scholarly journals Synthesis and characterization of novel substituted spiro[isobenzofuran-1(3H), 9’-xanthene]-3-ones

2005 ◽  
Vol 70 (7) ◽  
pp. 931-936 ◽  
Author(s):  
Sachin.V. Patel ◽  
Manish Patel ◽  
Rangan Patel
Keyword(s):  
Melting Point ◽  
Nmr Spectroscopy ◽  
Benzoic Acid ◽  
Synthesis And Characterization ◽  
Acidic Media ◽  
Melting Point Determination ◽  
Infra Red ◽  
Point Determination ◽  
Uv Visible

The ketoacid, 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid, prepared from N,N-diethyl-m-aminophenol and phthalic anhydride, was reacted with various substituted 3-[6-methoxybenzothiazol-2-yl]-4(3H)-quinazolinones in the presence of a dehydration condensing agent to afford novel spiro[isobenzofuran-1(3H),9?-xanthene]-3-ones. The benzothiazolyl quinazolinones were synthesized by reacting 2-amino-6-methoxybenzothiazole with various substituted benzoxazinones. All compounds were characterized by melting point determination, elemental analysis, infra- red spectroscopy NMR-spectroscopy and UV-visible sprectroscopy. All the fluoran compounds are colourless or nearly colourless and produce colour in the presence of acidic media.

A PRACTICAL METHOD FOR ESTIMATION OF URINARY PREGNANEDIOL AND ALLOPREGNANEDIOL USING THIN LAYER CHROMATOGRAPHY

1965 ◽  
Vol 49 (1) ◽  
pp. 97-106 ◽  
Author(s):  
S. Sulimovici ◽  
B. Lunenfeld ◽  
M. C. Shelesnyak
Keyword(s):  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Practical Method ◽  
Melting Point Determination ◽  
Uv Absorption Spectra ◽  
Infra Red ◽  
Point Determination ◽  
Layer Chromatography ◽  
Hydrolysis Of

ABSTRACT A method is described for the assay of urinary pregnanediol and allopregnanediol which employs acid hydrolysis of pregnanediol glucuronide, ascending thin-layer chromatography and spectrophotometric quantitation of the eluted pregnanediol and allopregnanediol. The reliability of the method was established by analysis of infra-red and UV absorption spectra, melting point determination, recovery experiments, duplicate assays and comparison with the Klopper method. The method has advantages in that it is rapid and requires small urine samples.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF C-HEXYL CALIX[4]RESORCINARENA FROM RESORCINOL-HEPTANAL CONDENSATION

2016 ◽  
Vol 10 (1) ◽  
pp. 49
Author(s):  
Desi Suci Handayani ◽  
Zainal Arifin Almaqqomul Amin ◽  
Triana Kusumaningsih ◽  
Abu Masykur
Keyword(s):  
Melting Point ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Chemical Shifts ◽  
Condensation Reaction ◽  
Wave Number ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Brown Powder

<p>Synthesis of  C-hexyl  calix[4]resorcinarene  through condensation reaction between resorcinol  and  heptanal  with  HCl  catalyst  has  been  investigated.  Synthesis  conducted  by the ratio of resorcinol: heptanal (1:1) using reflux for 6 hours in ethanol. Structural  analysis of  the  product  was  done  by  FTIR  and 1 H-NMR  spectroscopy,  while  the  characterization was  done  by  determining  melting  point.  The  product  was  golden  brown  powder  with  a yield 99.43%  and  melting point more than 300 °C.  Structural analysis with FTIR and 1 HNMR  known  vibration  and  signals  characteristic  of  calix[4]resorcinarena  group, the vibrations of the CH  bridge. Vibration of CH bridge appearance at wave number 1445 cm<sup>-1</sup> and 1456  cm<sup>-1</sup>, while signal of CH bridge appearance at chemical shifts from  4.17 to 4.21 ppm.</p>

SYNTHESIS AND CHARACTERIZATION OF C-HEXYL CALIX[4]RESORCINARENA FROM RESORCINOL-HEPTANAL CONDENSATION

2014 ◽  
Vol 10 (1) ◽  
pp. 49
Author(s):  
Desi Suci Handayani
Keyword(s):  
Melting Point ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Chemical Shifts ◽  
Condensation Reaction ◽  
Wave Number ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Brown Powder

<p>Synthesis of C-hexyl calix[4]resorcinarene through condensation reaction between resorcinol and heptanal with HCl catalyst has been investigated. Synthesis conducted by the ratio of resorcinol: heptanal (1:1) using reflux for 6 hours in ethanol. Structural analysis of the product was done by FTIR and <sup>1</sup>H-NMR spectroscopy, while the characterization was done by determining melting point. The product was golden brown powder with a yield 99.43% and melting point more than 300 °C. Structural analysis with FTIR and <sup>1</sup>H-NMR known vibration and signals characteristic of calix[4]resorcinarena group,the vibrations of the CH bridge. Vibration of CH bridge appearance at wave number 1445 cm<sup>-1</sup> and 1456 cm<sup>-1</sup>, while signal of CH bridge appearance at chemical shifts from 4.17 to 4.21 ppm.</p>

Synthesis, Characterization and Neurotoxicity Screening of Schiff Base Ligands and their Complexes

2012 ◽  
Vol 554-556 ◽  
pp. 938-943
Author(s):  
Ahmad Fauzi Abu Bakar ◽  
Hadariah Bahron ◽  
Karimah Kassim
Keyword(s):  
Magnetic Susceptibility ◽  
Schiff Base ◽  
Melting Point ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Elemental Analysis ◽  
1H Nmr Spectroscopy ◽  
Schiff Base Ligands ◽  
Melting Point Determination ◽  
Point Determination

Two ligands and four complexes are successfully synthesized by reacting 1,8-diaminonapthelene with aldehyde/ketone derivatives in ratio amine:aldehyde/ketone (1:2) for ligands formation and 1:1 ratio (ligand:metals) for complexes formation. The compounds were characterized through CHNS elemental analysis, IR spectroscopy, 1H NMR spectroscopy, melting point determination, and magnetic susceptibility determination. The neurotoxicity screening of compounds was screened using neuroblastoma SH-SY5Y cell lines and it was indicate the cells were non-toxic either for ligands and complexes after 24 hours exposure.

scholarly journals SINTESIS DAN UJI AKTIVITAS ANALGETIKA-ANTIINFLAMASI SENYAWA N-(4t-butilbenzoil)-p-aminofenol

Molekul ◽  
2006 ◽  
Vol 1 (1) ◽  
pp. 36
Author(s):  
Sri Sutji Susilowati ◽  
Santi Nur Handayani
Keyword(s):  
Mass Spectrometry ◽  
Melting Point ◽  
Analgesic Activity ◽  
Inflammatory Activity ◽  
Melting Point Determination ◽  
Infra Red ◽  
Point Determination ◽  
Synthesis Yield ◽  
Edema Inhibition

The synthesis of N-4t-butyl benzoil-p-aminophenol has been done by reacting p-aminophenol and N-4t-butyl benzoil chloride compounds, then the products were isolated and analyzed by TLC, melting point determination, UV/Vis Spectrofotometry, infra red spectrofotometry and mass spectrometry. The synthesis yield of N-4t-butylbenzoil-p-aminophenol was 33,52%, with the compound melting point between 192-194 oCThe determination of analgesic (ED50 of % analgesic activity ) and anti inflammatory activity (ED50 of edema inhibition) gave the ED50 of % analgesic activity was 144 mg/kg and ED50 of % edema inhibition was 43,24 mg/kg.

scholarly journals Synthesis and characterization of ether linkage containing bis-fluoran compounds

2003 ◽  
Vol 68 (8-9) ◽  
pp. 607-613 ◽  
Author(s):  
Ritesh Patel ◽  
Jignesh Patel ◽  
Manish Patel ◽  
Rawan Patel
Keyword(s):  
Acetic Acid ◽  
Organic Solvent ◽  
Potassium Carbonate ◽  
Synthesis And Characterization ◽  
Dimethyl Formamide ◽  
Visible Spectroscopy ◽  
Acidic Media ◽  
Ether Linkage ◽  
Uv Visible

2?-chloro-6?-diethylaminofluoran and 2?-chloro-3?-methyl-6?-diethylaminofluoran were reacted with various diphenols in dimethyl formamide in the presence of potassium carbonate to give the related bisfluoran compounds. All the synthesized derivatives were identified by conventional methods (IR, 1H-NMR), elemental analysis and UV-visible spectroscopy in organic solvent and 95 % acetic acid. All the fluoran compounds change their color in acidic media.

scholarly journals BIODEGRADASI POLIETILENA MENGGUNAKAN BAKTERI DARI TPA (TEMPAT PEMBUANGAN AKHIR) GUNUNG TUGEL KABUPATEN BANYUMAS

Molekul ◽  
2007 ◽  
Vol 2 (2) ◽  
pp. 98 ◽  
Author(s):  
Zusfahair Zusfahair ◽  
Puji Lestari ◽  
Dian Riana Ningsih ◽  
Senny Widyaningsih
Keyword(s):  
Weight Loss ◽  
Melting Point ◽  
Soil Bacteria ◽  
High Potency ◽  
Melting Point Determination ◽  
Weight Loss Percentage ◽  
Thin Film Characterization ◽  
Point Determination ◽  
Successful Production

Plastic has high potency to become material that much threats human living in this earth, because made from chemical which cannot degraded by microbes in environment. The successful production and marketing of biodegradable plastics will help alleviate the problem of environmental pollution. One of biodegradable plastic that used in our live is polyethylene. This research reveals that local microbes capable to degrading of polyethylene. Biodegradation test was carried out by using bacteria in soil which was obtained from Gunung Tugel disposal center, Banyumas regency. Kind of polyethylene is LDPE (Low Density Polyethylene) which was obtained from Setiakawan Plastic Factory, Kalibogor, Purwokerto formed to thin film. Characterization of the polyethylene used weight loss percentage method, melting point determination and FTIR. Soil bacteria isolated from Gunung Tugel disposal center, Banyumas regency, obtained 5 single colonies, which coded GT. Bacteria isolate which have highest activity in degrading polyethylene was GT 3, with increasing the time of incubation. Weight loss percentage up to 2.33% in 1 month. Melting point of polyethylene after biodegradation was decreased that initially 210-220 °C into 210-213 °C. FTIR spectrophotometer result of polyethylene after biodegradation showed intensity for methylene and methyl cluster was decreased.

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

2021 ◽  
pp. 0887302X2110094
Author(s):  
V. Mamtha ◽  
H. N. Narasimha Murthy ◽  
V. Pujith Raj ◽  
Prashantha Tejas ◽  
C. S. Puneet ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Melting Point ◽  
Protective Clothing ◽  
Electrospun Nanofibers ◽  
Synthesis And Characterization ◽  
Zone Of Inhibition ◽  
Solution Combustion ◽  
E Coli ◽  
Afterglow Time

Antibacterial activity and fire retardation are equally desired for protective clothing. For achieving this, AgNP and MgO are independently researched as nanofillers in Polyurethane based electrospun nanofibers and their synergistic effect is scarcely addressed. This article reports synthesis and characterization of MgO of 70.01 nm and AgNP of 51 to 76 nm by solution combustion and hydrothermal routes respectively and their incorporation in electrospinning of Polyurethane. Flow rate 1 ml/hr, applied voltage 13 kV, tip to collector distance 15 cm were adopted for the electrospinning. Nanofibers of 65 nm were obtained for PU/MgO (3 wt. %) and 106 nm for PU/MgO (3 wt. %)/Ag (1 wt. %). Addition of MgO increased the melting point, after flame time and afterglow time. Incorporation of AgNP improved antibacterial activity. PU/MgO/Ag (2 wt. %) exhibited zone of inhibition of 2.1 cm and 3 cm against E. Coli and S. Aureus, respectively.

Synthesis and characterization of nano-scale terbium-benzoic acid luminescent complex

2007 ◽  
Author(s):  
Zhenfeng Cui ◽  
Huijuan Ren ◽  
Fenghua Chen ◽  
Guixia Liu ◽  
Guangyan Hong
Keyword(s):  
Benzoic Acid ◽  
Synthesis And Characterization ◽  
Nano Scale

Synthesis and characterization of polycarbodiimides by MALDI-TOF MS and NMR spectroscopy: kinetic and mechanism study

2017 ◽  
Vol 75 (6) ◽  
pp. 2657-2670
Author(s):  
Albert Morell Garcia ◽  
Francisco Medina Cabello ◽  
Antonio Torrelles Nogués
Keyword(s):  
Nmr Spectroscopy ◽  
Synthesis And Characterization ◽  
Mechanism Study ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms
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