Example%20of%20an%20application%20for%20electronic%20spectroscopy%20in%20coordination%20compounds:%20Solar%20Energy%20Conversion

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Example of an application for electronic
spectroscopy in coordination compounds Solar
Energy Conversion
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See Grätzel et al. J. Am. Chem. Soc. 2001, 123,
1613
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Synthesis of (dbbpy)Pt(dmid)
(dbbpy)Pt(dmid)
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(dbbpy)Pt(dmid)
P-1 R1 0.03
dbbpy groups have empty p orbitals gt Strong
MLCT absorptions
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(dbbpy)Pt(dmid)
(dbbpy)Pt(dmid) TCNQ (dbbpy)Pt(dmid)TC
NQ
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(dbbpy)Pt(dmid)2TCNQ
3.50
3.76
3.54
Presence of TCNQ reduces Pt-Pt distances and
changes the electronic structure gt Stronger CT
absorptions
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Re2Cl4(dppm)2TCNQ
Packing Diagram
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• TCNQ Cplxs.
• Very strong CT absorptions
• Lower energy

Only d-d transitions (very weak)
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