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

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Presentation on theme: "Example of an application for electronic spectroscopy in coordination compounds: Solar Energy Conversion."— Presentation transcript:

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

2

3 See Grätzel et al. J. Am. Chem. Soc. 2001, 123, 1613

4 (dbbpy)Pt(dmid) Synthesis of (dbbpy)Pt(dmid)

5 P-1 R 1 = 0.03 (dbbpy)Pt(dmid) dbbpy groups have empty  * orbitals ==> Strong MLCT absorptions

6 (dbbpy)Pt(dmid) (dbbpy)Pt(dmid) + TCNQ [(dbbpy)Pt(dmid)][TCNQ]

7 [(dbbpy)Pt(dmid)] 2 [TCNQ] 3.50 3.54 3.76 Presence of TCNQ reduces Pt-Pt distances and changes the electronic structure ==> Stronger CT absorptions

8

9 Re 2 Cl 4 (dppm) 2 TCNQ Packing Diagram

10 Only d-d transitions (very weak) TCNQ Cplxs.: a)Very strong CT absorptions b)Lower energy

11

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