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Spectroscopic and Structural Insights on Molecular Assembly Consisting High Potential Zinc Phthalocyanine Photosensitizer Attached to PyC60 Through Non-Covalent Interaction

Spectroscopic and Structural Insights on Molecular Assembly Consisting High Potential Zinc Phthalocyanine Photosensitizer Attached to PyC60 Through Non-Covalent Interaction

Anamika Ray, Kotni Santhosh, Sumanta Bhattacharya

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jan 25;135:386-97.

PMID: 25104284

Abstract:

Efforts to improve the ease of self-assembly formation through non-covalent interaction has led to the development of zinc phthalocyanine (zinc-2,9,16,23-tetra-tert-butyl phthalocyanine, i.e., ZnPc) as a high potential photosensitizer molecule towards C60 pyrrolidine tris-acid ethyl ester (PyC60) in toluene and 1,2-dichlorobenzene (DCB). Steady state fluorescence experiment elicits efficient quenching of the fluorescence intensity of both H2- and ZnPc in presence of PyC60. The average value of binding constant for PyC60/H2-Pc and PyC60/ZnPc systems in toluene (DCB) are determined to be 9910 (13,460) and 12,710 (24,060) dm(3) mol(-1), respectively. Lifetime experiment yields ∼3 times larger magnitude of charge separated rate constant for the PyC60/ZnPc system compared to PyC60/H2-Pc in toluene. Photoinduced energy transfer between PyC60 and H2- (/ZnPc) has been evidenced with nanosecond laser photolysis method; transient absorption studies establish that energy transfer from (T)PyC60(∗) to H2- and ZnPc occurs predominantly, as confirmed by the consecutive appearance of the triplet states of PyC60.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76134	C60 Pyrrolidine tris-acid ethyl ester			Price

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