MS Lecture 1 - Why Spectroscopies are Needed Molecular structure Molecular properties Introduction(Spectroscopic Techniques Covered in Chem460 The

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Why Spectroscopies are Needed? Molecular structure Molecular properties Introduction (Spectroscopic Techniques Covered in Chem460) The purer, the better. It is difficult to analyze spectroscopic data of a mixture. **We focus on spectral analysis, NOT theory** Determining the Structure of Elephant, a Large Molecule "The process of structural elucidation by spectroscopic methods is deductive. One or more spectroscopic experiments are carried out, and structural conclusions are reached by analyzing the resulting data." - Lambert et al "Organic Structural Spectroscopy Pieces of information from different spectroscopic techniques. Mass Spectrometry (MS) MW Molecular formula Structural information GC-MS LC-MS MS Principles Molecule Ions Ion separation Ion collector EI (electron impact) CI(chemical) DI(desorption • FAB (fast-atom-bombardment) • MALDI (matrix-assisted laser desorption) ESI(electrospray) Molecular ion + fragments (1) Hard ionization (2) Soft ionization Based on m/z values Magnet Magnet + electric field (double focusing) Quadruple mass filter Ion trap Time-of-flight EI-MS...
View Full Document

This note was uploaded on 01/18/2012 for the course CHEM 460AB taught by Professor Sasaki during the Fall '11 term at University of Washington.

Page1 / 24

MS Lecture 1 - Why Spectroscopies are Needed Molecular structure Molecular properties Introduction(Spectroscopic Techniques Covered in Chem460 The

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online