A5044062594- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Supramolecular Chemistry and Complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Organometallic Complex Synthesis and Catalysis
- Advanced NMR Techniques and Applications
- Quantum Computing Algorithms and Architecture
- Electron Spin Resonance Studies
- Crystallography and molecular interactions
- Lanthanide and Transition Metal Complexes
- Quantum and electron transport phenomena
- Inorganic Chemistry and Materials
- Atomic and Subatomic Physics Research
- Electronic and Structural Properties of Oxides
- Aquatic life and conservation
- Quantum optics and atomic interactions
- Metalloenzymes and iron-sulfur proteins
- Metal complexes synthesis and properties
- Coordination Chemistry and Organometallics
- Covalent Organic Framework Applications
- Protein Hydrolysis and Bioactive Peptides
- Synthesis of heterocyclic compounds
- Food and Agricultural Sciences
- Advanced Memory and Neural Computing
University of Manchester
2015-2024
We report a supramolecule that contains five spins of two different types and with, crucially, predictable interaction energies between the spins. The is characterized, are demonstrated by electron paramagnetic resonance (EPR) spectroscopy. Based on measured parameters, we propose experiments would allow this designed to be used simulate quantum decoherence in maximally entangled Bell states could teleportation.
The lithium silylamides [Li(μ3-NHSiMe2But)]6 (1) and [Li(μ-NHSiPri3)(THF)]2 (2) were reacted with ClSiMe3, ClSiMe2But, or ClSiPri3 to prepare a series of secondary silylamines by salt metathesis reactions. These deprotonated KH afford the group 1 transfer agents [K{μ-N(SiMe2But)(SiMe3)}(C7H8)]2 (3), [{K[μ-N(SiPri3)(SiMe3)]}2]∞ (4), [{K[μ-N(SiMe2But)2]}2(C7H8)]∞ (5), [K{N(SiPri3)(SiMe2But)}]∞ (6), [K{N(SiPri3)2}]∞ (7), [K{N(SiPri3)2}(THF)3] (8). synthetic utility these has been demonstrated...
The implementation of a quantum computer requires both to protect information from environmental noise and implement operations efficiently. Achieving this by fully fault-tolerant platform, in which gates are implemented within quantum-error corrected units, poses stringent requirements on the coherence control such hardware. A more feasible architecture could consist connected memories, that support error-correction enhancing coherence, processing ensure fast manipulations. We present here...
Abstract [2] and [3] hybrid rotaxanes are reported based on {Ti 7 M} rings (M is a trivalent metal such as Fe III or Ga ). NMR studies show that [2]rotaxanes can act molecular shuttles, while EPR of [3]rotaxanes weak interactions between the paramagnetic components supramolecular assemblies.
Both metalloporphyrins and heterometallic {Cr
We report a family of hybrid [2]rotaxanes based on inorganic [Cr7NiF8(O2CtBu)16]− ("{Cr7Ni}") rings templated about organic threads that are terminated at one end with pyridyl groups. These rotaxanes can be coordinated to [Cu(hfac)2] (where Hhfac = 1,1,1,5,5,5-hexafluoroacetylacetone), give 1:1 or 1:2 Cu:{Cr7Ni} adducts: {[Cu(hfac)2](py-CH2NH2CH2CH2Ph)[Cr7NiF8(O2CtBu)16]}, {[Cu(hfac)2][py-CH2NH2CH2CH3][Cr7NiF8(O2CtBu)16]}, {[Cu(hfac)2]([py-CH2CH2NH2CH2C6H4SCH3][Cr7NiF8(O2CtBu)16])2},...
The synthesis, structures, and properties of [4]- [3]-rotaxane complexes are reported where [2]-rotaxanes, formed from heterometallic {Cr7Ni} rings, bound to a fluoride-centered {CrNi2} triangle. compounds have been characterized by single-crystal X-ray diffraction the formulas [CrNi2(F)(O2CtBu)6]{(BH)[Cr7NiF8(O2CtBu)16]}3 (3) [CrNi2(F)(O2CtBu)6(THF)]{(BH)[Cr7NiF8(O2CtBu)16]}2 (4), B = py-CH2CH2NHCH2C6H4SCH3. [4]-rotaxane 3 is an isosceles triangle three [2]-rotaxanes central while 4...
Alkali metal amides are vital reagents in synthetic chemistry and the bis(silyl)amide {N(SiMe₃)₂} (N′′) is one of most widely-utilized examples. Given that N′′ has provided landmark complexes, we have investigated routes to lithium sodium bis(silyl)amides with increased steric bulk analyse effects R-group substitution on structural features. To perform this study, bulky bis(silyl)amines {HN(SitBuMe₂)(SiMe₃)}, {HN(SiiPr₃)(SiMe₃)}, {HN(SitBuMe₂)₂}, {HN(SiiPr₃)(SitBuMe₂)} {HN(SiiPr₃)₂} (1) were...
Abstract A synthetic strategy is demonstrated to prepare two distinct trimers of antiferromagnetically coupled {Cr 7 Ni} rings, substantially varying the magnetic interactions between spin centres. The were studied using multi‐frequency cw EPR: in a trimer linked via non‐covalent H‐bonding no measurable interaction rings was seen, while iso‐ nicotinate groups isotropic and anisotropic exchange +0.42 −0.8 GHz, respectively, observed. latter are same as those for simpler hetero‐dimer system,...
Here we report the synthesis and structural characterization of four [7]rotaxanes formed by coordinating hybrid inorganic-organic [2]rotaxanes to a central {Ni12} core. X-ray single crystal diffraction demonstrate that are formed, with range conformations in crystal. Small angle scattering supported molecular dynamic simulations demonstrates large molecules stable solution also show conformers present not those found Pulsed EPR spectroscopy phase memory times for {Cr7Ni} rings, which have...
Polymer beads have been used as the core of magnetic particles for around twenty years. Here we report studies to attach polymetallic complexes polymer first time, producing 115 microns diameter that are attached 1014 hybrid inorganic-organic [2]rotaxanes. The bead is then formally a [1014] rotaxane. number counted by EPR spectroscopy after including TEMPO radicals within thread
Abstract [2] and [3] hybrid rotaxanes are reported based on {Ti 7 M} rings (M is a trivalent metal such as Fe III or Ga ). NMR studies show that [2]rotaxanes can act molecular shuttles, while EPR of [3]rotaxanes weak interactions between the paramagnetic components supramolecular assemblies.
A finite chain of thirty-one paramagnetic centers is reported, synthesized by reaction hydrated chromium fluoride, copper carbonate and pivalic acid in the presence 1,4,7,10-tetrazacyclododecane (cyclen). Magnetic studies show predominantly anti-ferromagnetic exchange leading to a high density low-lying spin states large saturation field.
Mono- and bis-salen functionalised [2]rotaxanes have been synthesised from the esterification of containing phenol-terminated threads (salen=N,N'-bis(salicylidene)ethylenediamine). The general formula [RH][Cr
We report three new polymers, based on mechanically interlocked inorganic–organic rotaxanes.
The synthesis of a series [4]rotaxanes, each consisting three [2]rotaxanes joined via central {CrNi2} triangular linker, is reported. resultant four [4]rotaxanes were characterized by single crystal X-ray diffraction and electron paramagnetic resonance (EPR) spectroscopy. Orientation-selective 4-pulse double electron–electron (DEER) measurements between the {Cr7Ni} rings incorporated in [4]rotaxane reveal that system conformationally fluxional solution, with most abundant conformations found...
The complex [{Ni(cyclen)}2Cr12NiF18(O2CtBu)24] (where cyclen = 1,4,7,10-tetrazacyclododecane) crystallises as a fifteen-metal chain that is shaped like seahorse. Given this one of the longest finite, paramagnetic chains found, we were intrigued whether unusual structure induced during crystal growth or also maintained in other phases. We report electron resonance spectroscopy, small angle X-ray scattering and atomistic molecular dynamics simulations, demonstrating S-structure from stable...
The complex [{Ni(cyclen)}2Cr12NiF18(O2CtBu)24] (where cyclen = 1,4,7,10-tetrazacyclododecane) crystallises as a fifteen-metal chain that is shaped like seahorse. Given this one of the longest finite, paramagnetic chains found, we were intrigued whether unusual structure induced during crystal growth or also maintained in other phases. We report electron resonance spectroscopy, small angle X-ray scattering and atomistic molecular dynamics simulations, demonstrating S-structure from stable...
Gold(<sc>i</sc>) bridged dimeric and trimeric structures of a ground state spin <italic>S</italic> = 1/2 heterometallic {Cr<sub>7</sub>Ni} wheel have been prepared studied by continuous wave (CW) pulsed EPR spectrometry.
Abstract A finite chain of thirty‐one paramagnetic centers is reported, synthesized by reaction hydrated chromium fluoride, copper carbonate and pivalic acid in the presence 1,4,7,10‐tetrazacyclododecane (cyclen). Magnetic studies show predominantly anti‐ferromagnetic exchange leading to a high density low‐lying spin states large saturation field.