scholarly journals A Benzothiazole-Based Fluorescent Probe for Ratiometric Detection of Al3+ and Its Application in Water Samples and Cell Imaging

2019 ◽  
Vol 20 (23) ◽  
pp. 5993 ◽  
Author(s):  
Zhen-Nan Tian ◽  
Ding-Qi Wu ◽  
Xue-Jiao Sun ◽  
Ting-Ting Liu ◽  
Zhi-Yong Xing
Keyword(s):  
1H Nmr ◽  
Color Change ◽  
Blue Shift ◽  
X Ray Diffraction ◽  
Songhua River ◽  
X Ray ◽  
Ratiometric Detection ◽  
Synergistic Mechanism ◽  
Ft Ir ◽  
Human Stromal Cells

An easily prepared benzothiazole-based probe (BHM) was prepared and characterized by general spectra, including 1H NMR, 13C NMR, HRMS, and single-crystal X-ray diffraction. Based on the synergistic mechanism of the inhabitation of intramolecular charge transfer (ICT), the BHM displayed high selectivity and sensitivity for Al3+ in DMF/H2O (v/v, 1/1) through an obvious blue-shift in the fluorescent spectrum and significant color change detected by the naked eye, respectively. The binding ratio of BHM with Al3+ was 1:1, as determined by the Job plot, and the binding details were investigated using FT-IR, 1H NMR titration, and ESI-MS analysis. Furthermore, the BHM was successfully applied in the detection of Al3+ in the Songhua River and on a test stripe. Fluorescence imaging experiments confirmed that the BHM could be used to monitor Al3+ in human stromal cells (HSC).

scholarly journals Green Approach for Synthesis of Manganese Nanoparticle using Banana Peel (Musa paradiasca) and its Characterization

2021 ◽  
Vol 2 (01) ◽  
pp. 75-82
Author(s):  
Sharmila Pradhan Amatya ◽  
Santu Shrestha ◽  
Yadav Aryal
Keyword(s):  
Color Change ◽  
Precursor Solution ◽  
Banana Peel ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Green Approach ◽  
Ft Ir ◽  
Crystalline Nature ◽  
Peel Extract

This research mainly aims at implementing green approach for synthesizing multifunctional manganese nanoparticles (MnNPs) using aqueous extract of banana peel (Musa paradiasca) and potassium permanganate (KMnO4) as the precursor. As synthesized MnNPs were confirmed initially by a color change and later on characterized by UV-visible (UV-vis) Spectrophotometer, Energy Dispersive Spectroscopy (EDX), X-ray Diffraction Spectroscopy (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). Green approach was carried at various parameters like concentration of precursor solution, reaction time, temperature, etc for optimization. The formation of MnNPs was confirmed by the presence of surface plasmon absorbance band  (450 nm) and band at 6 and 6.5 keV of EDX spectrum. Likewise, so formed MnNPs were crystalline nature depicted from the sharp peak observed at 28.5º and 41° in X-ray diffraction pattern. Various types of biomolecules associated with the banana peel extract acting as natural reducer and stabilizer were analyzed from characteristic absorption bands present in the FT-IR spectrum.

scholarly journals Synthesis and structure of 1-benzyl-5-amino-1H-tetrazole in the solid state and in solution: Combining X-ray diffraction, 1H NMR, FT–IR, and UV–Vis spectra and DFT calculations

2015 ◽  
Vol 18 (4) ◽  
pp. 422-429 ◽  
Author(s):  
Ayyaz Mahmood ◽  
Islam Ullah Khan ◽  
Ricardo L. Longo ◽  
Ahmad Irfan ◽  
Sohail Anjum Shahzad
Keyword(s):  
Solid State ◽  
Dft Calculations ◽  
1H Nmr ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

Experimental (13C NMR, 1H NMR, FT-IR, single-crystal X-ray diffraction) and DFT studies on 3,4-bis(isoproylamino)cyclobut-3-ene-1,2-dione

2011 ◽  
Vol 83 (1) ◽  
pp. 472-477 ◽  
Author(s):  
Nevin Süleymanoğlu ◽  
Reşat Ustabaş ◽  
Yelda Bingöl Alpaslan ◽  
Fatih Eyduran ◽  
Cengiz Özyürek ◽  
...  
Keyword(s):  
Single Crystal ◽  
1H Nmr ◽  
13C Nmr ◽  
Dft Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

scholarly journals Synthesis, Characterization and Photo-Physical Properties of Europium(III) and Terbium(III) Complexes with Thiosemicarbazones

2020 ◽  
Vol 32 (4) ◽  
pp. 952-958
Author(s):  
Ananya Vishwakarma ◽  
S.K. Sengupta ◽  
O.P. Pandey
Keyword(s):  
Physical Properties ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Emission Spectra ◽  
X Ray Diffraction ◽  
Excitation Spectra ◽  
X Ray ◽  
Intense Peak ◽  
Ft Ir

Europium(III) and Terbium(III) complexes of type [Eu(L)Cl(H2O)2] and [Tb(L)OAc(H2O)2] (H2L = thiosemicarbazone ligands derived from substituted thiosemicarbazide and benzil/diacetyl) were synthesized. The ligands and synthesized complexes were characterized on the basis of elemental analysis, FT-IR and 1H NMR and X-ray diffraction studies. Photo-physical properties such as excitation spectra, emission spectra and luminescence curves of complexes were investigated. The most intense peak of Eu3+ ion found at 618 nm attributed to 5D0 → 7F2 transition and peak of Tb3+ ion at 549 nm attributed to 5D4 →7F5 transition.

scholarly journals A molecular inclusion complex of atenolol with 2-hydroxypropyl-β-cyclodextrin: The production and characterization thereof

2007 ◽  
Vol 72 (8-9) ◽  
pp. 737-746 ◽  
Author(s):  
Vesna Nikolic ◽  
Ljubisa Nikolic ◽  
Mihajlo Stankovic ◽  
Agnes Kapor ◽  
Mirjana Popsavin ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
1H Nmr ◽  
13C Nmr ◽  
Chemical Shifts ◽  
13C Nmr Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Inclusion ◽  
Ft Ir ◽  
Diffraction Patterns

The molecular inclusion complex of atenolol with 2-hydroxypropyl-?-cyclodextrin was synthesized using the coprecipitation method. The complex obtained was characterized by FT-IR, 1H-NMR, 13C-NMR spectroscopy, as well as by DSC and X-ray diffraction analysis. The DSC analysis confirmed the existence of the complex with the endothermic atenolol melting peak at about 155?C disappearing. The X-ray diffraction patterns of the complex and 2-hydroxypropyl-?-cyclodextrin were very similar, thus confirming the complete inclusion of the atenolol molecule within the cavity of the 2-hydroxypropyl-?-cyclodextrin. The peaks originating from atenolol were completely absent in the diffractogram of the complex. 1H-NMR and 13C-NMR spectra showed certain changes in the chemical shifts of protons and C atoms from atenolol and 2-hydroxypropyl-?-cyclodextrin, indicating that a complex had been formed and also which protons participated in the hydrogen bonds which formed the complex. The atenolol solubility in water was improved (254 mg complex cm-3, i.e., 37.5 mg atenolol cm-3), and in pH 3 HCl solution (251 mg complex cm-3, i.e., 37 mg atenolol cm-3) when compared to pure atenolol, and even when compared to the atenolol complex with ?-cyclodextrin. The increased solubility ensures greater bioavailability of the active component and, due to the low solubility, significantly corrects for the lack of the basic active substance and, simultaneously, increases its overall therapeutic effect, combined with reduced side effects. .

scholarly journals Comparative Study of Complexes of Rare Earths and Actinides with 2,6-Bis(1,2,4-triazin-3-yl)pyridine

Inorganics ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 26 ◽  
Author(s):  
Attila Kovács ◽  
Christos Apostolidis ◽  
Olaf Walter
Keyword(s):  
Blue Shift ◽  
X Ray Diffraction ◽  
Covalent Character ◽  
Ionic Radii ◽  
X Ray ◽  
Group Iii ◽  
Exchange Correlation ◽  
Ligand Interactions ◽  
Ft Ir ◽  
Metal Ligand

Complexes of group III metals (rare earth and actinides) with 2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (BTP) have been investigated by computational (DFT) and, in limited cases, by experimental (FT-IR, X-ray) techniques with the goal of determining the characteristics of metal–ligand interactions. The DFT calculations using the M062X exchange-correlation functional revealed that metal–ligand distances correlate with the ionic radii of the metals, in agreement with available X-ray diffraction results on the Sc, Y, La, U, and Pu complexes. A related blue-shift trend could be observed in seven characteristic bands in the IR spectra associated with metal–ligand vibrations. The computations uncovered considerable charge transfer interactions, particularly in the actinide complexes, as important covalent contributions to the metal–ligand bonding. The covalent character of the metal–ligand bonds decreases in the actinides, from U to Cm.

scholarly journals Structural Characterization of Thermally Stabilized Poly(acrylonitrile) Fibers by Means of X-ray Diffraction, FT-IR Spectroscopy, and TGA Analysis

2021 ◽  
Vol 5 (2) ◽  
pp. 1-9
Author(s):  
TUBA DEMIREL ◽  
Md. Mahbubor Rahman ◽  
Ismail KARACAN
Keyword(s):  
Color Change ◽  
Thermal Stabilization ◽  
Volume Density ◽  
Amorphous Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Dehydrogenation Reactions ◽  
Tga Analysis

The structure and effects of thermally stabilized PAN original fibers were characterized utilizing a mixture of volume density, color change observations, flame tests, X-ray diffraction (XRD), infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA) measurements. The results obtained from the analysis of XRD work showed the conversion of the original molecular structure from a highly laterally ordered condition to a disordered amorphous structure. The experimental results acquired from FT-IR analysis indicated rapid and concurrent aromatization and dehydrogenation reactions assisted by the formation of oxygen-containing functional groups. TGA analysis showed a carbon yield of 72% at 1000 °C. The application and use of NH4Br pretreatment are expected to increase the productivity of carbon fiber processing at lowered cost by significantly reducing the processing time necessary for the successful completion of thermal stabilization reactions.

The Electron Effect of Aromatic Group: Control Conformation of 2-Aromatic Cyclododecanone Derivatives

2020 ◽  
Vol 24 (10) ◽  
pp. 1139-1147
Author(s):  
Yang Mingyan ◽  
Wang Daoquan ◽  
Wang Mingan
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Coupling Constants ◽  
The Other ◽  
Repulsive Interaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electron Effect ◽  
Group Control

2-Phenylcyclododecanone and 2-cyclohexylcyclododecanone derivatives were synthesized and characterized by 1H NMR, 13C NMR, HR-ESI-MS and X-ray diffraction. Their preferred conformations were analyzed by the coupling constants in the 1H NMR spectra and X-ray diffraction, which showed the skeleton ring of these derivatives containing [3333]-2-one conformation, and the phenyl groups were located at the side-exo position of [3333]-2-one conformation due to the strong π-π repulsive interaction between the π- electron of benzene ring and π-electron of carbonyl group. The cyclohexyl groups were located at the corner-syn or the side-exo position of [3333]-2-one conformation depending on the hindrance of the other substituted groups. The π-π electron effect played a crucial role in efficiently controlling the preferred conformation of 2-aromatic cyclododecanone and the other 2-aromatic macrocyclic derivatives with the similar preferred square and rectangular conformations.

scholarly journals Enhancement of Chloroprene/Natural/Butadiene Rubber Nanocomposite Properties Using Organoclays and Their Combination with Carbon Black as Fillers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1085
Author(s):  
Patricia Castaño-Rivera ◽  
Isabel Calle-Holguín ◽  
Johanna Castaño ◽  
Gustavo Cabrera-Barjas ◽  
Karen Galvez-Garrido ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
High Performance ◽  
Rubber Matrix ◽  
Butadiene Rubber ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rubber Blends ◽  
Ft Ir ◽  
Chloroprene Rubber

Organoclay nanoparticles (Cloisite® C10A, Cloisite® C15) and their combination with carbon black (N330) were studied as fillers in chloroprene/natural/butadiene rubber blends to prepare nanocomposites. The effect of filler type and load on the physical mechanical properties of nanocomposites was determined and correlated with its structure, compatibility and cure properties using Fourier Transformed Infrared (FT-IR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and rheometric analysis. Physical mechanical properties were improved by organoclays at 5–7 phr. Nanocomposites with organoclays exhibited a remarkable increase up to 46% in abrasion resistance. The improvement in properties was attributed to good organoclay dispersion in the rubber matrix and to the compatibility between them and the chloroprene rubber. Carbon black at a 40 phr load was not the optimal concentration to interact with organoclays. The present study confirmed that organoclays can be a reinforcing filler for high performance applications in rubber nanocomposites.

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