From Novice to Expert: Enhancing Chemical …...CHE20002 Spectroscopic Methods 1 st Year 2 nd Year 3...
Transcript of From Novice to Expert: Enhancing Chemical …...CHE20002 Spectroscopic Methods 1 st Year 2 nd Year 3...
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From Novice to Expert: Enhancing Chemical Science
Students’ Handling of Spectral Data
Dr. Richard J. Darton & Dr. Katherine J. Haxton School of Physical and Geographical Sciences
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Data Handling
Problem: • Handling spectroscopic information is a key skill• Translating the techniques used by experts into
the lecture theatre can be a challenging and frustrating task for students and staff alike.
Solution:• Real & simulated data, challenging real problems,
and demonstrating how experts approach the problems…
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CHE20002Spectroscopic Methods
1st Year
2nd Year
3rd Year
CHE20001Organic SynthesisNMR, IR Product Characterisation
CHE20003Organometallic Chemistry
IR and Raman Electronic Spectroscopy
NMR
CHE20004/6Group Theory
IR/Raman
CHE30032Advanced Chemical Analysis
CHE30030/2Research Projects
CHE10043Organic Chemistry
IR, NMR Interpretation
CHE10041Inorganic ChemistryUV Spectroscopy of
metal complexes
Chemistry Modules…
CHE10035/36VSEPR Theory
DipolesEM Radiation
IR, UV-Vis, NMR
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Level 2: Spectroscopic Methods
• Ease of annotation of spectroscopic data in lectures
• Problem solving exercises• 3 new laboratory experiments
8 6 4 2 0Chemical Shift (ppm)
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X-ray Diffraction Assignment - Old
Reflection θ Sin2 θ Ratio Miller Indices
1 9.645 º
2 13.705 º
3 16.870 º
4 19.575 º
5 22.000 º
6 24.230 º
7 26.310 º
An inorganic salt crystallizes in a cubic unit cell. The θ values of the first seven
reflections in the powder x-ray diffraction pattern of the salt, obtained using Cu Kαx-radiation, 154.2 pm, are observed as
given in the table below.Assign Miller indices to each reflection (complete the table below) and give the
Bravais Lattice of the compound.
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X-ray Diffraction Assignment - New
0
20000
40000
60000
80000
100000
120000
140000
0 20 40 60 80
inte
nsity
2 theta
Assign Miller indices to each reflection in the XRD pattern and determine the Bravais Lattice of the compound.
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Example of Annotated Notes
29Si and 1H NMR of SiH4
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“tablet! Saves me money on
printing costs so I can buy helpful
books! Yay!”
2nd Year Chemistry - Feedback
“Zeolite practical interesting”
“use of the tablet pc and availability
of annotated notes after on
webCT”
“annotated notes being available on webCT was very
helpful”
“using the NMR machine
a lot”
“the touch screen laptop was an excellent
part of the module, made it more interactive”
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Evaluation: CHE-20002
2008/09, 31 students 2009/10, 43 students
Attempts Average Attempts Average
XRD 55% 56% 72% 71%
NMR 6% 16% 81% 49%
IR 42% 24% 49% 45%
Final examination questions on inorganic spectroscopy –comparison limited by varying question length (10 or 25 marks).
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• Introduction to spectroscopy for first years– Simulated ‘perfect’ NMR spectra for problem
solving activities – Easy annotation of spectral data within lectures– Real IR and UV-Visible spectra– Introduction of high quality spectra into exam
questions
Level 1: Chemistry & Forensics
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Example of Annotated Notes
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Level 3: Advanced Chemical Analysis
Expert approach to problem solving : theoretical & practical
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Level 3: Advanced Chemical Analysis
• Application of real and simulated complex spectral data
• Research based scenarios
• 3 new formative laboratoryexperiments
• Establishment of a library of 2-dimensional spectra (novice → expert)
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Further Work
• More integrated data sets for 2010/11– Multiple techniques for 1 molecule– How to interpret data from multiple sources
• Greater range of authentic or simulated data• Improve usage of Tablet PC• Finding suitable archive formats for data
– Keele digital repository
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Summary
• Successful use of Tablet PC in wide range of teaching environments
• Authentic data