Transcript template
Title
Authors
Page Title
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Text in 32 pt or smaller down to 20 pt
Avoid too many colors
Avoid too many animations
No typos
Correct scientific language
ChemDraw drawings
•in ChemDraw, use ACS settings
•copy drawing to presentation and reduce size to 90%
One X-ray structure per slide
Tables showing only minimal/necessary data
Spectra made with Origin
•Use 2 pt line thickness in Origin
•Reduce graph size in presentation to 70%
R
N
R
N
N
N
S
N
S
N
S
N
S
N
N
N
N
N
Cl
N
S
S
R
S
R
Chemistry and properties of Ln(III)
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Oxidation state +III is most common
Hard acids
Prefer hard donor atoms O>N>>P,S
Large cations
Large coordination numbers
– Core 4f electrons
– Omnidirectional/ionic bonding
– Coordination numbers dictated by steric bulk of ligands
• Similar ionic radii
• Magnetism
• Light emission due to f-f transitions
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Core 4f orbitals
Characteristic emission colors
Sharp emission bands
f-f transitions forbidden by selection rules
CN 6:
rion Ce3+=115.0 pm
rion Lu3+=100.1 pm
Antenna effect
Emission colors
Eu(III)
5D →7F
0
2
~615 nm
Tm(III)
Tb(III)
5D →7F
4
5
~545 nm
1G
3H
6
4→
~480 nm
Acknowledgments
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Undergraduate students