New types of Cu and Ag clusters supported by the pyrrole-based NNN-pincer type ligand

2017 ◽  
Vol 41 (17) ◽  
pp. 9361-9370 ◽  
Author(s):  
Oishi Jana ◽  
Ganesan Mani
Keyword(s):  
Coordination Polymers ◽  
Anionic Form ◽  
Neutral Ligand ◽  
New Type ◽  
Ag Clusters

While the neutral ligand 2,5-bis(3,5-dimethylpyrazolylmethyl)pyrrole gives the dihalide ion bridged binuclear and coordination polymers, its anionic form affords a new type of tetranuclear ‘hourglass’ shaped copper(i) and triangular silver(i) clusters owing to its increased denticity.

scholarly journals From helices to superhelices: hierarchical assembly of homochiral van der Waals 1D coordination polymers

2021 ◽  
Vol 12 (38) ◽  
pp. 12619-12630
Author(s):  
Guo-Guo Weng ◽  
Ben-Kun Hong ◽  
Song-Song Bao ◽  
Yujie Wen ◽  
Lan-Qing Wu ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Coordination Polymers ◽  
Van Der Waals ◽  
Hierarchical Assembly ◽  
New Type

Superhelices of terbium phosphonates formed following a new type of “chain-twist-growth” mechanism involving flexible cyclohexyl groups.

Discrete systems and two-dimensional coordination polymers containing potentially multidentate and bridging inorganic anions: Observation of a new type of two-dimensional topology

Polyhedron ◽  
2014 ◽  
Vol 74 ◽  
pp. 57-66 ◽  
Author(s):  
Arpita Biswas ◽  
Arpita Jana ◽  
Sohini Sarkar ◽  
Hazel A. Sparkes ◽  
Judith A.K. Howard ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Discrete Systems ◽  
Inorganic Anions ◽  
Two Dimensional ◽  
New Type

A New Type of Charge-Transfer Salts Based on Tetrathiafulvalene–Tetracarboxylate Coordination Polymers and Methyl Viologen

2014 ◽  
Vol 53 (7) ◽  
pp. 3480-3487 ◽  
Author(s):  
Yu-De Huang ◽  
Peng Huo ◽  
Ming-Yan Shao ◽  
Jing-Xue Yin ◽  
Wei-Chun Shen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Coordination Polymers ◽  
Methyl Viologen ◽  
Charge Transfer Salts ◽  
New Type

scholarly journals Proton dynamics of two-dimensional oxalate-bridged coordination polymers

2014 ◽  
Vol 16 (32) ◽  
pp. 17295-17304 ◽  
Author(s):  
Satoshi Miyatsu ◽  
Maiko Kofu ◽  
Atsushi Nagoe ◽  
Takeshi Yamada ◽  
Masaaki Sadakiyo ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Coordination Polymers ◽  
Conduction Mechanism ◽  
Proton Conductor ◽  
Proton Conduction ◽  
Two Dimensional ◽  
Quasielastic Neutron ◽  
New Type ◽  
Proton Dynamics ◽  
Quasielastic Neutron Scattering

The dynamics of H2O molecules and NH4+ ions in a new type of crystalline proton conductor (NH4)2(adp)[Zn2(ox)3]·3H2O has been investigated by quasielastic neutron scattering techniques to elucidate the proton conduction mechanism.

Structural diversity of coordination polymers with bridging 3-pyridylmethanol ligand: New type of coordination polymer with different stereochemistry of copper(II) atom

Polyhedron ◽  
2006 ◽  
Vol 25 (7) ◽  
pp. 1561-1566 ◽  
Author(s):  
Jan Moncol ◽  
Peter Segla ◽  
Dusan Miklos ◽  
Milan Mazur ◽  
Milan Melnik ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Structural Diversity ◽  
New Type

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

New type electron gun with electrostatic and electromagnetic lenses

1978 ◽  
Vol 36 (1) ◽  
pp. 62-63
Author(s):  
T. Ichinokawa ◽  
H. Maeda
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Optimum Condition ◽  
Bias Voltage ◽  
Electron Gun ◽  
Charge Effect ◽  
Micro Fabrication ◽  
Maximum Brightness ◽  
New Type ◽  
The Ideal

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.

A new type of defect structure in 124-superconducting oxide revealed by HREM

1991 ◽  
Vol 49 ◽  
pp. 1092-1093
Author(s):  
R. Sharma ◽  
B.L. Ramakrishna ◽  
N.N. Thadhani ◽  
D. Hianes ◽  
Z. Iqbal
Keyword(s):  
Shock Wave ◽  
Defect Structure ◽  
Neutron Radiation ◽  
Weak Links ◽  
Defect Structures ◽  
New Materials ◽  
New Type ◽  
Current Densities ◽  
Processing Techniques ◽  
Microstructural Studies

After materials with superconducting temperatures higher than liquid nitrogen have been prepared, more emphasis has been on increasing the current densities (Jc) of high Tc superconductors than finding new materials with higher transition temperatures. Different processing techniques i.e thin films, shock wave processing, neutron radiation etc. have been applied in order to increase Jc. Microstructural studies of compounds thus prepared have shown either a decrease in gram boundaries that act as weak-links or increase in defect structure that act as flux-pinning centers. We have studied shock wave synthesized Tl-Ba-Cu-O and shock wave processed Y-123 superconductors with somewhat different properties compared to those prepared by solid-state reaction. Here we report the defect structures observed in the shock-processed Y-124 superconductors.

ESEM - A multipurpose surface Electron Microscope

1986 ◽  
Vol 44 ◽  
pp. 632-633 ◽  
Author(s):  
G.D. Danilatos
Keyword(s):  
Electron Microscope ◽  
Room Temperature ◽  
Environmental Scanning ◽  
Gas Composition ◽  
Saturated Water Vapor ◽  
Surface Electron ◽  
Current State ◽  
Saturated Water ◽  
New Type ◽  
Temperature And Pressure

Over recent years a new type of electron microscope - the environmental scanning electron microscope (ESEM) - has been developed for the examination of specimen surfaces in the presence of gases. A detailed series of reports on the system has appeared elsewhere. A review summary of the current state and potential of the system is presented here.The gas composition, temperature and pressure can be varied in the specimen chamber of the ESEM. With air, the pressure can be up to one atmosphere (about 1000 mbar). Environments with fully saturated water vapor only at room temperature (20-30 mbar) can be easily maintained whilst liquid water or other solutions, together with uncoated specimens, can be imaged routinely during various applications.

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