A five-coordinate chloride ion is believed to template the assembly of a pentadecanuclear lanthanide complex europium(III). This cluster (see picture) has been prepared by coordination europium(III) perchlorate with tyrosine at about pH 6. Single crystal X-ray analysis established an unprecedented structure in which 15 constituent ions are organized into three parallel pentagonal layers.

A series of pentadecanuclear lanthanide-hydroxo complexes possessing a common core the formula [Ln15(μ3-OH)20(μ5-X)]24+(1, Ln = Eu, X Cl-; 2, Nd, 3, Gd, 4, Pr, Br-; 5, Br-) were prepared by L-tyrosine-controlled hydrolysis corresponding lanthanide perchlorates in presence added Cl- or Br-. The cationic cluster comprises five vertex-sharing cubane-like [Ln4(μ3-OH)4]8+ units centered on halide template. In case templating I-, dodecanuclear isolated instead. component, [Ln12(μ3-OH)16(I)2]18+...

Abstract Elucidating the effects of crystallization‐induced blue‐shift emission a newly synthesized di‐boron complex (DBC) by enhanced photoluminescence (PL) and electrochemiluminescence (ECL) in annihilation pathway was realized for first time. The 57 nm great enhancement crystalline lattice relative to DBC solution were attributed restriction intramolecular rotation (RIR) confirmed PL imaging, X‐ray diffraction, as well DFT calculations. It discovered that ECL at film/solution interfaces...

Tetranuclear lanthanide-hydroxo complexes of the general formula [Ln(4)(mu(3)-OH)(4)(AA)(x)(H(2)O)(y)](8+) (1, Ln = Sm, AA Gly, x 5, y 11; 2, Nd, Ala, 6, 10; 3, Er, Val, 10) have been prepared by alpha-amino acid controlled hydrolysis lanthanide ions under near physiological pH conditions (pH 6-7). The core component these compounds is a cationic cluster [Ln(4)(mu(3)-OH)(4)](8+) whose constituent and triply bridging hydroxo groups occupy alternate vertexes distorted cube. amino ligands...

New mono- and bimetallic 1,2,3-triazol-5-ylidene mesoionic carbene (MIC) complexes of Pd have been synthesized, isolated, characterized. We described the synthesis a bis(MIC) complex via transmetalation from Ag-MIC two PEPPSI-type which are directly available their respective triazolium salts by treatment with PdCl2 in pyridine. The X-ray structures reported for all herein. Interestingly, each exhibits various secondary noncovalent interactions solid state general type C–H···Cl, appear to be...

New mono- and bidentate 1,2,3-triazol-5-ylidene mesoionic carbene (MIC) ligands have been synthesized reacted with silver oxide, forming cationic 1:2 2:2 Ag:MIC ([AgL2]Br [Ag2L2][Ag2Br4]) complexes, respectively. These complexes isolated characterized. They were further found to be potent transmetalation agents toward rhodium, resulting in the preparation of bimetallic rhodium complexes. The reaction Ag:L complex [Rh(COD)2]BF4 results first reported example a MIC complex. This was fully...

Achieving single-step syntheses of a set related compounds divergently and selectively from common starting material affords substantial efficiency gains when compared with preparing those same by multiple individual syntheses. In order for this approach to be realized, complementary reagent systems must available; here, panel engineered P450BM3 enzymes is shown fulfill remit in the selective C–H hydroxylation cyclobutylamine derivatives at chemically unactivated sites. The oxidations can...

Passivation of the metal surface by dendrons bearing a focal 4-pyridone functionality (the second-generation dendron is shown; C: gray, N: blue, O: red) allows controlled nucleation and growth gold nanoclusters. The particle size direct function generation number dendritic ligands, with higher producing larger particles.

Direct hydrolysis of Er(NO3)3, Nd(ClO4)3, and Gd(ClO4)3 with aqueous NaOH afforded three hexanuclear lanthanide clusters a common octahedral core [Ln6(μ6-O)(μ3-OH)8]8+ whose six ions center on μ6-oxo ligand. Each the triangular faces octahedron is capped by μ3-OH ligand, coordination sphere metal completed both aqua NO3- ligands (1), only (2), ClO4- (3).

Drei Gase, ein Kristall: Rhodium-NHC-Komplexe können aufeinander folgende Einkristall-zu-Einkristall-Umwandlungen unter selektivem und nichtreversiblem Ligandenaustausch eingehen (siehe Bild). Bei langsamer Diffusion von O2 wandelt sich Distickstoffkomplex in einen Disauerstoffkomplex um, aus dem dann durch CO verdrängt werden kann. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They...

We report a comprehensive variable-temperature solid-state (17)O NMR study of three (17)O-labeled crystalline sulfonic acids: 2-aminoethane-1-sulfonic acid (taurine, T), 3-aminopropane-1-sulfonic (homotaurine, HT), and 4-aminobutane-1-sulfonic (ABSA). In the solid state, all compounds exist as zwitterionic structures, NH(3)(+)-R-SO(3)(-), in which SO(3)(-) group is involved various degrees O···H-N hydrogen bonding. High-quality spectra have been obtained for under both static magic angle...

This study assesses supplier selection at the beginning of project management to establish an evaluation system corresponding blockchain tracing anti-counterfeiting platforms (BTAP). First, this paper determines 20 criteria from four dimensions platform overview, core technology, application support, and operations management. On basis, multi-criteria decision making (MCDM) based on customer needs is proposed, which consists three main steps. quality function deployment (QFD) best worst...

Herein, intensified electrochemiluminescence (ECL) and photoluminescence (PL)

When a highway tunnel intersects fault fracture zone, the excavation process disrupts surrounding weak and fragmented rock mass, compromising stability of zone. This study compares deformation stress distribution using reserved core soil method, central diaphragm (CD) cross (CRD) method during through zones. Among these, CRD is identified as safest construction technique. Additionally, to address significant when tunneling zones, impact various pre-support advance reinforcement techniques on...

Two novel tetradecanuclear hydroxo–lanthanide complexes, formulated as Ln14(μ4-OH)2(μ3-OH)16(μ-η2-acac)8(η2-acac)16, Ln = Tb, 1; Eu, 2; acac acetylacetonato, were synthesized and characterized by single-crystal X-ray diffraction, elemental analysis phosphorescence spectroscopy.

Research Article| November 01, 2006 Crystal molds on Mars: Melting of a possible new mineral species to create Martian chaotic terrain Ronald C. Peterson; Peterson 1Department Geological Science and Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar Ruiyao Wang 2Department Chemistry, Author Article Information Publisher: Society America Received: 08 Feb Revision 06 Jun Accepted: 09 First Online: Mar 2017 Online...

The reaction of oxygen with rhodium complexes containing N-heterocyclic carbenes was found to give dioxygen rare square planar geometries and unusually short O−O bond lengths. Analysis the bonding in these by Rh L-edge X-ray absorption spectroscopy (XAS), Raman spectroscopy, DFT calculations provides evidence for a model which singlet is bound Rh(I) d8 metal complex, rather than more common Rh(III) d6 peroxo species octahedral geometry lengths 1.4−1.5 Å range.