scholarly journals Glazunov’s electrography—the first electrochemical imaging and the first solid-state electroanalysis

2021 ◽  
Author(s):  
Fritz Scholz
Keyword(s):  
Solid State ◽  
Electrochemical Activity ◽  
Electrochemical Technique ◽  
Scientific Achievement ◽  
Solid Materials ◽  
Spatially Resolved ◽  
Distribution Of Elements ◽  
Electrochemical Imaging ◽  
First Time

AbstractAleksandr Il’ich Glazunov developed the first electrochemical technique to image the surface of conducting solids giving the technique the name electrography. The electrographic images can mirror the distribution of elements on the surface of solid materials and also the electrochemical activity, caused by variations of “dissolution tension”. Thus, he has established for the first time a kind of spatially resolved electrochemistry. Electrography is also the first direct electroanalytical technique for solid materials. The present paper gives an account of his turbulent life in Russia, Czechoslovakia and Chile, and a discussion of his main scientific achievement, the development of electrography.

Bis(1-phenyl-1-propyne) complexes of tungsten(II): crystal structures of [WI2(CO)(NCR)(η2-MeC2Ph)2] (R = Me, Et, or Ph)

2001 ◽  
Vol 79 (3) ◽  
pp. 263-271
Author(s):  
Paul K Baker ◽  
Michael GB Drew ◽  
Deborah S Evans
Keyword(s):  
Carbon Monoxide ◽  
Solid State ◽  
Crystal Structures ◽  
Octahedral Geometry ◽  
X Ray ◽  
X Ray Crystallography ◽  
Alkyne Complexes ◽  
First Time

Reaction of [WI2(CO)3(NCMe)2] with two equivalents of 1-phenyl-1-propyne (MeC2Ph) in CH2Cl2, and in the absence of light, gave the bis(1-phenyl-1-propyne) complex [WI2(CO)(NCMe)(η2-MeC2Ph)2] (1) in 77% yield. Treatment of equimolar quantities of 1 and NCR (R = Et, i-Pr, t-Bu, Ph) in CH2Cl2 afforded the nitrile-exchanged products, [WI2(CO)(NCR)(η2-MeC2Ph)2] (2-5) (R = Et (2), i-Pr (3), t-Bu (4), Ph (5)). Complexes 1, 2, and 5 were structurally characterized by X-ray crystallography. All three structures have the same pseudo-octahedral geometry, with the equatorial sites being occupied by cis and parallel alkyne groups, which are trans to the cis-iodo groups. The trans carbon monoxide and acetonitrile ligands occupy the axial sites. In structures 1 and 2, the methyl and phenyl substituents of the 1-phenyl-1-propyne ligands are cis to each other, whereas for the bulkier NCPh complex (5), the methyl and phenyl groups are trans to one another. This is the first time that this arrangement has been observed in the solid state in bis(alkyne) complexes of this type.Key words: bis(1-phenyl-1-propyne), carbonyl, nitrile, diiodo, tungsten(II), crystal structures.

Spatially Resolved Solid-State 1H NMR for Evaluation of Gradient-Composition Polymeric Libraries

2012 ◽  
Vol 14 (7) ◽  
pp. 415-424 ◽  
Author(s):  
Johannes Leisen ◽  
Ismael J. Gomez ◽  
John A. Roper ◽  
J. Carson Meredith ◽  
Haskell W. Beckham
Keyword(s):  
Solid State ◽  
1H Nmr ◽  
Spatially Resolved ◽  
Gradient Composition

Gold(I) Complexes Bearing P∩N-Ligands: An Unprecedented Twelve-membered Ring Structure Stabilized by Aurophilic Interactions

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1513-1524 ◽  
Author(s):  
Uwe Monkowius ◽  
Manfred Zabel ◽  
Michel Fleck ◽  
Hartmut Yersin
Keyword(s):  
Solid State ◽  
Ring Structure ◽  
Phosphine Ligands ◽  
X Ray Crystallography ◽  
Aggregation Pattern ◽  
Elemental Analyses ◽  
High Yields ◽  
First Time ◽  
Solid State Structures ◽  
Aurophilic Interactions

The P∩N-ligands Ph2Pqn, 1, Ph2 Piqn, 2, Ph2 Ppym, 3, and the As∩N-ligands Ph2Asqn, 4, Ph2Asiqn, 5, (Ph = phenyl, qn = 8-quinoline, iqn = 1-isoquinoline, pym = 2-pyrimidine) have been synthesized, the ligands 2 and 5 for the first time. Their ligand properties were probed by the synthesis of gold(I) complexes. Reaction with (tht)AuCl (tht = tetrahydrothiophene) yielded the chlorogold complexes Ph2RP-Au-Cl (R = qn, 6; iqn, 7; pym, 8) and Ph2RAs-Au-Cl (R = qn, 9; iqn, 10) in high yields. Further treatment of 7 and 8 with one equivalent of AgBF4 provided the complexes [(Ph2Piqn)Au]BF4, 11, [(Ph2Ppym)Au]BF4, 12, and [(Ph2Piqn)Au(tht)]BF4, 14. For comparison, the previously reported complex [(Ph2Ppy)Au]BF4 (py = pyridine), 13, was re-investigated. The compounds were characterized by elemental analyses, mass spectrometry and NMR spectroscopy. In addition, the solid-state structures of 2, 3, 6, 7, 9 - 14 have been determined by X-ray crystallography. The chloro-gold compounds crystallize in the common rod-like structure known from R3EAuCl (R = aryl, E = P, As) complexes without further aggregation via aurophilic interactions. In all cases the phosphine acts as a monodentate ligand. In the solid state compounds 11 - 13 feature an unprecedented cyclic trinuclear aggregation pattern, in which the Au(I) atoms are linearly coordinated by the bridging phosphine ligands forming a cyclic (P-Au-N)3 arrangement. The resulting twelvemembered ring is further stabilized by Au · · · Au interactions. Due to the presence of these Au · · · Au contacts, 11 - 13 are emissive in the solid state but not in solution

Tuning the electrochemical and catalytic ORR performance of C60 by its encapsulation in ZIF-8: a solid-state analogue of dilute fullerene solution

2021 ◽  
Vol 5 (20) ◽  
pp. 7654-7665
Author(s):  
Olivia Basu ◽  
Subhabrata Mukhopadhyay ◽  
Avik De ◽  
Anupam Das ◽  
Samar K. Das
Keyword(s):  
Solid State ◽  
Active Sites ◽  
Metal Organic Frameworks ◽  
Electrochemical Activity ◽  
High Density ◽  
Fullerene Solution ◽  
Metal Organic ◽  
Significant Attention

Hassle-free encapsulation of fullerene C60 in ZIF-8 has been performed to preserve the molecularity and solution-like properties of C60 in solid-state. The resulting composite shows efficient heterogeneous electrocatalytic oxygen reduction reaction.

Metal–organic cage-based nanoagent for enhanced photodynamic antitumor therapy

2021 ◽  
Author(s):  
Yu-Bin Dong ◽  
Wen-Yan Li ◽  
Chaowei Zhao ◽  
Yue-Feng Zhang ◽  
Qun Guan ◽  
...  
Keyword(s):  
Solid State ◽  
Indocyanine Green ◽  
Anion Exchange ◽  
Near Infrared ◽  
Antitumor Therapy ◽  
Metal Organic ◽  
First Time

Herein we report, for the first time, a Pd6L8(NO3)5.4(ICG)6.6 (ICG = indocyanine green) cage-based hexagonal nanoplate (3) via a combined nanoprecipitation and solid-state anion-exchange approach. 3 possesses near infrared (NIR)...

scholarly journals Revisiting the bis(dimethylamido) metallocene complexes of thorium and uranium: improved syntheses, structure, spectroscopy, and redox energetics of (C5Me5)2An(NMe2)2 (An = Th, U)

2017 ◽  
Vol 46 (34) ◽  
pp. 11208-11213 ◽  
Author(s):  
K. A. Erickson ◽  
B. D. Kagan ◽  
B. L. Scott ◽  
D. E. Morris ◽  
J. L. Kiplinger
Keyword(s):  
Solid State ◽  
Uv Visible ◽  
First Time ◽  
Solid State Structures ◽  
Metallocene Complexes

In addition to improved syntheses, the solid-state structures, voltammetric data and UV-visible–NIR spectra of (C5Me5)2An(NMe2)2 (An = Th, U) complexes are presented for the first time.

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