Characterization of Ionically Conductive Chalcogenide Glasses

1988 ◽  
Vol 135 ◽  
Author(s):  
John H. Kennedy
Keyword(s):  
Solid State ◽  
Electrochemical Properties ◽  
Solid State Nmr ◽  
Chalcogenide Glasses ◽  
Structural Information ◽  
Chemical Properties ◽  
Synthesis Methods ◽  
Ft Ir ◽  
And Chemical Properties

AbstractThe synthesis methods and chemical properties of conducting chalcogenide glasses are reviewed with special emphasis on SiS2 -based glasses. Structural information obtained from DSC, FT-IR, and solid state NMR is discussed, as well as electrochemical properties, and the use of ionically conductive glasses in battery applications.

Theoretical and Spectroscopic Characterization of API-Related Azoles in Solution and in Solid State

2020 ◽  
Vol 26 (38) ◽  
pp. 4847-4857
Author(s):  
Marta Marín-Luna ◽  
Rosa M. Claramunt ◽  
José Elguero ◽  
Ibon Alkorta
Keyword(s):  
Solid State ◽  
Crystal Packing ◽  
Chemical Properties ◽  
Spectroscopic Characterization ◽  
Complete Characterization ◽  
Theoretical Studies ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Azoles are a family of five-membered azacyclic compounds with relevant biological and pharmacological activity. Different subclasses of azoles are defined depending on the atomic arrangement and the number of nitrogen atoms present in the ring: pyrazoles, indazoles, imidazoles, benzimidazoles, triazoles, benzotriazoles, tetrazoles and pentazoles. The complete characterization of their structure and the knowledge about their crystal packing and physical and chemical properties are of vital importance for the advancement in the design of new azole-containing drugs. In this review, we report the latest recent contributions to azole chemistry, in particular, those in which theoretical studies have been performed.

scholarly journals Spectral Characterization of Macro-Heterocyclic Compound RhTMPyP / ZnTSPc

2021 ◽  
Vol 44 (1) ◽  
pp. 59-64
Author(s):  
Liviu OLTEANU ◽  
Rodica Mariana ION ◽  
Sofia TEODORESCU ◽  
Raluca Maria ŞTIRBESCU
Keyword(s):  
Heterocyclic Compounds ◽  
Chemical Properties ◽  
Supramolecular Assembly ◽  
Spectroscopic Techniques ◽  
Raman Spectroscopic ◽  
Ft Ir ◽  
Physical And Chemical ◽  
Ir And Raman ◽  
And Chemical Properties

Macro-heterocyclic compounds, such as porphyrins and phthalocyanines, are being studied extensively for their important physical and chemical properties. Their ability to absorb light throughout the spectrum and self-organization being adequate for the realization of several applications. Investigations of the spectral properties of the supramolecular assembly RhTMPyP/ ZnTSPc- 5,10,15,20 rhodium tetramethyl-pyridyl porphyrin / 2,9,16,23 zinc tetrasulfonated-phthalocyanine are registered by UV-Vis, FT-IR and Raman spectroscopic techniques.

scholarly journals Expression and characterization of a potential exopolysaccharide from a newly isolated halophilic thermotolerant bacteriaHalomonas nitroreducensstrain WB1

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4684 ◽  
Author(s):  
Arpitha Chikkanna ◽  
Devanita Ghosh ◽  
Abhinoy Kishore
Keyword(s):  
Binding Capacity ◽  
Stationary Phases ◽  
Chemical Properties ◽  
Industrial Applications ◽  
Malt Extract ◽  
Temperate Region ◽  
Ft Ir ◽  
Physical And Chemical ◽  
And Chemical Properties

The halophilic bacterial strain WB1 isolated from a hydrothermal vent was taxonomically characterized using multiple proxies, asHalomonas nitroreducensstrain WB1. When grown on malt extract/yeast extract (MY) medium, it produced large quantities of exopolysaccharide (EPS). The polymer was synthesized at a higher rate during the log and early stationary phases. The anionic polysaccharide is primarily composed of glucose, mannose, and galactose. The studied EPS was highly viscous and had pseudoplastic nature. The EPS was found to be a mixture of three polysaccharides under FT-IR, which makes it less labile to environmental diagenesis. It also has emulsifying and antioxidant activity along with the binding capacity to heavy metals. The EPS has unique and interesting physical and chemical properties, which are different from earlier reported exo-polysaccharides produced by different bacterial genus. This suggests that the extreme geological niches like hypersaline, hyperthermal, hypothermal, and oligophilic environments, which are not well studied so far, can offer extensive and potential resources for medical, biotechnological and industrial applications. The study clearly showed that the thermal springs from the temperate region can be a potent source of many such industrially important microbial genera and need further detailed studies to be carried out.

scholarly journals Synthesis and Characterization of Some New Tropylidene Derivatives and Studying their Biological Activities

2021 ◽  
pp. 3307-3322
Author(s):  
Muath Jabbar Tarfa Al-Abbasee ◽  
Ahmood khalaf Jebur ◽  
Afraa Sabir Shihab
Keyword(s):  
Melting Point ◽  
Biological Activities ◽  
Chemical Properties ◽  
Synthesis And Characterization ◽  
Antibacterial And Antifungal Activities ◽  
Ft Ir ◽  
Antibacterial And Antifungal ◽  
And Chemical Properties

    Some new tropylidene derivatives were prepared in this work and their in vitro antibacterial and antifungal activities were studied. All the prepared compounds were characterized by their physical properties, such as melting point and color, and chemical properties, using the techniques of FT-IR, 1H-NMR and 13C-NMR.

scholarly journals Synthesis, Fabrication, and Characterization of Functionalized Polydiacetylene Containing Cellulose Nanofibrous Composites for Colorimetric Sensing of Organophosphate Compounds

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1869
Author(s):  
A K M Mashud Alam ◽  
Donovan Jenks ◽  
George A. Kraus ◽  
Chunhui Xiang
Keyword(s):  
Solid State ◽  
Hydroxyl Groups ◽  
Colorimetric Sensing ◽  
Electrospinning Technique ◽  
Hazardous Chemical ◽  
Tensile Tester ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Landmark Study

Organophosphate (OP) compounds, a family of highly hazardous chemical compounds included in nerve agents and pesticides, have been linked to more than 250,000 annual deaths connected to various chronic diseases. However, a solid-state sensing system that is able to be integrated into a clothing system is rare in the literature. This study aims to develop a nanofiber-based solid-state polymeric material as a soft sensor to detect OP compounds present in the environment. Esters of polydiacetylene were synthesized and incorporated into a cellulose acetate nanocomposite fibrous assembly developed with an electrospinning technique, which was then hydrolyzed to generate more hydroxyl groups for OP binding. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), Instron® tensile tester, contact angle analyzer, and UV–Vis spectroscopy were employed for characterizations. Upon hydrolysis, polydiacetylene esters in the cellulosic fiber matrix were found unaffected by hydrolysis treatment, which made the composites suitable for OP sensing. Furthermore, the nanofibrous (NF) composites exhibited tensile properties suitable to be used as a textile material. Finally, the NF composites exhibited colorimetric sensing of OP, which is visible to the naked eye. This research is a landmark study toward the development of OP sensing in a protective clothing system.

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