dimères énantiopurs 〖[Yb〖{(R)/(S)"-" facam}〗_3 (L^5)]〗_2. Le fragment TTF conférait une activité redox. L'application d'un champ statique modéré a révélé une lente relaxation de l'aimantation. L'excitation directe des états ILCT de L^5 a sensibilisé la luminescence centrée sur le métal. De plus, des émissions NIR-CPL en solution et à l'état solide ont été détectées. Le complexe 〖[Yb〖{(R)/(S)"-" facam}〗_3 (L^5)]〗_2 était un SMM redox induit par champ chiral affichant une émission CPL. Avec les complexes à base d' Yb(III) coordonnés par les ligands (S)/(R)-L^n (n=1,3) et (S,S,S)/(R,R,R)-L^n (n=2,4), ce sont les premiers exemples d'émission NIR-CPL à l'état solide documentés pour les complexes moléculaires<br>Binaphthyl-derived ligands containing P"=" O donor groups were employed for the rational synthesis of multi-properties coordination compounds with M〖(hfac)〗_3 units. The chiral bisphosphine oxide L acted as a chelate ligand giving monomeric racemic species of formula [〖{Ln(hfac)_3 L}〗_3] (Ln= Eu,Dy and Yb). These complexes were structurally characterized and their physical properties were studied in solid state. The compound [〖{Eu(hfac)_3 L}〗_3] exhibited metal-centred luminescence. Conversely, the ligand L was not able to sensitise luminescence emission for [〖{Dy(hfac)_3 L}〗_3]. However, the latter displayed field-induced SMM behaviour. The complex [〖{Yb(hfac)_3 L}〗_3] was an example of a chiral luminescent field-induced SMM. For both Dy(III)- and Yb(III)-based species, the magnetization relaxed via a similar Raman process under the effect of an external magnetic field. All these compounds sublimated when heated at reduced pressure. Subsequently, the coordination chemistry of the enantiopure binaphthyl-derived bisphosphate ligands (S)/(R)-L^n (n=1,3) and (S,S,S)/(R,R,R)-L^n (n=2,4) was studied. Reaction of these ligands with equimolar quantities of the metal precursors [M(hfac)_3 (H_2 O)_2] (M=Y,Eu,Dy and Yb) yielded enantiopure 1D-coordiantion polymers. With ligands (S)/(R)-L^n (n=1,3), two different polymorphic species could be crystallised by changing reaction conditions and nature of the metal ion. The Dy(III)-based compounds manifested field-induced SMM behaviour and luminescence emission. Magneto-optical correlation and results from ab initio calculations are presented. The complex 〖[Dy(hfac)_3 {(S)-L^1}]〗_n showed multiple contributions of the magnetization relaxation despite the presence of a single crystallographic Dy(III) centre. Solubilization of the coordination polymers 〖[M(hfac)_3 {(S)/(R)-L^1}]〗_n caused a structural reorganization to monomeric species of formula [M(hfac)_3 {(S)/(R)-L^1}]. This was demonstrated by NMR spectroscopy and DFT calculations. Similarly to the solid state, complex [Dy(hfac)_3 {(S)-L^1}] exhibited a multi-contribution field-induced SMM behaviour. The processes governing the magnetization relaxation of 〖[Dy(hfac)_3 {(S,S,S)-L^2}]〗_n and 〖[Dy〖(hfac)〗_3 {(S)-L^3 }]〗_n were further investigated by applying a strategy of magnetic dilution and isotopic enrichment with (_ ^163)Dy(III) (I=1⁄2) and (_ ^164)Dy(III) (I=0). Despite the minimisation of the dipolar interactions and the absence of nuclear spin, a strong field dependence of the magnetization was still observed. The ligands (S)/(R)-L^n (n=1,3) and (S,S,S)/(R,R,R)-L^n (n=2,4) efficiently sensitised the luminescence of the Eu(III)-based species. Their enantiopure nature promoted CPL emission in both solution and solid state. Finally, field-induced SMM behaviour and CPL emission were observed in the same compound by employing Yb(III) centres. The use of the functionalized TTF-based ligand L^5 and chiral Yb〖{(R)/(S)"-" facam}〗_3 units gave the enantiopure pair of dimers 〖[Yb〖{(R)/(S)"-" facam}〗_3 (L^5)]〗_2. The TTF fragment conferred redox activity. The application of a moderate static field revealed slow relaxation of the magnetization. Direct excitation of the ILCT states of L^5 sensitised the metal-centred luminescence. Moreover, both solution and solid state NIR-CPL emission were detected. The complex 〖[Yb〖{(R)/(S)"-" facam}〗_3 (L^5)]〗_2 was a redox chiral filed-induced SMM displaying CPL emission. Together with the Yb(III)-based complexes coordinated by the ligands (S)/(R)-L^n (n=1,3) and (S,S,S)/(R,R,R)-L^n (n=2,4), these are the first documented solid state NIR-CPL emissive examples for molecular complexes
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Luo, Guangpu. "Electron Transport via Single Molecule Magnets with Magnetic Anisotropy." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/87532.

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Single molecule magnets (SMMs) are molecules of mesoscopic scale which exhibit quantum properties such as quantum tunneling of magnetization, quantum interference, spin filtering effects, strong spin-phonon coupling and strong hyperfine Stark effects. These effects allow applications of SMMs to high-density information storage, molecular spintronics, and quantum information science. Therefore, SMMs are of interest to physicists, chemists, and engineers. Recently, experimental fabrication of individual SMMs within transistor set-ups have been achieved, offering a new method to examine magnetic properties of individual SMMs. In this thesis, two types of SMMs, specifically Eu2(C8H8)3 and Ni9Te6(PEt3)8, are theoretically investigated by simulating their electron transport properties within three-terminal transistor set-ups. An extended metal atom chain (EMAC) consists of a string of metallic atoms with organic ligands surrounding the string. EMACs are an important research field for nanoelectronics. Homometallic iron-based EMACs are especially attractive due to the high spin and large magnetic anisotropy of iron(II). We explore the exchange coupling of iron atoms in two EMACs: [Fe2(mes)2(dpa)2] and [Fe4(tpda)3Cl2]. Chapter 1 provides an introduction to SMMs, electron transport experiments via SMMs and an introduction to density functional theory (DFT). Chapter 2 presents a theoretical study of electron transport via Eu2(C8H8)3. This type of molecule is interesting since its magnetic anisotropy type changes with oxidation state. The unique magnetic properties lead to spin blockade effects at zero and low bias. In other words, the current through this molecule is completely suppressed until the bias voltage exceeds a certain value. Chapter 3 discusses a theoretical study of electron transport via Ni9Te6(PEt3)8. The magnetic anisotropy of this magnetic cluster has cubic symmetry, which is higher than most SMMs. With appropriate magnetic anisotropy parameters, in the presence of an external magnetic field, uncommon phenomena such as low-bias blockade effects, negative conductance and discontinuous conductance lines, are observed. In Chapter 2 and 3 DFT-calculated magnetic anisotropy parameters are used and electron transport properties are calculated by solving master equations at low temperature. Chapter 4 examines the exchange coupling between iron ions in EMACs [Fe2(mes)2(dpa)2] and [Fe4(tpda)3Cl2]. The exchange coupling constants are calculated by using the least-squares fitting method, based on the DFT-calculated energies from different spin configurations.<br>Ph. D.<br>Single molecule magnets (SMMs) are molecules of mesoscopic scale which exhibit quantum properties. Its quantum effects are used to describe the behavior of SMMs at the smallest scales. These quantum properties could also be used to reveal possible applications of SMMs to high-density information storage, molecular spintronics, and quantum information science. Thus SMMs are of interest to physicists, chemists, and engineers. Recently, electron transport via individual SMMs was achieved in experiments. Electron transport is obviously affected by the magnetic properties of the SMM, thus one can examine magnetic properties of an SMM indirectly by measuring electron transport via the SMM. In this thesis, two types of SMMs, Eu2(C8H8)3 and Ni9Te6(PEt3)8, are investigated theoretically by simulating their electron transport properties. An extended metal atom chain (EMAC) consists of a string of metallic atoms with organic ligands surrounding the string. EMACs are an important research field for nanoelectronics. Homometallic iron-based EMACs are especially attractive due to the high spin and large magnetic anisotropy of iron(II). If a molecule has magnetic anisotropy, its magnetic properties change with the direction of its magnetic moment. We explore how iron atoms interact with each other in the EMACs [Fe2(mes)2(dpa)2] and [Fe4(tpda)3Cl2]. Chapter 1 provides an introduction to SMMs, electron transport experiments via SMMs and an approximation method, density functional theory (DFT). DFT is a method to approximate electronic structure and magnetic properties of various many-body systems. Chapter 2 investigates theoretical electron transport via Eu2(C8H8)3. Eu2(C8H8)3 changes its type of magnetic anisotropy when it obtains an extra electron, which is different from most SMMs. If the Eu2(C8H8)3 is short of an extra electron, its magnetization direction is in-plane, that is, its magnetic energy is lowest when its magnetic moment is along any direction in a specific plane. If an extra electron is captured by Eu2(C8H8)3, its magnetization direction becomes out-of-plane, and its lowest energy is obtained when its magnetic moment is along the direction normal to the specific plane. The unique magnetic properties lead to blockade effects at low bias: the current through this molecule is completely suppressed until the bias voltage exceeds a certain value. The bias voltage on a molecule equals the electrical potential difference between two ends of the molecule. Chapter 3 investigates theoretical electron transport via Ni9Te6(PEt3)8. Magnetic anisotropy of Ni9Te6(PEt3)8 is cubic symmetric, and its symmetry is higher than most SMMs. With appropriate magnetic anisotropy parameters, in the presence of an external magnetic field, uncommon phenomena are observed. These phenomena include (1) current is completely suppressed when bias is low; (2) current via SMM decreases while bias on SMM increases; (3) there are discontinuous lines in the figures that describe electrical conductance of current. Chapter 4 examines the iron atoms’ interaction strength in both [Fe2(mes)2(dpa)2] and [Fe4(tpda)3Cl2]. Reasonable spin Hamiltonians are used to describe the energy of EMACs. Considering all possible directions of the spins of iron atoms in two EMACs, we calculate the energy of every possible spin configuration using DFT. The energy of each spin configuration can be expressed as an equation containing one or more coupling constants. We apply the least-squares fitting method to obtain the values of the coupling constants in the spin Hamiltonians.
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King, Sara. "Synthesis and characterisation of lanthanide complexes as possible single-molecule magnets." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/synthesis-and-characterisation-of-lanthanide-complexes-as-possible-singlemolecule-magnets(b711d937-0dd1-4468-8514-1b3dce56be18).html.

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A range of lanthanide compounds incorporating soft bridging ligands or alkoxide ligands have been synthesised and their magnetic properties investigated. These two classes of compound have shown promise as single molecule magnets but have not been widely studied; this thesis aims to expand on this area of research. Softer bridging ligands are found to slightly increase superexchange interactions between metal centres compared to harder bridging ligands. The introduction to this thesis covers the basic properties of the lanthanides, paying special attention to their chemistry with soft donor ligands and alkoxide ligands. Also included is an introduction to the field of single-molecule magnetism and the role of lanthanide complexes in the study of this behaviour. In Chapter 2, four complexes are reported: the phosphine adducts [Cp'3Ln(H2PMes)] and the phosphide-bridged trimers [(Cp'2)Ln(μ-PHMes)]3 (Ln = Er, Gd). Their structures and magnetic properties are characterised. In Chapter 3, the novel dodecametallic thiolate-bridged lanthanide macrocycles [(Cp'2Ln)3({μ-SCH2}3CMe)]4 (Ln = Dy, Y, Gd) are reported and characterised by X-ray crystallography, NMR spectroscopy and magnetometry. [(Cp'2Dy)3({μ-SCH2}3CMe)]4 is shown to be a single-molecule magnet with Ueff = 69 cm-1. In Chapter 4, the novel thiolate-bridged lanthanide dimers [Cp'2Ln(μ-SCH2{C4H7S2})]2 (Ln = Dy, Y, Gd) are reported, showing sulfur-sulfur bonding leading to ring cyclisation of the bridging ligand [MeC(CH2S)3]3-. These complexes are characterised by X-ray crystallography, NMR spectroscopy and magnetometry. Extra NMR spectroscopic studies were performed to investigate the mechanism of ring closure on the bridging ligand. [Cp'2Dy(μ-SCH2{C4H7S2})]2 is shown to be a single-molecule magnet with Ueff = 87 cm-1. In Chapter 5, four new lanthanide siloxide clusters incorporating alkali metals are reported: the trigonal bipyramidal [Dy2K3(OSiMe3)9]; the octahedral [Dy2K4(OSiMe3)10]; the bi-capped cuboid [Y4K6O6(OSiMe3)12]6-; and the [Dy3K8O3(OSiMe3)12]- 'burger' cluster. All clusters are structurally characterised by X-ray crystallography and [Dy2K4(OSiMe3)10] is magnetically characterised. The synthetic rationalisation for formation of these diverse structures is investigated.
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Vongtragool, Suriyakan. "Frequency-domain magnetic resonance spectroscopy on the Mn12-acetate single-molecule magnet." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972905952.

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Books on the topic "Single Molecule Magnet (SMM)"

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Wernsdorfer, W. Molecular nanomagnets. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.4.

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This article describes the quantum phenomena observed in molecular nanomagnets. Molecular nanomagnets, or single-molecule magnets (SMMs), provides a fundamental link between spintronics and molecular electronics. SMMs combine the classic macroscale properties of a magnet with the quantum properties of a nanoscale entity. The resulting field, molecular spintronics, aims at manipulating spins and charges in electronic devices containing one or more molecules. This article first considers molecular nanomagnets and the giant spin model for nanomagnets before discussing the quantum dynamics of a dimer of nanomagnets, resonant photon absorption in Cr7Ni antiferromagnetic rings, and photon-assisted tunnelling in a single-molecule magnet. It also examines environmental decoherence effects in nanomagnets and concludes by highlighting the new trends towards molecular spintronics using junctions and nano-SQUIDs.
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Appasani, Krishnarao, and Raghu Kiran Appasani, eds. Single-Molecule Science. Cambridge University Press, 2022. http://dx.doi.org/10.1017/9781108525909.

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Single Molecule Science (SMS) has emerged from developing, using and combining technologies such as super-resolution microscopy, atomic force microscopy, and optical and magnetic tweezers, alongside sophisticated computational and modelling techniques. This comprehensive, edited volume brings together authoritative overviews of these methods from a biological perspective, and highlights how they can be used to observe and track individual molecules and monitor molecular interactions in living cells. Pioneers in this fast-moving field cover topics such as single molecule optical maps, nanomachines, and protein folding and dynamics. A particular emphasis is also given to mapping DNA molecules for diagnostic purposes, and the study of gene expression. With numerous illustrations, this book reveals how SMS has presented us with a new way of understanding life processes. A must-have for researchers and graduate students, as well as those working in industry, primarily in the areas of biophysics, biological imaging, genomics and structural biology.
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Thiele, Stefan. Read-Out and Coherent Manipulation of an Isolated Nuclear Spin: Using a Single-Molecule Magnet Spin-Transistor. Springer, 2019.

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Thiele, Stefan. Read-Out and Coherent Manipulation of an Isolated Nuclear Spin: Using a Single-Molecule Magnet Spin-Transistor. Springer, 2015.

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Thiele, Stefan. Read-Out and Coherent Manipulation of an Isolated Nuclear Spin: Using a Single-Molecule Magnet Spin-Transistor. Springer, 2015.

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Book chapters on the topic "Single Molecule Magnet (SMM)"

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Thiele, Stefan. "Single-Molecule Magnet Spin-Transistor." In Read-Out and Coherent Manipulation of an Isolated Nuclear Spin. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-24058-9_5.

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Komeda, Tadahiro, Keiichi Katoh, and Masahiro Yamashita. "Single Molecule Magnet for Quantum Information Process'." In Molecular Technology. Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527823987.vol3_c11.

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Pedersen, Kasper S., Daniel N. Woodruff, Jesper Bendix, and Rodolphe Clérac. "Experimental Aspects of Lanthanide Single-Molecule Magnet Physics." In Lanthanides and Actinides in Molecular Magnetism. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527673476.ch5.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of Mn12 single-molecule magnet with thiophenecarboxylate bridges." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 1. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62478-4_236.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of tetraphenylphosphonium salt of Mn12 single-molecule magnet with thiophenecarboxylate bridges." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 1. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62478-4_234.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of hybridized complex of Mn2III single molecule magnet and nickel thiolate complex." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 7. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65895-6_83.

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Ostrovsky, S., O. Reu, A. Palii, et al. "A Model of Single Molecule Magnet Behavior of the [CuIILTbIII(hfac)2]2 Cluster." In Diffusion in Solids and Liquids III. Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-51-5.227.

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"Single Ion Magnet (SIM)." In Introduction to Molecular Magnetism. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527690541.ch13.

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"Single Chain Magnets (SCM) and More." In Introduction to Molecular Magnetism. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527690541.ch15.

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"The Single Molecule Magnets Mn12 and Fe8." In Computer Based Projects for a Chemistry Curriculum, edited by Thomas J. Manning and Aurora P. Gramatges. BENTHAM SCIENCE PUBLISHERS, 2013. http://dx.doi.org/10.2174/9781608051939113010016.

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In this exercise students will review a number of fundamental concepts including molecular geometry, electron configurations, magnetism, metal-ligand interactions, and material science. Students will use molecular modelling software to build, visualize and study a cutting edge material (single molecule magnet).
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Conference papers on the topic "Single Molecule Magnet (SMM)"

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Noor, Shabana, Sarvendra Kumar, and Suhail Sabir. "Design and synthesis of heterometallic [CuII-DyIII] compounds: single molecule magnet (SMM) properties." In Proceedings of the International Conference on Nanotechnology for Better Living. Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-09-7519-7nbl16-rps-4.

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Barker, Alex J., Brant Cage, Stephen Russek, Ruchira Garg, Robin Shandas, and Conrad R. Stoldt. "Tailored Nanoscale Contrast Agents for Magnetic Resonance Imaging." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81503.

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Two potential molecular imaging vectors are investigated for material properties and magnetic resonance imaging (MRI) contrast improvement. Monodisperse magnetite (Fe3O4) nanocrystals ranging in size from 7 to 22 nm are solvothermally synthesized by thermolysis of Fe(III) acetylacetonate (Fe(AcAc)3) both with and without the use of heptanoic acid (HA) as a capping ligand. For the resulting Fe3O4 nanocrystals, X-Ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and superconducting quantum interference device magnetometry (SQUID) is used to identify the average particle size, monodispersity, crystal symmetry, and magnetic properties of the ensembles as a function of time. The characterization study indicates that the HA synthesis route at 3 hours produced nanoparticles with the greatest magnetic anisotropy (15.8 × 104 J/m3). The feasibility of Fe8 single molecule magnets (SMMs) as a potential MRI contrast agent is also examined. SQUID magnetization measurements are used to determine anisotropy and saturation of the potential agents. The effectiveness of the Fe3O4 nanocrystals and Fe8 as potential MRI molecular probes is evaluated by MRI contrast improvement using 1.5 mL phantoms dispersed in de-ionized water. Results indicate that the magnetically optimized Fe3O4 nanocrystals and Fe8 SMMs hold promise for use as contrast agents based on the reported MRI images and solution phase T1/T2 shortening.
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Lawrence, J., S. C. Lee, S. Kim, S. Hill, M. Murugesu, and G. Christou. "Magnetic Quantum Tunneling in a Mn12 Single-Molecule Magnet Measured With High Frequency Electron Paramagnetic Resonance." In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. AIP, 2006. http://dx.doi.org/10.1063/1.2355102.

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