Some scientific research about (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

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Blue luminescent zinc(II) complexes with polypyridylamine ligands: Crystal structures and luminescence properties

A series of blue luminescent zinc(II) complexes, [Zn(dpa)X2] [dpa = di-2-pyridylamine, X = OAc 1a, Cl 1b, CN 1c or 4-MeC6H4S 1d], [Zn(dpa)2][CF3SO3]2 2, [Zn(tpda)X2] [tpda = 2,6-bis(2-pyridylamino)pyridine, X = OAc 3a or Cl 3b] and [Zn(tpda)(CF3SO3)2] 4 has been prepared. Their molecular structures, except complex 4, have been established by X-ray crystallography. In the crystal lattice of 2 the [Zn(dpa)2]2+ cations and CF3SO3- anions are disposed in pairs via intermolecular hydrogen bonds [N(2)…O(2) 2.865(4) A]. The crystal packing of [Zn(dpa)(OAc)2] 1a revealed that two adjacent molecules associate in pairs through intermolecular hydrogen bonding [N(2) …O(4?) 2.816(3) A]. However, the crystal lattice of its tpda derivative 3a shows that the molecules are linked by extensive intermolecular hydrogen bonding between the amino groups and the acetate ligands [N(2)…O(2?) 2.805(3) and N(4)…O(4?) 2.860(3) A] resulting in an interlocking hydrogen bond network. Polymeric one-dimensional tapes are generated through extended pi-pi stacking interactions between the molecules of [Zn(dpa)(4-MeC6H4S)2] 1d, and the thiolate groups are aligned in an all-anti conformation along the metal chain. In the case of [Zn(dpa)(CN)2] 1c, co-operative intermolecular hydrogen bonds and aromatic pi-pi interactions in its solid state lead to a supramolecular two-dimensional sheet. All the zinc(II) complexes display high energy intraligand 1(pi-pi*) fluorescence in degassed MeOH at 298 K, and intraligand 3(pi-pi*) phosphorescence in a glassy solution (MeOH-EtOH 1:2 at 77 K). An emission band observed for 1c (418 nm) and 1d (481 nm) in their solid state emission spectra is ascribed to excimeric emission due to aromatic pi-pi interactions.

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Some scientific research about (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

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499-40-1, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 499-40-1, C12H22O11. A document type is Article, introducing its new discovery.

Mononuclear nickel(II) complexes coordinated by polypyridyl ligands

Three mononuclear polypyridyl complexes of Ni(II), [Ni(Ph 2phen)3](PF6)2¡¤CH 3CN (1), [Ni(dpa)2(phen)](PF6)2 (2) and [Ni(bpy)3](PF6)2 (3), where Ph 2phen is 4,7-diphenyl-1,10-phenanthroline, dpa is 2,2?-dipyridylamine, bpy is 2,2?-bipyridine, and phen is 1,10-phenanthroline, were prepared and their solid state structures determined by single-crystal X-ray crystallography. The structural determination shows that the coordination geometry around the Ni(II) center is a distorted octahedron in each complex. The investigation of synthesis procedure and crystallographic data of complex 3 indicates the spontaneous resolution of supramolecular chirality. A careful inspection of the packing pattern in the lattice of each complex reveals that non-covalent interactions of two different types, viz. C-H?F and C-H?pi interactions, are active in the lattice. The packing structures of 1-3 also show that the rings of the polypyridyl ligands, Ph2phen, dpa, bpy, and phen, are not located face-to-face and can not interact through pi-pi interactions. Cyclic voltammetry data of 1 and 3 show that the Ni(III/II) reduction couple is quasi-reversible and this reduction becomes progressively more difficult on passing from bpy to Ph2phen, while complex 2 shows an irreversible behavior with the peak-to-peak separation of about 500 mV. Magnetic susceptibility data derived from paramagnetic NMR revealed effective magnetic moments of 3.12 BM for 1, 3.27 BM for 2, and 3.14 for 3 at room temperature.

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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a Patent, authors is Wang, Suning£¬once mentioned of 499-40-1, 499-40-1

Organoboron luminescent compounds and methods of making and using same

The invention provides three-coordinated organoboron compounds that are useful for photoluminescence and electroluminescence. Compounds of the invention include light emitters, preferably emitting intense blue light, electron transporters, hole transporters and hole injectors. A particularly preferred such compound is p-(1-naphthylphenylamino)-4,4?-biphenyldimesitylborane (BNPB), which demonstrates all of these properties. The invention further provides methods of synthesizing such three-coordinated boron compounds, methods of producing photoluminescence and electroluminescence, methods for charge transports, methods for hole injection, methods of applying the compounds in thin films, and uses of the compounds of the invention in luminescent probes, and electroluminescent displays.

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Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.499-40-1499-40-1, , Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a patent, introducing its new discovery.

COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF

The present invention provides a, novel compound capable of improving luminous efficiency and lifetime of a device, and an organic electronic element using the same, and an electronic device. using the same. (by machine translation)

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The important role of (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

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499-40-1, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 499-40-1, C12H22O11. A document type is Article, introducing its new discovery.

Spectroelectrochemical properties of a Ru(ii) complex with a thiazolo[5,4-d]thiazole triarylamine ligand

A new bis-chelating ligand containing a triarylamine electron donor core fused with a thiazolo-thiazole electron acceptor, N,N?-(thiazolo[5,4-d]thiazole-2,5-diylbis(4,1-phenylene))bis(N-(pyridin-2-yl)pyridin-2-amine) (1) has been synthesised. This non-innocent ligand exhibits interesting electronic and spectral properties that can be tuned as a function of its redox state. In particular, modulation of the electronic state can be used to turn the fluorescence on and off. A dinuclear Ru(ii) terpyridine complex, [Ru2(tpy)2Cl2(1)](PF6)2 (2) was subsequently synthesised and the properties of each of the accessible redox states explored using in situ spectroelectrochemical techniques.

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Ruthenium(II)-arene complexes with naphthalimide-tagged N,O- and N,N-chelating ligands: Synthesis and biological evaluation

A new family of ruthenium(II)-arene complexes with naphthalimide functionalized N,O- and N,N-chelating ligands of the general formula [Ru(eta6-p-cymene)Cl(L)] (2b-4b) (where: L = 4-[N-(2-((2-hydroxy-5-Br-phenyl)methyl imino)ethyl)]-N-butyl-1,8-naphthalimide (2a), 4-[N-(2-((2-hydroxy-5-Cl-phenyl)methyl imino)ethyl)]-N-butyl-1,8-naphthalimide (3a), and N-butyl-4-[N-(2-((2-hydroxy-5-NO2-phenyl)methylimino)ethyl)]-N-butyl-1,8-naphthalimide (4a), and [Ru(eta6-p-cymene) Cl(L?)]Cl (8b-9b) (where L? = N-(2,2?-dipyridylaminoethyl)-1,8-naphthalimide (8a) and N-(2,2?-dipyridylaminopropyl)-1,8-naphthalimide (9a) have been synthesized and characterized. The in vitro cytotoxic activities of the ligands (2a, 9a) and the complexes (2b-4b, and 8b-9b) have been evaluated against the human melanoma skin cancer (CRL7687) and normal noncancerous (CA-M75) cell lines. All the compounds exhibit potent cytotoxic activities with IC50 values of ?1 muM or less but displayed variable selectivity. The compounds with N,O-ligands were found to be less selective than those containing N,N-chelating ligands. Notably, complex 9b displayed the highest selectivity towards cancer cells over health cells. The interactions of the compounds with calf thymus DNA (CT-DNA) have also been investigated by UV-Vis and fluorescence spectra, ethidium bromide displacement assay and gel electrophoretic studies, which revealed that the compounds bind to CT-DNA moderately presumably through an intercalative mode.

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Extracurricular laboratory:new discovery of (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

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Three one-dimensional systems with end-to-end dicyanamide bridges between copper(II) centres: Structural and magnetic properties

The preparation, crystal structures and magnetic properties of three different copper(II) chains of formula [Cu(pyim)-(H2O)(dca)]n(NO3), (1), [Cu(dpa)(dca)2]n (2) and [Cu(bpa)(dca)2], (3) [pyim = 2-(2-pyridyl)imidazole, dca = dicyanamide anion, dpa = 2,2?-dipyridylamine and bpa = 1,2-bis(4-pyridyl)ethane] are reported. A chain structure with single, symmetrical, end-to-end dca bridges is found in compound 1. This bridging mode, with two short, equatorially coordinated Cu-N bonds has not been previously observed in the [Cu(dca)Xn] (X = coligand) family of compounds. The copper atom in 1 has a distorted square pyramidal geometry with a bidentate pyim ligand and two nitrile nitrogen atoms from two dca groups in the equatorial positions and a water molecule occupying the axial site. In compound 2, the single dca bridge is of the asymmetric end-to-end type. The copper environment in 2 is also distorted square pyramidal with a bidentate dpa ligand and two nitrile nitrogen atoms (one from a terminally bound dca and the other from a bridging dca) in the equatorial positions and a nitrile nitrogen atom from another bridging dca occupying the axial site. Compound 3 also features a uniform chain structure. In this case double, asymmetric end-to-end dca bridges and a bis-monodenate bpa bridge in the gauche conformation connect the neighbouring copper atoms. The copper(II) coordination geometry in 3 is elongated octahedral with two trans coordinated bpa nitrogen atoms and two dca nitrile nitrogens in the equatorial sites and two nitrile nitrogen atoms from two other dca groups occupying the axial positions. The copper-copper separations across the dca bridges are 7.7011 (9) (1), 7.689(2) (2) and 7.095(3) A (3). Magnetic susceptibility measurements for 1-3 in the temperature range 1.9-290 K reveal the occurrence of weak intrachain antiferromagnetic interactions [J = -0.35 (1), -0.10 (2) and -0.22 cm-1 (3) the Hamiltonian being defined as H= -J ?iSi¡¤Si + 1]. The efficiency of the dca bridge to mediate magnetic interactions in copper(II) complexes is analyzed and discussed in the light of the available magneto-structural data.

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Discovery of (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

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Novel copper complexes based on the thiocyanate bridge – Synthesis, X-ray studies and magnetic properties

Three novel compounds {[Cu(bpzm)(SCN)][Cu(bpzm)(MeOH)][Cu(SCN) 4]}n (1a), {[Cu2(bpzm)2(mu-SCN) (SCN)3]}n (1b) and [Cu2(mu-SCN) 2(SCN)2(dpa)2] (2) have been obtained in one-step self-assembly reaction of copper dichloride, a suitable N-N ligand (bis(pyrazol-1-yl)methane and 2,2?-dipyridylamine) and ammonium thiocyanate. For the reaction involving bis(pyrazol-1-yl)methane, an unprecedented in situ reduction of some Cu(II) ions to Cu(I) has been observed. The compound {[Cu(bpzm)(SCN)][Cu(bpzm)(MeOH)][Cu(SCN)4]}n (1a) belongs to a relatively scarce group of mixed-valence Cu II/CuI coordination polymers with interesting polymeric architecture. It creates infinite two-dimensional structure consisting of layers extending along crystallographic plane (0 0 1), in which the cations [Cu II(bpzm)(SCN)]+ and [CuII(bpzm)(MeOH)] 2+ are connected by ions [CuI(SCN)4] 3- through single end-to-end thiocyanato bridges. Structure 1b consists two crystallographically independent chains. The chain A has a zig-zag form and extends along the crystallographic direction [0 0 1], whereas the second chain is linear and runs along the crystallographic direction [0 1 0]. The structure 2 consists of dinuclear [Cu2(dpa)2(mu-SCN) 2(SCN)2] units. Variable-temperature magnetic susceptibility measurements show very weak antiferromagnetic interactions between the paramagnetic centres Cu(II) centers inside the crystal lattices of three novel compounds.

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Synthesis, Spectroscopic and Molecular Studies of Half-Sandwich eta6-Arene Ruthenium, Cp Rhodium and Cp Iridium Metal Complexes with Bidentate Ligands

The bidentate ligand benzoyl(2-pyridyl)thiourea (L1) was prepared by reaction of benzoyl isothiocyanate with primary amine (2-aminopyridine) but the reaction with secondary amine bis(2-pyridyl)amine, yielded the unexpected product bis(2-pyridyl)benzoylamine (L2). Mononuclear complexes of the general formula [(eta6-arene)Ru(L)Cl]+ {where, L = L1, arene = benzene (1); p-cymene (2); L = L2, arene = benzene (5); p-cymene (6)} and [CpM(L)Cl]+ {where, L = L1, M = Rh (3), Ir (4); L = L2, M = Rh (7), Ir (8)}, respectively, were formed by reaction of the ligands L1 and L2 with precursor complexes [(eta6-arene)Ru(mu-Cl)Cl]2 and [CpM(mu-Cl)Cl]2 (M = Rh, Ir). The cationic complexes were characterized by FT-IR, UV/Vis, and 1H-NMR spectroscopy as well as mass spectrometry. X-ray crystallographic studies of these complexes reveal piano-stool-like arrangements around the metal atoms with six-membered metallacycles in which L1 and L2 act as a N, S- and N, N’ chelating ligands, respectively.

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Syntheses, crystal structures and thermal decomposition kinetics of Ni(II) and Cu(II) complexes with dpa and dca: [Ni(dpa)2(dca)2] and [Cu(dpa)2(dca)2] (dpa = 2, 2?-dipyridylamine, dca = sodium dicyanamide) ligands

The syntheses, crystal structures, luminescence properties and thermal decomposition kinetics of Ni(II) and Cu(II) complexes with dpa and dca, [Ni(dpa)2 (dca)2] (I) and [Cu(dpa)2(dca) 2] (II) (dpa = 2, 2?-dipyridylamine, dca = sodium dicyanamide) are described. I crystallizes in Monoclinic cells with c2c space groups; the center metal ion NiII lies in a distorted octahedron environment, and the endmost nitrogen atom of dca with a “V” model coordinates to NiII. Though the chemical formula of II is similar to I, II crystallizes in triclinic cells with a Pi space group. The center Cu II ion has an octahedral-coordinated environment. Copyright

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