Regioselective Coordination toward Silver(I) Ions by Bis- and Tris(Tetra-Armed Cyclen)s via Differential Electron Density of Aromatic Side Arms.

Four types of bis- and tris(tetra-armed cyclen)s were prepared. is a bis(tetra-armed cyclen) with electron-rich side arms (three 4-methoxybenzyl groups) and electron-deficient side arms (three 3,5-difluorobenzyl groups), connected by a 4,4'-dimethyl-1,1'-biphenyl moiety. is a tris(tetra-armed cyclen) with 4-methoxybenzyl and 3,5-difluorobenzyl groups introduced on both ends and the central cyclen, respectively.

Unexpected Solvent-Dependent Self-Assembly of Alkali Metal Complexes of Calix[6]--crown-4: Dinuclear Bowls, a Pseudo-Capsule, and a One-Dimensional Polymer.

1,4-Bridged calix[6]--crown-4 (H) capable of metal binding was employed, and the influence of solvent variations on the formation of alkali metal complexes (-) was investigated. In the crystal, the bowl-shaped H host contains one water molecule in a good-fit fashion via H-bonds. When the H host was reacted with alkali metal hydroxides (M = Na, K, Rb, and Cs) in chloroform/methanol (solvent A), anion-free dinuclear bowl-shaped complexes of type [M(H)] were isolated regardless of the metal ions.

Universal Unitary Transfer of Continuous-Variable Quantum States into a Few Qubits.

We present a protocol for transferring arbitrary continuous-variable quantum states into a few discrete-variable qubits and back. The protocol is deterministic and utilizes only two-mode Rabi-type interactions that are readily available in trapped-ion and superconducting circuit platforms. The inevitable errors caused by transferring an infinite-dimensional state into a finite-dimensional register are suppressed exponentially with the number of qubits.

Influence of the Reaction Sequence on the Complexation of an NS-Macrocycle with Cd and Cu Salts Leading to the Formation of Supramolecular Isomers and an Endo/Exocyclic Cu Complex.

In the construction of metallosupramolecules, the reaction sequence in a three-reactant system (one ligand plus two metal ions) could be one of the controlling factors influencing the outcome of the reaction. In this work, the formation of supramolecular isomers ( and ) and an endo/exocyclic Cu complex () of the NS-macrocycle () via different sequential metal addition protocols (routes I-III) is reported. In one-pot reactions of with Cu(CHCN)PF in the absence (route I) and presence (route II) of CdI, a cyclic dimer Cu complex, [Cu()](PF) (), and a one-dimensional coordination polymer, [Cu()]·[CdI] (), were obtained, respectively.

Unconditional Preparation of Squeezed Vacuum from Rabi Interactions.

Squeezed states of harmonic oscillators are a central resource for continuous-variable quantum sensing, computation, and communication. Here, we propose a method for the generation of very good approximations to highly squeezed vacuum states with low excess antisqueezing using only a few oscillator-qubit coupling gates through a Rabi-type interaction Hamiltonian. This interaction can be implemented with several different methods, which has previously been demonstrated in superconducting circuit and trapped-ion platforms.

Synthesis, crystal structure and photophysical properties of chlorido-[2-(2',6'-di-fluoro-2,3'-bipyri-din-6-yl-κ )-6-(pyridin-2-yl-oxy-κ)phenyl-κ ]platinum(II).

The title compound, [Pt(CHFNO)Cl], crystallizes with two crystallographically independent mol-ecules ( and ) in the asymmetric unit, which adopt similar conformations. The Pt atoms in both mol-ecules adopt distorted square-planar geometries, coordinated by one C and two N atoms from the tridentate 2',6'-di-fluoro-6-[3-(pyridin-2-yl-oxy)phen-yl]-2,3'-bi-pyridine ligand and a chloride anion: the C and Cl atoms are . In the crystal, C-H⋯Cl/F hydrogen bonds, F⋯π and weak π-π stacking inter-actions between adjacent and mol-ecules and between pairs of inversion-related B mol-ecules lead to the formation of a two-dimensional supra-molecular network lying parallel to the plane.

Incorporation of Lithium Fluoride Restraining Thermal Degradation and Photodegradation of Organometal Halide Perovskite Solar Cells.

Because of the facile formation of defects in organometal halide perovskites, the defect passivation has become an important prerequisite for the stable and efficient perovskite solar cell (PSC). Regarding that ionic defects of the perovskites play a significant role on the performance and stability of PSCs, we introduce lithium fluorides as effective passivators based on their strong ionic characteristics and small ionic radii. Both Li and F are observed to successfully incorporate within the perovskite layer, improving the device performances with the best efficiency over 20%, while the hysteresis effects are significantly reduced, confirming the passivation of perovskite defects.

Pentacyclic Nano-Trefoil.

Tetra-armed cyclen (1) bearing two 4-(4'-pyridyl)benzyl and two 3,5-difluorobenzyl groups and its Ag complexes were prepared and structurally characterized. The complexes formed between 1 and Ag undergoes a reversible structural transformation between a 2:2 dimeric complex and a 3:5 pentacyclic trefoil complex with changes in the Ag /1 molar ratio. It was also revealed that the 3:5 trefoil complex could encapsulate benzene and [D ]benzene selectively in solid-state.

CuCrO Nanoparticles Incorporated into PTAA as a Hole Transport Layer for 85 °C and Light Stabilities in Perovskite Solar Cells.

High-mobility inorganic CuCrO nanoparticles are co-utilized with conventional poly(bis(4-phenyl)(2,5,6-trimethylphenyl)amine) (PTAA) as a hole transport layer (HTL) for perovskite solar cells to improve device performance and long-term stability. Even though CuCrO nanoparticles can be readily synthesized by hydrothermal reaction, it is difficult to form a uniform HTL with CuCrO alone due to the severe agglomeration of nanoparticles. Herein, both CuCrO nanoparticles and PTAA are sequentially deposited on perovskite by a simple spin-coating process, forming uniform HTL with excellent coverage.

Crystal structure and luminescence properties of 2-[(2',6'-dimeth-oxy-2,3'-bipyridin-6-yl)-oxy]-9-(pyridin-2-yl)-9-carbazole.

In the title com-pound, CHNO, the carbazole system forms a dihedral angle of 68.45 (3)° with the mean plane of the bi-pyridine ring system. The bi-pyridine ring system, with two meth-oxy substituents, is approximately planar (r.

Crystal structure and Hirshfeld surface analysis of 2,2''',6,6'''-tetra-meth-oxy-3,2':5',3'':6'',3'''-quaterpyridine.

In the title compound, CHNO, the four pyridine rings are tilted slightly with respect to each other. The dihedral angles between the inner and outer pyridine rings are 12.51 (8) and 9.

Bipyridine-based iridium(iii) triplet emitters for organic light-emitting diodes (OLEDs): application and impact of phenyl substitution at the 5'-position of the N-coordinating pyridine ring.

Three blue phosphorescent homoleptic iridium(iii) complexes based on a bipyridine ligand were synthesized. The structures of these Ir(C^N)3 analogues were determined by single-crystal X-ray diffraction analysis. Two geometrical isomers, facial and meridional, formed as the major products, and the ratio of the products depended on the substituents.

Crystal structure and Hirshfeld surface analysis of 1,2-bis-(2',6'-diisoprop-oxy-[2,3'-bipyridin]-6-yl)benzene.

The title mol-ecule, CHNO, displays a helical structure induced by the combination of the C-C-C-C torsion angle [-10.8 (2)°] between two 2,3'-bipyridyl units attached to the 1,2-positions of the central benzene ring and consecutive connections between five aromatic rings through the - and -positions. Intra-molecular C-H⋯π inter-actions between an H atom of a pyridine ring and the centroid of a another pyridine ring contributes to the stabilization of the helical structure.

Crystal structure of 2,3'-bi-pyridine-2',6'-dicarbo-nitrile.

The title compound, CHN, crystallizes with four independent mol-ecules (, , and ) in the asymmetric unit. The dihedral angles between the two pyridine rings in each mol-ecule are 25.25 (8)° in , 5.

Crystal structure and luminescent properties of bis-[2,6-dimethyl-3-(pyridin-2-yl-κ)pyridin-4-yl-κ](2,2,6,6-tetra-methylhepta-ne-3,5-dionato-κ,')iridium(III) ethyl acetate monosolvate.

In the solvated title compound, [Ir(CHN)(CHO)]·CHCOCH, the Ir ion adopts a distorted octa-hedral coordination environment resulting from its coordination by two ,-chelating 2,6-dimethyl-3-(pyridin-2-yl)pyridin-4-yl ligands and one ,-chelating 2,2,6,6-tetra-methylhepta-ne-3,5-dionate ligand. The ,-chelating ligands are perpendicular to each other [dihedral angle between the least-squares planes = 87.86 (5)°] and are arranged in a -, and -, fashion.

Optimum Morphology of Mixed-Olivine Mesocrystals for a Li-Ion Battery.

In this present work, we report on the synthesis of micron-sized LiMnFePO (LMFP) mesocrystals via a solvothermal method with varying pH and precursor ratios. The morphologies of resultant LMFP secondary particles are classified into two major classes, flakes and ellipsoids, both of which are featured by the mesocrystalline aggregates where the primary particles constituting LMFP secondary particles are crystallographically aligned. Assessment of the battery performance reveals that the flake-shaped LMFP mesocrystals exhibit a specific capacity and rate capability superior to those of other mesocrystals.

Crystal structure of -tris-{2,6-di-fluoro-3-[5-(2-fluoro-phen-yl)pyridin-2-yl-κ]pyridin-4-yl-κ}iridium(III) di-chloro-methane hemisolvate -hexane hemisolvate.

The asymmetric unit of the title compound, [Ir(CHFN)]·0.5CH(CH)CH·0.5CHCl, comprises one Ir atom, three 2,6-di-fluoro-3-[5-(2-fluoro-phen-yl)pyridin-2-yl]pyridin-4-yl ligands and half each of an -hexane and a di-chloro-methane solvent mol-ecule located about crystallographic inversion centres.

Crystal structure of a zigzag Co coordination polymer: -poly[[di-chlorido-bis-(methanol-κ)cobalt(II)]-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ:'].

Reaction of bis-(pyridin-3-ylmeth-yl)sulfane () with cobalt(II) chloride in methanol led to the formation of the title coordination polymer, [CoCl(CHNS)(CHOH)] , in which the Co cation lies on a crystallographic inversion centre and the S atom of the ligand lies on a twofold rotation axis. Each Co ion is coordinated by two pyridine N atoms from two bridging ligands, two O atoms from methanol mol-ecules and two chloride anions, all inversion-related. The complex unit has an elongated octa-hedral geometry, in which NO donor atoms occupy the equatorial positions and two chloride anions occupy the axial positions.

A one-dimensional Hg coordination polymer based on bis-(pyridin-3-ylmeth-yl)sulfane.

The reaction of mercury(II) chloride with bis-(pyridin-3-ylmeth-yl)sulfane (, CHNS) in methanol afforded the title crystalline coordination polymer -poly[[di-chlorido-mercury(II)]-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ:'], [HgCl] . The asymmetric unit consists of one Hg cation, one ligand and two chloride anions. Each Hg ion is coordinated by two pyridine N atoms from separate ligands and two chloride anions.

Crystal structure of a twisted-ribbon type double-stranded Ag coordination polymer: -poly[[silver(I)-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ:':] nitrate].

The asymmetric unit in the title compound, {[Ag(CHNS)]·NO} or {[Ag]·NO} , = bis-(pyridin-3-ylmeth-yl)sulfane, consists of an Ag cation bound to a pyridine N atom of an ligand and an NO anion that is disordered over two orientations in an 0.570 (17):0.430 (17) occupancy ratio.

Crystal structure of an Ag inter-calation compound: -poly[[silver(I)-μ--(pyridin-3-ylmeth-yl)pyridin-3-amine-κ:'] hexa-fluorido-phosphate aceto-nitrile disolvate].

The asymmetric unit in the title compound, [Ag(CHN)]PF·2CHCN or {[Ag]·PF·2CHCN} , = -(pyridin-3-ylmeth-yl)pyridin-3-amine, comprises one Ag atom, one ligand, two aceto-nitrile solvent mol-ecules and one PF anion disordered over two orientations in a 0.567 (11):0.433 (11) ratio.

Crystal structure of a looped-chain Co coordination polymer: -poly[[bis-(nitrato-κ)cobalt(II)]bis-[μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ:']].

The asymmetric unit of the title compound, [Co(NO)(CHNS)] , contains a bis-(pyridin-3-ylmeth-yl)sulfane () ligand, an NO anion and half a Co cation, which lies on an inversion centre. The Co cation is six-coordinated, being bound to four pyridine N atoms from four symmetry-related ligands. The remaining coordination sites are occupied by two O atoms from two symmetry-related nitrate anions in a monodentate manner.

Crystal structure of a Co coordination polymer with a dipyridyl ligand: -poly[[bis-(nitrato-κ,')cobalt(II)]-μ--(pyridin-2-ylmeth-yl)pyridine-3-amine-κ,':''].

The asymmetric unit of the title compound, [Co(NO)] , = -(pyridine-2-ylmeth-yl)pyridine-3-amine (CHN), contains one Co centre, two nitrate anions and one ligand in which the C-C-N-C moiety adopts a conformation with a torsion angle of -173.1 (3) Å. The coordination geometry of the Co atom is a distorted penta-gonal bipyramid.

Qubit-mediated deterministic nonlinear gates for quantum oscillators.

Quantum nonlinear operations for harmonic oscillator systems play a key role in the development of analog quantum simulators and computers. Since strong highly nonlinear operations are often unavailable in the existing physical systems, it is a common practice to approximate them by using conditional measurement-induced methods. The conditional approach has several drawbacks, the most severe of which is the exponentially decreasing success rate of the strong and complex nonlinear operations.