NMR, FT-IR and ESI-MS study of new lasalocid ester with 2-(hydroxymethyl)-12-crown-4 and its complexes with monovalent cations

2005 ◽  
Vol 749 (1-3) ◽  
pp. 128-137 ◽  
Author(s):  
Radosław Pankiewicz ◽  
Grzegorz Schroeder ◽  
Bogumił Brzezinski ◽  
Franz Bartl
Keyword(s):  
Monovalent Cations ◽  
Esi Ms ◽  
Ft Ir

NMR, FT-IR, ESI MS and PM5 semiempirical study of new lasalocid 5-hydroxy-3-oxapentyl ester and its complexes with monovalent cations

2005 ◽  
Vol 733 (1-3) ◽  
pp. 155-165 ◽  
Author(s):  
Radosław Pankiewicz ◽  
Grzegorz Schroeder ◽  
Bogumił Brzezinski
Keyword(s):  
Monovalent Cations ◽  
Esi Ms ◽  
Ft Ir

1H, 13C NMR, FT-IR, ESI-MS and PM5 semiempirical study of new lasalocid ester with 3-(methylthio)-1-propanol and its complexes with monovalent cations

2007 ◽  
Vol 829 (1-3) ◽  
pp. 120-127 ◽  
Author(s):  
Radosław Pankiewicz ◽  
Grzegorz Schroeder ◽  
Bogumił Brzezinski
Keyword(s):  
13C Nmr ◽  
Monovalent Cations ◽  
Esi Ms ◽  
Ft Ir

scholarly journals A highly sensitive octopus-like azobenzene fluorescent probe for determination of abamectin B1 in apples

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhenlong Guo ◽  
YiFei Su ◽  
Kexin Li ◽  
MengYi Tang ◽  
Qiang Li ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Limit Of Detection ◽  
Quantitative Detection ◽  
Fluorescence Signal ◽  
Ionization Mass ◽  
Limit Of Quantification ◽  
Visible Absorption ◽  
Esi Ms ◽  
Relative Standard ◽  
Ft Ir

AbstractThe development of detecting residual level of abamectin B1 in apples is of great importance to public health. Herein, we synthesized a octopus-like azobenzene fluorescent probe 1,3,5-tris (5′-[(E)-(p-phenoxyazo) diazenyl)] benzene-1,3-dicarboxylic acid) benzene (TPB) for preliminary detection of abamectin B1 in apples. The TPB molecule has been characterized by ultraviolet–visible absorption spectrometry, 1H-nuclear magnetic resonance, fourier-transform infrared (FT-IR), electrospray ionization mass spectroscopy (ESI-MS) and fluorescent spectra. A proper determination condition was optimized, with limit of detection and limit of quantification of 1.3 µg L−1 and 4.4 μg L−1, respectively. The mechanism of this probe to identify abamectin B1 was illustrated in terms of undergoing aromatic nucleophilic substitution, by comparing fluorescence changes, FT-IR and ESI-MS. Furthermore, a facile quantitative detection of the residual abamectin B1 in apples was achieved. Good reproducibility was present based on relative standard deviation of 2.2%. Six carboxyl recognition sites, three azo groups and unique fluorescence signal towards abamectin B1 of this fluorescent probe demonstrated reasonable sensitivity, specificity and selectivity. The results indicate that the octopus-like azobenzene fluorescent probe can be expected to be reliable for evaluating abamectin B1 in agricultural foods.

scholarly journals Study on Soy-Based Adhesives Enhanced by Phenol Formaldehyde Cross-Linker

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 365 ◽  
Author(s):  
Zhigang Wu ◽  
Xuedong Xi ◽  
Hong Lei ◽  
Jiankun Liang ◽  
Jingjing Liao ◽  
...  
Keyword(s):  
13C Nmr ◽  
Soy Protein ◽  
Water Resistance ◽  
Phenol Formaldehyde ◽  
Ionization Mass ◽  
Model Compounds ◽  
Esi Ms ◽  
13C Nuclear Magnetic Resonance ◽  
Ft Ir ◽  
Cross Linker

To find the effects of cross-linker phenol-formaldehyde (PF) resin on the performance of soy-based adhesives, the reaction between model compounds hydroxymethyl phenol (HPF) and glutamic acid were studied in this paper. HPF prepared in laboratory conditions showed higher content of hydroxymethyl groups than normal PF resin, which was proved by the results of Electrospray Ionization Mass Spectrometry (ESI-MS) and 13C Nuclear Magnetic Resonance (13C-NMR). The results of ESI-MS, Fourier transform infrared spectroscopy (FT-IR), and 13C-NMR based on resultant products obtained from model compounds showed better water resistance of the soy protein-based adhesive modified by PF-based resin, which indicated the reaction between PF resin and soy protein. However, it seemed that the soy-based adhesive cross-linked by HPF with the maximum content of hydroxymethyl groups did not show the best water resistance.

Complexes of Schiff base of gossypol with 5-hydroxy-3-oxapentylamine and some monovalent cations studied by ESI MS as well as PM5 semiempirical methods

2003 ◽  
Vol 654 (1-3) ◽  
pp. 245-252 ◽  
Author(s):  
Piotr Przybylski ◽  
Grzegorz Bejcar ◽  
Grzegorz Schroeder ◽  
Bogumil Brzezinski
Keyword(s):  
Schiff Base ◽  
Semiempirical Methods ◽  
Monovalent Cations ◽  
Esi Ms

Structure of a new Schiff base of gossypol with 1-(3-aminopropyl)-2-pyrrolidinone studied by the X-ray, FT-IR, NMR, ESI-MS and PM5 methods

2008 ◽  
Vol 889 (1-3) ◽  
pp. 332-343 ◽  
Author(s):  
Piotr Przybylski ◽  
Krystian Pyta ◽  
Barbara Wicher ◽  
Maria Gdaniec ◽  
Bogumił Brzezinski
Keyword(s):  
Schiff Base ◽  
X Ray ◽  
Esi Ms ◽  
Ft Ir

Towards a designed synthesis of metallic nanoparticles in polyols – elucidation of the redox scheme in a cobalt–ethylene glycol system

2016 ◽  
Vol 40 (10) ◽  
pp. 8632-8642 ◽  
Author(s):  
Kazuma Takahashi ◽  
Shun Yokoyama ◽  
Takatoshi Matsumoto ◽  
Jhon L. Cuya Huaman ◽  
Hisashi Kaneko ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Ethylene Glycol ◽  
Redox Reaction ◽  
Metallic Nanoparticles ◽  
Metal Particles ◽  
Esi Ms ◽  
System P ◽  
Ft Ir ◽  
Analytical Tools ◽  
Designed Synthesis

A new redox reaction mechanism in the formation of Co metal particles using an ethylene glycol–cobalt system is proposed using NMR, ESI-MS, FT-IR and XRD as analytical tools.

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