Tetra­kis(triphenyl­phosphane-κP)silver(I) trifluoro­methane­sulfonate dichloro­methane monosolvate

In the title compound, [Ag(C18H15P)4]CF3O3S·CH2Cl2, the Ag atom is coordinated by four P atoms from four PPh3 ligands. The P—Ag—P angles are in the range 108.02 (6)–110.15 (6)°, which confirms the distorted tetra­hedral environment around the Ag atom

Poly[bis­[μ-1,3-bis­(diphenyl­phosphan­yl)propane-κ2 P:P′]-di-μ-thio­cyanato-κ2 S:N;κ2 N:S-disilver(I)]

In the title coordination polymer, [Ag2(NCS)2(C27H26P2)2]n, two centrosymmetrically related Ag+ cations are linked by two thio­cyanate anions into binuclear eight-membered macrocycles. The Ag⋯Ag separation within the macrocycle is 5.4400 (6) Å. The distorted tetra­hedral coordination about each metal atom is completed by the P atoms of two bridging 1,3-bis­(diphenyl­phosphan­yl)propane ligands, forming polymeric ribbons parallel to the a axis

catena-Poly[silver(I)-bis­[μ-bis­(diphenyl­phosphino)methane-κ2 P:P′]-μ-thio­cyanato-κ2 S:S-silver(I)-μ-thio­cyanato-κ2 S:N]

The title compound, [Ag(NCS)(C25H22P2)]n, contains two Ag+ ions, two thio­cyanate ions and two bis­(diphenyl­phosphino)methane (dppm) ligands in the asymmetric unit. One of the thiocyanate ions bridges the two Ag+ ions in a μ2-mode from its S atom and the two dppm ligands bridge the silver ions in a μ1,μ1 mode. The remaining SCN− ion bridges the binuclear units via its N and S atoms, generating a one-dimensional polymer propagating in [01]: the resulting AgP2SN and AgP2S2 coordination geometries could be described as distorted tetra­hedral

Tetra­kis(triphenyl­phosphane-κP)silver(I) tetra­fluorido­borate

The title complex, [Ag(C18H15P)4]BF4, was prepared by the reaction of silver(I) tetra­fluorido­borate and triphenyl­phosphane in the presence of 1,2-bis­(pyridin-2-yl)ethyl­ene. The AgI atom is tetra­hedrally coordinated by four P atoms from triphenyl­phosphane (PPh3) ligands. Due to symmetry, the tetra­fluorido­borate anion is disordered over three positions (each with one third occupancy). The tetra­fluorido­borate anion does not coordinate to the AgI atom

(Methanol-κO)(perchlorato-κO)bis­(triphenyl­phosphine-κP)silver(I)

In the title complex, [Ag(ClO4)(CH3OH)(C18H15P)2], the angles around the central Ag+ ion indicate that it is in a distorted tetrahedral coordination. The coordination sphere of silver is formed by two P atoms of two triphenyl­phosphine ligands, one O atom of a perchlorate anion and one O atom of a methanol mol­ecule. The crystal structure is stablized by a bifurcated inter­molecular O—H⋯O hydrogen bond, involving the O—H donor from methanol and two acceptor O atoms from the perchlorate anion, so forming a zigzag chain propagating in [010]

4-Hydr­oxy-2,2,6,6-tetra­methyl­piperidinium hydrogensulfate monohydrate

In the title compound, C9H20NO+·HO4S−·H2O, the piperi­dinium ring adopts a chair conformation. Inter­molecular O—H⋯O and N—H⋯O hydrogen bonds form an extensive three-dimensional network, which consolidates the crystal structure

Implantation of neural stem cells embedded in hyaluronic acid and collagen composite conduit promotes regeneration in a rabbit facial nerve injury model

The implantation of neural stem cells (NSCs) in artificial scaffolds for peripheral nerve injuries draws much attention. NSCs were ex-vivo expanded in hyaluronic acid (HA)-collagen composite with neurotrophin-3, and BrdU-labeled NSCs conduit was implanted onto the ends of the transected facial nerve of rabbits. Electromyography demonstrated a progressive decrease of current threshold and increase of voltage amplitude in de-innervated rabbits after implantation for one, four, eight and 12 weeks compared to readouts derived from animals prior to nerve transection. The most remarkable improvement, observed using Electrophysiology, was of de-innervated rabbits implanted with NSCs conduit as opposed to de-innervated counterparts with and without the implantation of HA-collagen, NSCs and HA-collagen, and HA-collagen and neurotrophin-3. Histological examination displayed no nerve fiber in tissue sections of de-innervated rabbits. The arrangement and S-100 immunoreactivity of nerve fibers in the tissue sections of normal rabbits and injured rabbits after implantation of NSCs scaffold for 12 weeks were similar, whereas disorderly arranged minifascicles of various sizes were noted in the other three arms. BrdU+ cells were detected at 12 weeks post-implantation. Data suggested that NSCs embedded in HA-collagen biomaterial could facilitate re-innervations of damaged facial nerve and the artificial conduit of NSCs might offer a potential treatment modality to peripheral nerve injuries

Di-μ-sulfato-bis­[diaqua­(1H-imidazo[4,5-f][1,10]phenanthroline)nickel(II)] dihydrate

In the title compound, [Ni2(SO4)2(C13H8N4)2(H2O)4]·2H2O, the complete dimeric complex is generated by an inversion center. The NiII atoms are octa­hedrally coordinated by two N atoms from one 1H-imidazo[4,5-f][1,10]phenanthroline (IP) ligand and two O atoms from two adjacent sulfate ions forming the equatorial plane, with two coordinated water mol­ecules in the axial sites. Both of the sulfate ions act as bidentate-bridging ligands connecting the two NiII ions, thus generating a binuclear complex. In the crystal structure, O—H⋯O and O—H⋯N hydrogen bonds involving the coordinated and uncoordinated water mol­ecules and N—H⋯O links lead to the formation of a two-dimensional sheet structure developing parallel to (010). Weak π–π stacking inter­actions [centroid–centroid separation = 3.613 (2) Å] between the IP ligands also occur