Dynamic Effects in Crystalline Coordination Polymers

CrystEngComm ◽  
2021 ◽  
Author(s):  
Bibhuti Bhusan Rath ◽  
Jagadese J. Vittal
Keyword(s):  
Mechanical Properties ◽  
Coordination Polymers ◽  
Dynamic Effects ◽  
Crystalline Materials

This highlight presents the recent scientific developments in the mechanical properties of crystalline coordination polymers (CPs). CPs have emerged as relatively new crystalline materials in the field of mechanically responsive...

Luminescence, chemical sensing and mechanical properties of crystalline materials based on lanthanide–sulfonate coordination polymers

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 110171-110181 ◽  
Author(s):  
Richard F. D'Vries ◽  
German E. Gomez ◽  
Diego F. Lionello ◽  
M. Cecilia Fuertes ◽  
Galo J. A. A. Soler-Illia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Coordination Polymers ◽  
Chemical Sensing ◽  
Structural Features ◽  
Crystalline Materials ◽  
Sensing Properties ◽  
Lanthanide Metals ◽  
The Relationship ◽  
Phenanthroline Ligands

The relationship between the structural features with the mechanical, luminescent and sensing properties were studied in the compounds formed from lanthanide metals, 3-hydroxinaphthalene-2,7-disulfonate and 1,10-phenanthroline ligands.

Exploring the diversity of elastic responses of crystalline cadmium(ii) coordination polymers: from elastic towards plastic and brittle responses

CrystEngComm ◽  
2021 ◽  
Author(s):  
Mateja Pisačić ◽  
Ivan Kodrin ◽  
Ivana Biljan ◽  
Marijana Đaković
Keyword(s):  
Mechanical Properties ◽  
Coordination Polymers ◽  
Integrated Approach ◽  
Elastic Responses ◽  
Theory And Experiment

Noticeable differences in mechanically induced elastic responses were observed for isostructural crystalline coordination polymers, and their mechanical properties were examined through a highly integrated approach, using both theory and experiment.

Two-dimensional coordination polymers and metal–organic gels of symmetrical and unsymmetrical dipyridyl β-diketones: luminescence, dye absorption and mechanical properties

2016 ◽  
Vol 40 (3) ◽  
pp. 1997-2006 ◽  
Author(s):  
Kaustuv Banerjee ◽  
Kumar Biradha
Keyword(s):  
Mechanical Properties ◽  
Functional Groups ◽  
Coordination Polymers ◽  
Two Dimensional ◽  
Dye Absorption ◽  
Metal Organic

The ligands containing chelating as well as exodentate functional groups were shown to form functional coordination polymers and heterometallic gels.

Effects of dynamic indentation on the mechanical response of materials

2008 ◽  
Vol 23 (6) ◽  
pp. 1604-1613 ◽  
Author(s):  
M.J. Cordill ◽  
N.R. Moody ◽  
W.W. Gerberich
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Mechanical Response ◽  
Length Scale ◽  
Polycrystalline Nickel ◽  
Dynamic Indentation ◽  
Crystalline Materials ◽  
Fused Quartz ◽  
Hardness Values ◽  
Measured Hardness

Dynamic indentation techniques are often used to determine mechanical properties as a function of depth by continuously measuring the stiffness of a material. The dynamics are used by superimposing an oscillation on top of the monotonic loading. Of interest was how the oscillation affects the measured mechanical properties when compared to a quasi-static indent run at the same loading conditions as a dynamic. Single crystals of nickel and NaCl as well as a polycrystalline nickel sample and amorphous fused quartz and polycarbonate have all been studied. With respect to dynamic oscillations, the result is a decrease of the load at the same displacement and thus lower measured hardness values of the ductile crystalline materials. It has also been found that the first 100 nm of displacement are the most affected by the oscillating tip, an important length scale for testing thin films, nanopillars, and nanoparticles.

Recent advances in structures and applications of coordination polymers based on cyclohexanepolycarboxylate ligands

2022 ◽  
Author(s):  
Yong-Cong Ou ◽  
Ri-Ming Zhong ◽  
Jian-Zhong Wu
Keyword(s):  
Coordination Polymers ◽  
Organic Ligands ◽  
Three Dimensions ◽  
Crystalline Materials ◽  
Recent Advances ◽  
Coordination Bonds

Coordination polymers (CPs) are emerging crystalline materials constructed by metal entities and organic ligands through coordination bonds, containing infinite coordination units in one, two, or three dimensions. Here an overview...

scholarly journals Low-amplitude dynamic tests of fine gravel in a resonant column

2019 ◽  
Vol 97 ◽  
pp. 04024
Author(s):  
Zaven Ter-Martirosyan ◽  
Evgeny Sobolev ◽  
George Anzhelo
Keyword(s):  
Mechanical Properties ◽  
Dynamic Properties ◽  
Sample Volume ◽  
Coarse Grained ◽  
Software Systems ◽  
Resonant Column ◽  
Dynamic Effects ◽  
Laboratory Equipment ◽  
Aggregate Fractions ◽  
Sample Assembly

Construction of industrial and civil buildings, taking into account the dynamic effects on the foundations, requires special experiments on the mechanical properties of soils. This article presents the results of studying the dynamic properties of coarse gravelly soils using the resonant column method. These studies are relevant, since the determination of the dynamic properties of coarse-grained soils under laboratory conditions is associated with a restriction on the size of the fractions in the sample volume. This circumstance leads to the fact that at the moment most of the laboratory tests of the dynamic properties of coarse-grained soils are performed on smaller aggregate fractions, which, in general, significantly reduces the resulting mechanical properties of soils. It does not reflect the real operation of the foundation of buildings during dynamic effects. This paper presents a description of the available laboratory equipment, the sequence of preparation of samples of coarse grained crushed stone soil and sample assembly in the working chamber of the installation. The article contains the main graphs characterizing the change in shear modulus and damping coefficient depending on shear deformations. It is noted that the results obtained are particularly relevant for modeling the dynamic effects of natural and man-made character on the foundations of industrial and civil buildings, the bases of which are composed of coarse-grained soils. Dynamic parameters considered in this paper, can and must be used in numerical calculations by finite element method with the use of modern groundwater models in geotechnical software systems.

Abrasive Wear Resistance of Bulk Metallic Glasses

2000 ◽  
Vol 644 ◽  
Author(s):  
A. Lindsay Greer ◽  
Wha-Nam Myung
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Abrasive Wear Resistance ◽  
Good Resistance ◽  
Fundamental Interest ◽  
Crystalline Materials ◽  
Resistance To Sliding

AbstractThis paper reviews work on the wear of metallic glasses in general, as well as reporting recent results on the abrasive wear of bulk metallic glasses. The distinctive mechanical properties of metallic glasses make their wear resistance of fundamental interest. Metallic glasses, and the partially or fully crystalline materials derived from them, can have very good resistance to sliding and abrasive wear. Standard wear laws are followed, with behaviour similar to that of conventional hardened alloys. The microhardness and abrasive wear resistance are measured for four bulk metallic glasses (based on La, Mg, Pd or Zr). The hardness and wear resistance correlate well with the Young's modulus of the glass.

Functional heterometallic coordination polymers with metalloligands as tunable luminescent crystalline materials

2012 ◽  
Vol 22 (37) ◽  
pp. 19673 ◽  
Author(s):  
Dong-Ying Du ◽  
Jun-Sheng Qin ◽  
Cheng-Xin Sun ◽  
Xin-Long Wang ◽  
Shu-Ran Zhang ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Crystalline Materials ◽  
Heterometallic Coordination Polymers

scholarly journals Atomically Precise Crystalline Materials Based on Kinetically Inert Metal Ions via Reticular Mechanopolymerization

2020 ◽  
Author(s):  
Wen-Yang Gao ◽  
Aishanee Sur ◽  
Chen-Hao Wang ◽  
Gregory R. Lorzing ◽  
Alexandra M. Antonio ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Metal Ions ◽  
Coordination Polymers ◽  
Solid Solutions ◽  
Mechanochemical Synthesis ◽  
Rational Approach ◽  
Structural Elements ◽  
Coordination Networks ◽  
Crystalline Materials ◽  
Metal Materials

The incorporation of kinetically inert metal ions as structural elements in crystalline coordination polymers is a synthetic challenge. While a small family of materials based on inert ions has been prepared (<i>i.e.</i> Cr(III)-based MIL-100, MIL-101, and [Ru<sub>6</sub>(btc)<sub>4</sub>Cl<sub>3</sub>]), general strategies that enable reticular synthesis have not been reported. Here we describe the mechanochemical synthesis of a reticular family of crystalline Ru<sub>2</sub>[II,III]-based materials by polymerization of molecular Ru<sub>2</sub> complexes, featuring unprotected carboxylic acid substituents, with Cu(OAc)<sub>2</sub>. The resulting crystalline heterobimetallic MOFs are solid-solutions of Ru<sub>2</sub> and Cu<sub>2</sub> sites housed within [M<sub>3</sub>L<sub>2</sub>] phases. The developed mechanochemical strategy is modular and allows for control of the primary coordination sphere of the Ru<sub>2</sub> sites. We anticipate the strategy will provide a rational approach to incorporation of kinetically inert ions in porous crystalline coordination networks, generating a class of atomically precise mixed-metal materials.

scholarly journals Plasticity in zwitterionic drugs: the bending properties of Pregabalin and Gabapentin and their hydrates

IUCrJ ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 630-634 ◽  
Author(s):  
U. B. Rao Khandavilli ◽  
Matteo Lusi ◽  
Patrick J. Frawley
Keyword(s):  
Mechanical Properties ◽  
Crystal Engineering ◽  
Weak Interactions ◽  
Molecular Crystals ◽  
Structural Features ◽  
Microscopic Structure ◽  
Bending Properties ◽  
Crystalline Materials ◽  
Area Of Interest ◽  
Macroscopic Plasticity

The investigation of mechanical properties in molecular crystals is emerging as a novel area of interest in crystal engineering. Indeed, good mechanical properties are required to manufacture pharmaceutical and technologically relevant substances into usable products. In such endeavour, bendable single crystals help to correlate microscopic structure to macroscopic properties for potential design. The hydrate forms of two anticonvulsant zwitterionic drugs, Pregabalin and Gabapentin, are two examples of crystalline materials that show macroscopic plasticity. The direct comparison of these structures with those of their anhydrous counterparts, which are brittle, suggests that the presence of water is critical for plasticity. In contrast, structural features such as molecular packing and anisotropic distribution of strong and weak interactions seem less important.

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