EPR / ESR Spectroscopy - Revision history

Bes at 12:20, 9 June 2020

2020-06-09T12:20:18Z

Bes at 12:42, 1 June 2020

2020-06-01T12:42:57Z

Bes: /* Spectroscopy Basics */

2020-04-24T16:08:59Z

Spectroscopy Basics

Bes: /* Introduction */

2020-04-24T16:08:43Z

Introduction

Bes: /* Introduction */

2020-02-04T14:34:26Z

Introduction

Bes: /* Introduction */

2020-02-04T14:23:03Z

Introduction

Bes at 14:19, 4 February 2020

2020-02-04T14:19:52Z

Bes: /* Introduction */

2020-02-04T14:00:28Z

Introduction

Bes: Created page with "==Introduction== ==Instrumentation== ==Software== [http://esr.monmsci.net/wiki/index.php/EPR_Simulations_with_EasySpin EasySpin, a MATLAB plugin (prepared by Brandon Allen)]"

2020-02-04T13:53:19Z

Created page with "==Introduction== ==Instrumentation== ==Software== [http://esr.monmsci.net/wiki/index.php/EPR_Simulations_with_EasySpin EasySpin, a MATLAB plugin (prepared by Brandon Allen)]"

New page

==Introduction==

==Instrumentation==

==Software==

[http://esr.monmsci.net/wiki/index.php/EPR_Simulations_with_EasySpin EasySpin, a MATLAB plugin (prepared by Brandon Allen)]

← Older revision		Revision as of 12:20, 9 June 2020
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−	This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance) is also referred to as ESR (Electron Spin Resonance). At Monmouth College, the EPR program is lead by Professor Bradley E. Sturgeon. Brad was first exposed to ~~EPR~~ in the undergraduate chemistry laboratories at Illinois State University in ~1986. In Professor Stevenson's Physical Chemistry Lab students were required to develop glassblowing skills in order to make an apparatus to generate the naphthalene radical anion. ~~~30 years of EPR/ESR experience, researcher who study the unpaired electrons~~ in ~~organic/carbon-based molecules generally use the term ESR, whereas those who study unpaired electrons in metals use the term EPR. Some believe that the term ESR is outdated~~ and ~~that~~ the ~~term EPR should be used exclusively. Since my research experience involves the study~~ of ~~unpaired electrons in both~~ organic and ~~inorganic compounds, i use either term mainly based on the above definition~~.	+	This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance) is also referred to as ESR (Electron Spin Resonance). At Monmouth College, the EPR program is lead by Professor Bradley E. Sturgeon. Brad was first exposed to ESR in the undergraduate chemistry laboratories at Illinois State University in ~1986. In Professor Stevenson's Physical Chemistry Lab students were required to develop glassblowing skills in order to make an apparatus to generate the naphthalene radical anion; ESR data collection on a Varian E4 and splitting pattern analysis were required. During Brad's BS and MS in Chemistry at Illinois State University he worked with Professors Stevenson and Rieter on the formation of stable organic radicals using high vacuum techniques and ESR (Varian E4 and Bruker/IBM .

	==Introduction==		==Introduction==

← Older revision		Revision as of 12:42, 1 June 2020
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−	This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance) is also referred to as ESR (Electron Spin Resonance). ~~From my (bes)~~ ~20 years of EPR/ESR experience, researcher who study the unpaired electrons in organic/carbon-based molecules generally use the term ESR, whereas those who study unpaired electrons in metals use the term EPR. Some believe that the term ESR is outdated and that the term EPR should be used exclusively. Since my research experience involves the study of unpaired electrons in both organic and inorganic compounds, i use either term mainly based on the above definition.	+	This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance) is also referred to as ESR (Electron Spin Resonance). At Monmouth College, the EPR program is lead by Professor Bradley E. Sturgeon. Brad was first exposed to EPR in the undergraduate chemistry laboratories at Illinois State University in ~1986. In Professor Stevenson's Physical Chemistry Lab students were required to develop glassblowing skills in order to make an apparatus to generate the naphthalene radical anion. ~30 years of EPR/ESR experience, researcher who study the unpaired electrons in organic/carbon-based molecules generally use the term ESR, whereas those who study unpaired electrons in metals use the term EPR. Some believe that the term ESR is outdated and that the term EPR should be used exclusively. Since my research experience involves the study of unpaired electrons in both organic and inorganic compounds, i use either term mainly based on the above definition.

	==Introduction==		==Introduction==

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 ===Spectroscopy Basics===
-[[File:EPR Basics_01.png|400px]]
+[[File:EPR Basics_01.png|600px]]
 ==Instrumentation==

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	Stable molecular compounds have all electrons paired. In only a small number of cases do		Stable molecular compounds have all electrons paired. In only a small number of cases do
		+
		+	===Spectroscopy Basics===
		+	[[File:EPR Basics_01.png\|400px]]

	==Instrumentation==		==Instrumentation==

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 ==Introduction==
-The electron is a partless-part that is integral to all molecular structure. As taught in general chemistry, element are defined in terms of the number of protons (the atomic number, Z); these elements also have an equivalent number of electrons hence balancing the charge. Also taught in general chemistry is the octet rule, which states that non-metals like C, N, O, and F each associate with other elements in order to obtain an electron configuration of the noble gases.  For example, fluorine has 7 protons and 7 electrons and in order to obtain an electron configuration of Ne (8 e<sup>-</sup>), it must associate with one element that can provide a single electron. Hydrofluoric acid (HF) results when hydrogen associates with a fluorine atom. Additionally, a fluorine atom can associate with a second fluorine atom to result in molecular fluorine (F<sub>2</sub>). All halogens appear in their elemental form as diatomic, as does O<sub>2</sub>, N<sub>2</sub>, and H<sub>2</sub>.
+The electron is a partless-part that is integral to all molecular structure. As taught in general chemistry, element are defined in terms of the number of protons (the atomic number, Z); these elements also have an equivalent number of electrons hence balancing the charge. Also taught in general chemistry is the octet rule, which states that elements prefer 8 electrons in their outer shell. Because electrons in metals and non-metals behave slightly different, this is the origin of the terms EPR and ESR.
-Metals behave differently then do non-metals.
+'''Non-metals'''
 Stable molecular compounds have all electrons paired.  In only a small number of cases do

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-This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance)  is also referred to as ESR (Electron Spin Resonance). From my (bes) ~20 years of EPR/ESR experience, researcher who study the unpaired electrons in organic molecules generally use the term ESR, whereas those who study unpaired electrons in metals use the term EPR. Some believe that the term ESR is outdated and that the term EPR should be used exclusively.
+This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance)  is also referred to as ESR (Electron Spin Resonance). From my (bes) ~20 years of EPR/ESR experience, researcher who study the unpaired electrons in organic/carbon-based molecules generally use the term ESR, whereas those who study unpaired electrons in metals use the term EPR. Some believe that the term ESR is outdated and that the term EPR should be used exclusively. Since my research experience involves the study of unpaired electrons in both organic and inorganic compounds, i use either term mainly based on the above definition.
-−
 ==Introduction==
 ==Instrumentation==

← Older revision		Revision as of 14:00, 4 February 2020
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		+	This is the main instructional portal for EPR/ESR spectroscopy at Monmouth College. EPR (Electron Paramagnetic Resonance) is also referred to as ESR (Electron Spin Resonance). From my (bes) ~20 years of EPR/ESR experience, researcher who study the unpaired electrons in organic molecules generally use the term ESR, whereas those who study unpaired electrons in metals use the term EPR. Some believe that the term ESR is outdated and that the term EPR should be used exclusively.
		+
	==Introduction==		==Introduction==