HIGH-RESOLUTION COHERENT THREE-DIMENSIONAL SPECTROSCOPY OF IODINE

Slides:



Advertisements
Similar presentations
Complementary Use of Modern Spectroscopy and Theory in the Study of Rovibrational Levels of BF 3 Robynne Kirkpatrick a, Tony Masiello b, Alfons Weber c,
Advertisements

Infrared Spectroscopy
High Resolution Coherent 3D Spectroscopy of Bromine Benjamin R. Strangfeld Georgia Institute of Technology, Atlanta, GA Peter C. Chen, Thresa A. Wells,
Raman Spectroscopy A) Introduction IR Raman
64th OSU International Symposium on Molecular Spectroscopy June 22-26, 2009 José Luis Doménech Instituto de Estructura de la Materia 1 MEASUREMENT OF ROTATIONAL.
Visible and IR Absorption Spectroscopy Andrew Rouff and Kyle Chau.
INDEX OF HYDROGEN DEFICIENCY THE BASIC THEORY OF THE BASIC THEORY OF INFRARED SPECTROSCOPY and.
The Hydrogen Spectrum Experiment 6 amplitude Wavelength -λ.
Molecular Fluorescence Spectroscopy
Ultraviolet and Visible Spectroscopy Chemical Ideas 6.8.
Spectrophotometry Chapter 17, Harris
Condensed phase vs. Isolated gas phase spectra Solution phase A A A A A A W W W W W WW W W W W W W W W W W W: water A: sample ( nm) ( nm) Isolated.
17.1 Mass Spectrometry Learning Objectives:
Low Temperature Photon Echo Measurements of Organic Dyes in Thin Polymer Films Richard Metzler ‘06, Eliza Blair ‘07, and Carl Grossman, Department of Physics.
Lecture 5 An Introduction to Spectroscopy Electromagnetic radiation, electromagnetic wave Emission, absorption, fluorescence.
Atomic Absorption Spectroscopy
AN INTRODUCTION TO HIGH RESOLUTION COHERENT MULTIDIMENSIONAL SPECTROSCOPY New 2D and 3D tools for dealing with severe rotational congestion Peter C. Chen,
Optical Pumping Within a Laser-Induced Plasma to Enhance Trace Element Signal Intensity Anthony Piazza, Russell Putnam, Dylan Malenfant, Steven J. Rehse.
Time out—states and transitions Spectroscopy—transitions between energy states of a molecule excited by absorption or emission of a photon h =  E = E.
Common types of spectroscopy
 PART Requirements for Spectroscopic Techniques for Polymers 1. High resolution 2. High sensitivity (>1%) 3. High selectivity between molecular.
Physical and Chemical Tests 10-1 Purification: Chromatography Distillation Recrystallization Comparison to known compounds: Melting point Boiling point.
LASER Induced Fluorescence of Iodine Eðlisefnafræði 5 – 30. mars 2006 Ómar Freyr Sigurbjörnsson.
1 P1X: Optics, Waves and Lasers Lectures, Lasers and their Applications i) to understand what is meant by coherent and incoherent light sources;
Lab 12 Atomic spectra and atomic structure
Spectroscopic Line Shapes Of Broad Band Sum Frequency Generation Himali Jayathilake Igor Stiopkin, Champika Weeraman, Achani Yatawara and Alexander Benderskii.
Dispersive spectrometers measure transmission as a function of frequency (wavelength) - sequentially--same as typical CD Interferometric spectrometers.
TOPIC D: SPECTROMETRY AND SPECTROSCOPY. Mass spectrometry is used to detect isotopes. mass spectrometer uses an ionizing beam of electrons to analyze.
Optical Characterization methods Rayleigh scattering Raman scattering transmission photoluminescence excitation photons At a glance  Transmission: “untouched”
Strategies for Interpreting High Resolution Coherent Multi- Dimensional Spectra Thresa A. Wells, Peter C. Chen and Zuri R. House Spelman College, Atlanta.
Fluorometric Analysis
Sarah Newton University of Oregon Applied Physics.
States and transitions
Ch 8: Stars & the H-R Diagram  Nick Devereux 2006 Revised 9/12/2012.
Chapter 12 Infrared Spectroscopy Jo Blackburn Richland College, Dallas, TX Dallas County Community College District  2006,  Prentice Hall Organic Chemistry,
Optical Zeeman Spectroscopy of the (0,0) bands of the B 3  -X 3  and A 3  -X 3  Transitions of Titanium Monoxide, TiO Wilton L. Virgo, Prof. Timothy.
Electronic Spectroscopy of Palladium Dimer (Pd 2 ) 68th OSU International Symposium on Molecular Spectroscopy Yue Qian, Y. W. Ng and A. S-C. Cheung Department.
Electronic Transitions of Palladium Monoboride and Platinum Monoboride Y.W. Ng, H.F. Pang, Y. S. Wong, Yue Qian, and A. S-C. Cheung Department of Chemistry.
Ionization Energy Measurements and Spectroscopy of HfO and HfO+
Electronic transitions of Yttrium Monoxide Allan S.-C. Cheung, Y. W. Ng, Na Wang and A. Clark Department of Chemistry University of Hong Kong OSU International.
Two Dimensional Coherent Double Resonance Electronic Spectroscopy Ohio State University Molecular Spectroscopy Conference June 20, 2008 Peter C. Chen Department.
  Examining how much light is absorbed by a compound’s sample at various wavelengths  Spectrum peaks—  Indicates the wavelengths associated with electrons’
LASERS AND SPECTROSCOPY . EXCITING MOLECULES  Molecules can be excited using either broadband or monochromatic light. Spectra obtained using monochromatic.
Raman Spectroscopy A) Introduction IR Raman
Light, Energy, & Electrons. Discrepant Events/Questions.
Dispersed fluorescence studies of jet-cooled HCF and DCF: Vibrational Structure of the X 1 A state.
Introduction to Spectrophotometry & Beer’s Law
Infrared Resonance Enhanced Photodissociation of Au + (CO) n Complexes in the Gas Phase Joe Velasquez, III, E. Dinesh Pillai and Michael A. Duncan Department.
Fourier Transform IR Spectroscopy. Absorption peaks in an infrared absorption spectrum arise from molecular vibrations Absorbed energy causes molecular.
Schrödinger Equation – Model Systems: We have carefully considered the development of the Schrödinger equation for important model systems – the one, two.
IB NOTES: Modern Analytical Chemistry. Definitions: Qualitative Analysis: The detection of the __________________ but not the __________ of a substance.
The antibonding orbital is designated by an asterisk. Thus, the promotion of an electron from a π-bonding orbital to an antibonding (π *) orbital is indicated.
Vibrational Predissociation Spectroscopy of Homoleptic Heptacoordinate Metal Carbonyl Complexes Allen M. Ricks and Michael A. Duncan Department of Chemistry.
Assignment Methods for High N Rydberg States of CaF Vladimir S. Petrovi ć, Emily E. Fenn, and Robert W. Field Massachusetts Institute of Technology International.
Spectroscopy Atomic emission spectroscopy (AES)
Spectroscopy Utilizes the various regions of the electromagnetic spectrum to detect signal.
Chem. 133 – 3/14 Lecture.
Ultrafast Spectroscopy
INFRA RED SPECTROSCOPY
Light Amplification by Stimulated
Allen M. Ricks and Michael A. Duncan Department of Chemistry
LI: To understand the purposes of spectroscopy.
Raman Spectroscopy A) Introduction IR Raman
Frauke Schroeder and Edward R. Grant Department of Chemistry
Spectroscopy Uses emission and absorption of light by electrons moving between ground and excited state configuration, hence electronic configuration.
from W. Demtröder “Molecular Physics”
How do I get experimental information on bond lengths in simple
INFRA RED SPECTROSCOPY
Raman Spectroscopy A) Introduction IR Raman
PLASMONICS AND ITS APPLICATIONS BY RENJITH MATHEW ROY. From classical fountations to its modern applications
Presentation transcript:

HIGH-RESOLUTION COHERENT THREE-DIMENSIONAL SPECTROSCOPY OF IODINE Zuri House, Peter C. Chen, Thresa A. Wells Spelman College, Atlanta GA Benjamin R. Strangfeld Georgia Institute of Technology, Atlanta GA

Outline/Purpose Background Experimental Set- up Four Wave Mixing Processes Data Analysis Next Step Conclusion Acknowledgement s Purpose of Experiment: To explore and test a new 3 dimensional technique on Iodine

Background- Iodine Purpose of the study Understand how 3D spectroscopy can be used for molecules without known spectroscopic constants Establish a standard procedure for analyzing unknown molecules Reasons for choosing iodine Energy levels for two states involved are known and thoroughly studied (X to B transition) Simple diatomic molecule with no isotopomers Used low resolution absorption spectrum to determine roughly where to set laser

Electronic Spectra

Background Types of Spectroscopic Methods Raman, IR, UV-Vis, NMR (a few examples) Characteristics of Techniques (in heavily congested systems) 1D- highly congested 2D- less congested 3D- even less congested, and selective (see next slide) *2D and especially 3D techniques are new and innovative I λb λa λa

Data Analysis- Original Run

Resonance 3D spectroscopy is a fully resonant process When 3 beams are resonant with the levels in the molecule, a lot of light is generated and the peaks are more intense triply resonant features are more intense than > doubly > Singly

Four Wave Mixing Process 532 M S ω4 M 532 S ω4 M S 532 ω4 532 S M ω4 i ii iii iv ω4= ω532- ωS + ωM Non-linear optical process Can only be done with very intense (pulsed) lasers Taking 3 beams and overlapping them to create a new 4th beam that has its own wavelength (determined by molecule present) Detected by monochromator Which process is responsible for my results?

Experimental Set-up 3 lasers used for the Four Wave Mixing Process 532nm Nd: YAG Laser (GCR) Raman Shifters SOPO Sample 532nm Nd: YAG Laser 532 S M ω4 532nm Nd: YAG Laser (GCR) MOPO Monochromator with CCD Just like in the 2D GC example, we have more than one variable device responsible for more than one domain (in this case, two frequencies). 3 lasers used for the Four Wave Mixing Process Mopo (tunable) Sopo (broadband OPO) Can adjust to find fully resonant peaks 532nm ND: YAG laser Wavelength cannot be changed Selects J value, primarily vibrational changes

Process 4 Diagram B state, high v’ B state, low v’ X state, high v” X state, low v”

Data Analysis- Original Run

Slope of the line ω4 – (ω532 – ωS) = ωM ωM = ω4 + (ωS – ω532) Slope of lines The slope of the line which passes through all of the clusters in that particular area in the pattern was derived Slope should be 1 because the axes are ω4 vs. ωM Derivation from equation ω4 = ω532- ωS + ωM to y=mx+b ω4 – (ω532 – ωS) = ωM ωM = ω4 + (ωS – ω532) y = mx + b Used to help determine spectroscopic constants

Vertical Spacing Intercluster Relationship Indicates spacing between the excited levels within the B-state Since levels are relatively evenly spaced, levels are not approaching the dissociation limit for the B-state

Diagonal Spacing Intercluster Relationship Tells us about the spacing between the excited levels within the higher X-state Aren’t converging, so dissociation level hasn’t been reached All of this information determined is electronic and vibrational Next: find rotational information (intracluster relationship)

Intracluster relationship

Further Study Use simulation (via Excel spreadsheet) to: Tune the laser to a specific resonance and decrease the bandwidth to control the number of peaks within a cluster Employ same techniques Benjamin Strangfeld described and calculate B’s for designated triangles within a cluster Compare coherent 3D spectroscopic constant to literature values

Acknowledgements Peter Chen Thresa Wells Benjamin Strangfeld Aspiring Researchers Program NSF Grant: NSF CHE-0910232