Investigation of 4-(Nitrophenylamino)Pent-3-En-2-Ones and 4-(Nitrobenzylamino)Pent-3-en-2-Ones by Electron Ionization Mass Spectrometry. Observation of Characteristic <i>Ortho</i> Effects

Frański, Rafał; Gierczyk, Błażej; Fiedorow, Piotr; Chadyniak, Dariusz; Urbaniak, W.

doi:10.1255/ejms.579

Cited by 3 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Keep in mind, though, that these scans can also be combined with a collision cell placed between the two sectors for CID. Beynon et al ,20 in the early 1970s, used a reverse geometry sector instrument (BE geometry) for mass‐analysed ion kinetic energy spectroscopy (MIKES), which is still employed today for specific applications 21, 22. Recall that at the source outlet, every singly charged species has equal kinetic energy, which is constant throughout its flight.…”

Section: Metastable Ion Decompositionsmentioning

confidence: 99%

Ion activation methods for tandem mass spectrometry

2004

View full text Add to dashboard Cite

This tutorial presents the most common ion activation techniques employed in tandem mass spectrometry. In-source fragmentation and metastable ion decompositions, as well as the general theory of unimolecular dissociations of ions, are initially discussed. This is followed by tandem mass spectrometry, which implies that the activation of ions is distinct from the ionization step, and that the precursor and product ions are both characterized independently by their mass/charge ratios. In collision-induced dissociation (CID), activation of the selected ions occurs by collision(s) with neutral gas molecules in a collision cell. This experiment can be done at high (keV) collision energies, using tandem sector and time-of-flight instruments, or at low (eV range) energies, in tandem quadrupole and ion trapping instruments. It can be performed using either single or multiple collisions with a selected gas and each of these factors influences the distribution of internal energy that the activated ion will possess. While CID remains the most common ion activation technique employed in analytical laboratories today, several new methods have become increasingly useful for specific applications. More recent techniques are examined and their differences, advantages and disadvantages are described in comparison with CID. Collisional activation upon impact of precursor ions on solid surfaces, surface-induced dissociation (SID), is gaining importance as an alternative to gas targets and has been implemented in several different types of mass spectrometers. Furthermore, unique fragmentation mechanisms of multiply-charged species can be studied by electron-capture dissociation (ECD). The ECD technique has been recognized as an efficient means to study non-covalent interactions and to gain sequence information in proteomics applications. Trapping instruments, such as quadrupole ion traps and Fourier transform ion cyclotron resonance instruments, are particularly useful for the photoactivation of ions, specifically for fragmentation of precursor ions by infrared multiphoton dissociation (IRMPD). IRMPD is a non-selective activation method and usually yields rich fragmentation spectra. Lastly, blackbody infrared radiative dissociation is presented with a focus on determining activation energies and other important parameters for the characterization of fragmentation pathways. The individual methods are presented so as to facilitate the understanding of each mechanism of activation and their particular advantages and representative applications.

show abstract

Section: Metastable Ion Decompositionsmentioning

confidence: 99%

Ion activation methods for tandem mass spectrometry

2004

View full text Add to dashboard Cite

show abstract

“…This indicates that a chemical compound has formed, characterized by the composition: (CH 3 CH 2 O) 3 SiCH 2 CH 2 CH 2 N=C(CH 3 )CH 2 COCH 3 , and the structure presented in Figure 3. The compound can coexist in three tautomeric forms, similarly to the aminoketone derivatives of acetylacetone [21,[23][24].…”

Section: Synthesis Of Triethoxy(ketoimino)silanementioning

confidence: 99%

“…The typical amount of silane used is between 0.1 and 1.5% with respect to the treated filler weight and allows for a monolayer coating of the material. Fillers that can be efficiently coated with silanes are, for example, silica, quartz, aluminum hydroxide, talc, calcium carbonates, inorganic oxides and many more [19][20][21].…”

mentioning

confidence: 99%

See 1 more Smart Citation

The improvement in properties of polyester resin-based composites using a new type of silane coupling agent

Urbaniak

Bednarek

Paukszta

et al. 2023

View full text Add to dashboard Cite

Adhesion between the polymer matrix and fillers is an important factor influencing the properties of the obtained composites. One way to improve interactions at the interface is to modify the filler with coupling agents, e.g., silanes. The article presents the effect of modifying the surface of the mineral filler with a new type of silane [triethoxy(ketoimino)silane] on the mechanical properties of polyester resin based composites. Composites with triethoxy(ketoimino)silane-modified filler had similar mechanical properties to composites obtained with commercial silanes, with slightly lower water absorption.

show abstract

Current literature in mass spectrometry

2004

J. Mass Spectrom.

View full text Add to dashboard Cite

Surface analysis: Two‐dimensional infrared spectroscopy (2D‐IR) was used to probe amide and carboxylate functional groups in the vicinity of gold nanoparticles and their aggregates. The data presented shows that the unique ability of 2D‐IR spectroscopy to characterize broadening mechanisms and cross peaks offers new insights into gold nanoparticle capping layer structure and dynamics (see picture).

show abstract

Investigation of 4-(Nitrophenylamino)Pent-3-En-2-Ones and 4-(Nitrobenzylamino)Pent-3-en-2-Ones by Electron Ionization Mass Spectrometry. Observation of Characteristic Ortho Effects

Cited by 3 publications

References 29 publications

Ion activation methods for tandem mass spectrometry

Ion activation methods for tandem mass spectrometry

The improvement in properties of polyester resin-based composites using a new type of silane coupling agent

Current literature in mass spectrometry

Contact Info

Product

Resources

About