Synthesis and structural characterization of the luminescent tetranuclear complex [NBu4]2[(C6F5)6(μ-OH)3Pt3HgCl] with Pt–Hg bonds unsupported by covalent bridging ligands

2000 ◽  
Vol 593-594 (1) ◽  
pp. 421-426 ◽  
Author(s):  
J Casas
Keyword(s):  
Structural Characterization ◽  
Bridging Ligands ◽  
Tetranuclear Complex ◽  
Covalent Bridging

Synthesis and structural characterization of homochiral coordination polymers with imidazole-based monocarboxylate ligands

2019 ◽  
Vol 48 (24) ◽  
pp. 8731-8739 ◽  
Author(s):  
Elena Borrego ◽  
Antonio I. Nicasio ◽  
Eleuterio Álvarez ◽  
Francisco Montilla ◽  
José Manuel Córdoba ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Structural Characterization ◽  
Two Dimensional ◽  
Bridging Ligands ◽  
Silver Copper ◽  
Copper And Zinc

Two-dimensional homochiral coordination polymers of sodium, silver, copper and zinc were obtained with 2alkyl,2-(1H-imidazol-1-yl)acetate anions as bridging ligands.

The synthesis and structural characterization of linear and macrocyclic bis(dinitrosyliron) complexes supported by bis(phosphine) bridging ligands

2003 ◽  
Vol 81 (6) ◽  
pp. 468-475 ◽  
Author(s):  
Lijuan Li ◽  
Nada Reginato ◽  
Michael Urschey ◽  
Mark Stradiotto ◽  
John D Liarakos
Keyword(s):  
Solid State ◽  
Structural Characterization ◽  
Mononuclear Complex ◽  
Phosphine Ligands ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Bridging Ligands ◽  
X Ray ◽  
Phosphine Complexes

Reactions involving Fe(NO)2(CO)2 and the bis(phosphine) ligands bis(diphenylphosphino)methane (DPPM), bis(diphenylphosphino)acetylene (DPPA), 1,6-bis(diphenylphosphino)hexane (DPPH), and 1,4-bis(diphenyl phosphino)benzene (DPPB) have been examined. From these reactions, the mononuclear complex, Fe(κ1-DPPM)(NO)2(CO) 3, linear dinuclear species of the type Fe2(µ-L)(NO)4(CO)2 (L = Ph2PCH2PPh2 4, Ph2PC[Formula: see text]CPPh2 5, Ph2PCH2(CH3)4CH2PPh2 6, and Ph2P(p-C6H4)PPh2 7), and macrocyclic dinuclear species of the type Fe2(µ-L)2(NO)4 (L = Ph2PCH2PPh2 8 and Ph2PC[Formula: see text]CPPh2 9) were isolated and spectroscopically characterized. For 4, 5, 8, and 9, the solid-state molecular structures of the products were determined by use of single-crystal X-ray diffraction techniques. Key words: dinitrosyliron, iron nitrosyls, dinuclear macrocycles, bis(phosphine) complexes.

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

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