An LDI-TOF and ESI mass spectrometry study of a series of β-substituted cationic metalloporphyrins

2001 ◽  
Vol 05 (06) ◽  
pp. 507-511 ◽  
Author(s):  
R. KACHADOURIAN ◽  
N. SRINIVASAN ◽  
C. A. HANEY ◽  
R. D. STEVENS
Keyword(s):  
Mass Spectrometry ◽  
Metal Complexes ◽  
Redox State ◽  
Good Tool ◽  
Esi Ms ◽  
Mass Spectrometry Study ◽  
Esi Mass Spectrometry

A series of β-halogenated cationic metalloporphyrins were analyzed by LDI-TOF and ESI-MS. Although LDI-TOFMS reveals to be a good tool for the characterization of this family of metal-complexes, including the redox state of the metal, ESI-MS indicates in addition the relative tendency of such metal-complexes to be reduced.

Evaluation of the Lewis acidity of metal complexes using ESI mass spectrometry

2020 ◽  
Vol 26 (5) ◽  
pp. 332-340
Author(s):  
Rong Zhang ◽  
Ping-Ping Li ◽  
Ge-Ge Gu ◽  
Wei-Min Ren
Keyword(s):  
Mass Spectrometry ◽  
Metal Complexes ◽  
Density Functional ◽  
Lewis Base ◽  
Lewis Acidity ◽  
Ionization Mass ◽  
Base Pairs ◽  
Esi Ms ◽  
Tetradentate Schiff Base ◽  
Schiff Base Metal Complexes

Metal complexes have extensive applications in catalysis, however, the efficient evaluation of Lewis acidity of metal complexes is still a challenge. Herein, we report a method by using electrospray ionization mass spectrometry (ESI-MS) to evaluate the Lewis acidity of metal complexes in the presence of a reference Lewis base, in which the value of the Lewis acidity can be quantized by the bond dissociation energy (BDE) of the resultant Lewis acid-base pairs. Using this method, the Lewis acidity of tetradentate Schiff-base metal complexes (designated as salenMX), a class of common metal complexes in the homogeneous catalysis, was studied in detail. For the salenM(III)X complexes (M = Al, Cr, Fe, Co), the Lewis acidity tendency is Al > Cr > Fe > Co due to a strong affinity between the Al complex and the reference Lewis base while a weak affinity concerning on the Co complex. Additionally, the effect of ligand steric and electronic nature on the Lewis acidity was studied by using Co complex. Furthermore, density functional theory (DFT) was employed to calculate the BDE, which consists with the results obtained from ESI-MS. The ESI-MS method provides a convenient and efficient method for evaluating the Lewis acidity of metal complexes.

scholarly journals Dichlorido(η6-p-cymene)[tris(2-cyanoethyl)phosphine]ruthenium(II)

Molbank ◽  
10.3390/m1025 ◽  
2018 ◽  
Vol 2018 (4) ◽  
pp. M1025
Author(s):  
William Henderson ◽  
Ashwin Nair ◽  
Nathan Halcovich ◽  
Edward Tiekink
Keyword(s):  
Mass Spectrometry ◽  
Negative Ions ◽  
Chloride Ion ◽  
Distorted Octahedral Geometry ◽  
X Ray ◽  
X Ray Crystallography ◽  
Mass Spectrometry Study ◽  
Ruthenium Atom ◽  
Distorted Octahedral ◽  
Esi Mass Spectrometry

The tris(2-cyanoethyl)phosphine (tcep) complex [RuCl2{P(CH2CH2CN)3}(η6-p-cymene)] (p-cymene = p-CH3C6H4iPr) was synthesised by the bridge-splitting reaction of the chlorido-dimer [RuCl2(η6-p-cymene)]2 with tcep. The complex was characterised by a single-crystal X-ray structure determination as well as NMR spectroscopy, ESI mass spectrometry, and microelemental analysis. X-ray crystallography shows the ruthenium atom is coordinated by p-cymene in a η6-fashion, two chlorides and the phosphorus atom of the tcep ligand with the donor set defining a distorted octahedral geometry. The ESI mass spectrometry study reveals that the complex readily forms negative ions [M + Cl]− and [2M + Cl]− by association with a chloride ion.

Flavour characterization of red wines by descriptive analysis and ESI mass spectrometry

2010 ◽  
Vol 21 (7) ◽  
pp. 755-762 ◽  
Author(s):  
Aline C.T. Biasoto ◽  
Rodrigo R. Catharino ◽  
Gustavo B. Sanvido ◽  
Marcos N. Eberlin ◽  
Maria Aparecida A.P. da Silva
Keyword(s):  
Mass Spectrometry ◽  
Descriptive Analysis ◽  
Red Wines ◽  
Esi Mass Spectrometry

Characterization of triacylglycerols in unfermented cocoa beans by HPLC-ESI mass spectrometry

2018 ◽  
Vol 254 ◽  
pp. 232-240 ◽  
Author(s):  
Diana Sirbu ◽  
Marcello Corno ◽  
Matthias S. Ullrich ◽  
Nikolai Kuhnert
Keyword(s):  
Mass Spectrometry ◽  
Cocoa Beans ◽  
Esi Mass Spectrometry

Characterization of cyclodextrin complexes of camostat mesylate by ESI mass spectrometry and NMR spectroscopy

2009 ◽  
Vol 938 (1-3) ◽  
pp. 192-197 ◽  
Author(s):  
Soonho Kwon ◽  
Woonhyoung Lee ◽  
Hye-Jin Shin ◽  
Sung-il Yoon ◽  
Yun-tae Kim ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Cyclodextrin Complexes ◽  
Esi Mass Spectrometry

Synthesis and characterization of a new Keggin anion: [BeW12O40]6−

2014 ◽  
Vol 50 (65) ◽  
pp. 9083-9085 ◽  
Author(s):  
Alexander V. Anyushin ◽  
Anton I. Smolentsev ◽  
Dmitry A. Mainichev ◽  
Cristian Vicent ◽  
Artem L. Gushchin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Cyclic Voltammetry ◽  
Synthesis And Characterization ◽  
Keggin Anion ◽  
X Ray ◽  
Esi Mass Spectrometry

The first berillododecatungstate [BeW12O40]6− has been synthesized and characterized by X-ray analysis, cyclic voltammetry, ESI-mass spectrometry, and 9Be and 183W NMR.

Sign in / Sign up

Export Citation Format

Share Document