A self-assembled light-harvesting array of seven porphyrins in a wheel and spoke architecture

Organic Letters

Volumn 2, Issue 17, 2000, Pages 2563-2566

  Ambroise, Arounaguiry ^a   Li, Junzhong ^a   Yu, Lianhe ^a   Lindsey, Jonathan S ^a  

^a NORTH CAROLINA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

PORPHYRIN; ZINC;

ARTICLE; CHEMISTRY; CONFORMATION; PHYSICAL CHEMISTRY; SPECTROFLUOROMETRY;

CHEMISTRY, PHYSICAL; MOLECULAR CONFORMATION; PORPHYRINS; SPECTROMETRY, FLUORESCENCE; ZINC;

EID: 0034710495     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol006036d     Document Type: Article

References (24)

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16. Li, J.; Ambroise, A.; Yang, S. I.; Diers, J. R.; Seth, J.; Wack, C. R.; Bocian, D. F.; Holten, D.; Lindsey, J. S. J. Am. Chem. Soc. 1999, 121, 8927-8940.
17. -1, implying >90% binding under the conditions of the energy-transfer experiments (see Supporting Information).
18. f = 0.033 in toluene and 0.038 in pyridine.
19. 6U-2) causes a net 15% decline in absorption at 550 nm, stemming from a 6% increase due to 2 and a 21% decrease due to the red shift of the two pyridyl-coordinated zinc porphyrins.
20. Addition of 2 or 10 equiv of 2 resulted in negligible further decline in zinc porphyrin emission, reflecting the tight binding inferred from absorption measurements.
21. -6 M, which is 10 times the concentration at which the self-assembly process occurs with the cyclic hexameric arrays and a suitable guest (1 or 2), resulted in no detectable binding or energy transfer between the two porphyrins.
22. trans is based on the upper limit set by the zinc porphyrin quenching experiment (43%) and consideration of the errors irherent in quantitative analyses of static absorption and fluorescence spectra.
23. Yang, S. I.; Seth, J.; Balasubramanian, T.; Kim, D., Lindsey, J. S.; Holten, D.; Bocian, D. F. J. Am. Chem. Soc. 1999, 121, 4008-4018.
24. trans = 43.9% (performed on model porphyrin monomers using PhotochemCAD: Du, H.; Fuh, R.-C. A.; Li, J.; Corkan, L. A.; Lindsey, J. S. Photochem. Photobiol. 1998, 68, 141-142).