Elemental analysis and bioactivities of Echinops echinatus Roxb. (globe thistle) via spectroscopic techniques

2019 ◽  
Vol 52 (1) ◽  
Author(s):  
Nargis Jamila ◽  
Naeem Khan ◽  
In Min Hwang ◽  
Sadiq Noor Khan
Keyword(s):  
Elemental Analysis ◽  
Spectroscopic Techniques

Synthesis, Characterization and Thermal studies of Novel Organomercury Driven from Sulfa Drugs Part 1

2011 ◽  
Vol 7 (2) ◽  
pp. 1338-1347
Author(s):  
Tarek Ali Fahad ◽  
Shaker.A.N. AL-Jadaan
Keyword(s):  
Thermal Decomposition ◽  
Thermal Behavior ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Thermal Studies ◽  
Spectroscopic Techniques ◽  
Sulfa Drugs ◽  
Acid Base ◽  
Ph Values ◽  
Multi Stage

Two new heterocyclic Organmercury compounds   were prepared from the reaction of Sulfamethaxazole and Sulfadiazine with 4-acetaminophenol as a coupler and separated as solids with characteristic colors. these compounds were characterized by F.T.IR-spectroscopy 1H-NMR , Micro-elemental Analysis and UV-Vis spectroscopic techniques . The work involves a study of acid – base properties compounds at different pH values, the ionization and protonation constants were calculated. The thermal behavior of these two compounds   were investigated on the basis of thermogravimetric (TGA) and differential thermogravimetric (DTG) analyses, Thermal decomposition of these compounds is multi-stage processes.

Synthesis of a New Dioxaspiro[bicyclo[3.3.1]nonane-oxabicyclo[6.2.0]deca- 1(10),8-dien-4-one Derivative Using Some Chemical Strategies

2020 ◽  
Vol 17 (5) ◽  
pp. 393-402
Author(s):  
Figueroa-Valverde Lauro ◽  
Rosas-Nexticapa Marcela ◽  
Lopez-Ramos Maria ◽  
Diaz Cedillo Francisco ◽  
Mateu-Armand Virginia ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
Chemical Structure ◽  
Spectroscopic Techniques ◽  
Easy Method ◽  
Chemical Strategies

There are several protocols for the preparation of bicyclic derivatives; however, some methods use dangerous and require special conditions. The aim of this study was to synthesize a new Dioxaspiro[ bicyclo[3.3.1]nonane-oxabicyclo[6.2.0]-deca-1(10), 8-dien-4-one (compound 8). Compound 8 was prepared using some reactions such as; i) etherification, ii) reduction, iii) amidation, iv) imination and v) 2+2 addition. The chemical structure of 8 and its intermediaries were completely characterized by spectroscopic techniques and elemental analysis. The synthesis showed a yield of 85% for compound 8. In this study, an easy method for the preparation of compound 8 is reported.

scholarly journals 4-vinylpyridine derivatives: Protonation, methylation and silver(I) coordination chemistry

2021 ◽  
pp. 174751982198965
Author(s):  
Guoqi Zhang
Keyword(s):  
Mass Spectrometry ◽  
Schiff Base ◽  
Coordination Chemistry ◽  
Elemental Analysis ◽  
Silver Complex ◽  
Spectroscopic Techniques ◽  
X Ray ◽  
X Ray Crystallography ◽  
Pyridine Moiety ◽  
New Compounds

( E)-4-[2-(Pyridin-4-yl)vinyl]benzaldehyde, containing both a 4-vinylpyridine and an aldehyde functionality, is utilized to develop new, highly conjugated chalcone compounds and a bis-Schiff base azine compound. The chalcone-containing compounds are further explored for their protonation, methylation and silver(I) coordination chemistry using the pyridine moiety. In parallel, a cyano-containing analogue, ( E)-4-[2-(pyridin-4-yl)vinyl]benzonitrile is also synthesized and studied for its silver(I) coordination chemistry. These new compounds are fully characterized by mass spectrometry, elemental analysis and spectroscopic techniques. The methylated product of ( E)-1-(9-anthryl)-3-{4-[2-(pyridin-4-yl)vinyl]phenyl}prop-2-en-1-one and a silver complex of ( E)-4-[2-(pyridin-4-yl)vinyl]benzonitrile are structurally determined by X-ray crystallography.

Photoluminescent Tetrazolate-based Eu(III) Complexes: An Outstanding Impact of Aromatic Phosphine Oxide Co-ligands on the Photoluminescence Quantum Yields

2014 ◽  
Vol 69 (2) ◽  
pp. 239-247 ◽  
Author(s):  
Marek Pietraszkiewicz ◽  
Suraj Mal ◽  
Oksana Pietraszkiewicz ◽  
Krzysztof Górski ◽  
Nitin Chelwani
Keyword(s):  
Phosphine Oxide ◽  
Elemental Analysis ◽  
Analytical Data ◽  
Quantum Yields ◽  
Spectroscopic Techniques ◽  
Ancillary Ligands ◽  
H Nmr ◽  
Luminescence Efficiency ◽  
The Eu ◽  
Oxygen Atoms

New ternary Eu(III) 5-(2-pyridyl-1-oxide)tetrazolate complexes with phosphine oxide co-ligands have been synthesized and characterized by elemental analysis, and IR and 1H NMR spectroscopic techniques. The analytical data revealed that these complexes are mononuclear, and the central Eu(III) ion is coordinated by three oxygen and three nitrogen atoms of the tetrazolate and two oxygen atoms from the phosphine oxide ligands. The ancillary ligands increased remarkably the luminescence efficiency of the Eu(III) tetrazolate.

scholarly journals Synthesis and characterization of novel mono, bis and tris heteroaryl chalcone derivatives of 1,3,5-trimethoxybenzene

2021 ◽  
Vol 14 (1) ◽  
pp. 39-47
Author(s):  
M. Fatih Polat ◽  
Derya Aktaş Anı
Keyword(s):  
Elemental Analysis ◽  
High Purity ◽  
Synthesis And Characterization ◽  
Spectroscopic Techniques ◽  
Reaction Conditions ◽  
Chalcone Derivatives ◽  
Ft Ir ◽  
Derivatives Of

In this study, a new series consisting of 12 heteroaryl chalcone derivatives of 1,3,5-trimethoxybenzene were synthesised. Chalcones were synthesised in high purity and efficiency, via condensation of mono, bis and tris 2,4,6-trimethoxy acetophenones with hetero-2-carbaldehyde derivatives based on Claisen Schdmit condensation. The reactions feature a good scope for the all products, mild reaction conditions and good yields. The synthesized compounds were characterized by using FT-IR, NMR and elemental analysis spectroscopic techniques.

Investigation of photophysical and photochemical properties of octa-substituted double-decker rare-earth metallophthalocyanine complexes

2012 ◽  
Vol 16 (07n08) ◽  
pp. 907-916 ◽  
Author(s):  
İlke Gürol ◽  
Mahmut Durmuş ◽  
Vefa Ahsen
Keyword(s):  
Rare Earth ◽  
Organic Solvents ◽  
Elemental Analysis ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Spectroscopic Techniques ◽  
Double Decker ◽  
Ft Ir ◽  
Photochemical Properties ◽  
First Time

For the first time, bis[octakis-(2,2,3,3-tetrafluoropropoxy)phthalocyaninato] rare-earth metal(III) double-decker phthalocyanine complexes (Pc2Sm, Pc2Eu, Pc2Gd, Pc2Dy and Pc2Lu) are synthesized. The new phthalocyanine complexes are characterized using mass, FT-IR and UV-vis spectroscopic techniques as well as elemental analysis. All these compounds exhibit excellent solubility in organic solvents. The photophysical and photochemical properties of the rare-earth metal(III) double-decker complexes are investigated and discussed.

scholarly journals Metal ion promoted synthesis of pentaazamacrocyclic complexes of a few first row transition metal series derived from 2,6-diaminopyridine

2005 ◽  
Vol 70 (11) ◽  
pp. 1273-1281
Author(s):  
Ali Khan ◽  
Shabana Tabassum ◽  
Nishat Begum ◽  
Poonam Chingsubam
Keyword(s):  
Magnetic Susceptibility ◽  
Transition Metal ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Metal Ion ◽  
Condensation Reaction ◽  
Spectroscopic Techniques ◽  
Conductivity Measurements ◽  
Template Condensation ◽  
Square Planar

Anew series of dichloro/dinitrato (2,6,9,13,18-pentaazacbicyclo [12.3.1]octadeca -1(18),14,16-triene) metal(II) [MLX2](M = Mn(II), Co(II), Ni(II) and Zn(II); X = Cl or NO3) and (2,6,9,13,18-pentaazacyclo[12.3.1]octadeca-1(18),14,16-triene) copper(II) dichloride/dinitrate [CuL]X2 (X = Cl or NO3) have been synthesized by the template condensation reaction of 2,6-diaminopyridine with 1,2-diaminoethane and 1,3-dibromopropane. The complexes were studied by elemental analysis, magnetic susceptibility and conductivity measurements. Various spectroscopic techniques, viz. IR, 1H-NMR, EPR, UV/Vis, were used to establish their structures. Except for the complexes of copper(II), which are square planar, all other complexes have octahedral structures.

scholarly journals 1,3,1',3'-(Dinaphthalene-1,8-diyl)bisthiourea

2016 ◽  
Author(s):  
Fatma Aydin
Keyword(s):  
Elemental Analysis ◽  
13C Nmr ◽  
Spectroscopic Techniques ◽  
Ft Ir

A new bisthiourea compound, 1,3,1',3'-(dinaphthalene-1,8-diyl)bisthiourea, was synthesized. Its structure was characterized by elemental analysis, FT-IR and 1H-, 13C-NMR and MS spectroscopic techniques.

scholarly journals Synthesis of α-Hydroxycarboxylic Acids from Various Aldehydes and Ketones by Direct Electrocarboxylation: A Facile, Efficient and Atom Economy Protocol

2021 ◽  
Vol 33 (4) ◽  
pp. 839-845
Author(s):  
Kishanpal Singh ◽  
Harvinder Singh Sohal ◽  
Baljit Singh
Keyword(s):  
Ammonium Chloride ◽  
Elemental Analysis ◽  
Supporting Electrolyte ◽  
Aromatic Aldehydes ◽  
Spectroscopic Techniques ◽  
Atom Economy ◽  
Hydroxycarboxylic Acids ◽  
Aldehydes And Ketones ◽  
High Level

In present work, the formation of α-hydroxycarboxylic acids have been described from various aromatic aldehydes and ketones via direct electrocarboxylation method with 80-92% of yield without any side product and can be purified by simple recrystallization using sacrificial Mg anode and Pt cathode in an undivided cell, CO2 at (1 atm) was continuously bubbled in the cell throughout the reaction using tetrapropyl-ammonium chloride as a supporting electrolyte in acetonitrile. The synthesized compounds obtained in fair to excellent yield with a high level of purity. The characterization of electrocarboxylated compounds was done with spectroscopic techniques like IR, NMR (1H & 13C), mass and elemental analysis.

scholarly journals Synthesis, Characterization, Mössbauer Parameters, and Antitumor Activity of Fe(III) Curcumin Complex

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Mutasim Ibrahim Khalil ◽  
Aisha Mohamed Al-Zahem ◽  
Maha Hamad Al-Qunaibit
Keyword(s):  
Nmr Spectroscopy ◽  
Antitumor Activity ◽  
Elemental Analysis ◽  
Magnetic Relaxation ◽  
Enol Form ◽  
Spectroscopic Techniques ◽  
H Nmr ◽  
Mössbauer Parameters ◽  
Prepared Complex ◽  
C Nmr

Curcumin-Fe(III) complex was prepared from Fe(NO3)3·9H2O precursor and curcumin by refluxing a slightly basic methanolic solution of their mixture with the objective of investigating its cytotoxicity. The enol form of curcumin ligand was established by FTIR, UV/Vis,1H NMR, and13C NMR spectroscopy. The as-prepared product was characterized by elemental analysis, FTIR, UV, and Mössbauer spectroscopic techniques. An octahedral high-spin Fe(III) complex was obtained,δ, 0.37 mms−1; Q.S., 0.79 mms−1; no magnetic relaxation was observed at liquid N2temperature, neither reduction of Fe(III). The tested cytotoxicity of the as-prepared complex on four cancer cell lines indicated inhibition of the curcumin activity upon complexing with iron.

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