Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 149, Issue -, Pages 426-433Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.04.093
Keywords
Phthalocyanine; Triazine; Optical limiting properties; Intramolecular aggregation; Photophysical properties
Categories
Funding
- National Basic Research Program of China [2011CBA00905, 2013CB834703, 2013CB834505]
- National Natural Science Foundation of China [21233011, 91123033, 21373240, 21273252, 21205122]
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A series of triazine-linked mono-, bis- and tris-phthalocyanines are synthesized, intramolecular aggregation is found in bis- and tris-phthalocyanines via pi-pi stacking interaction. Theoretical and experimental studies reveal the formation of the intramolecular aggregation. The spectrographic, photophysical and nonlinear optical properties of these compounds are adjusted for the formation of the intramolecular aggregation. The bis-phthalocyanine dimer presents smaller fluorescence quantum yield, lower triplet formation yield and the triplet-minus-ground state extinction coefficient, which causes poorer optical limiting performance. It is interesting that the tris-phthalocyanine is composed of a mono-phthalocyanine part and a bis-phthalocyanine part, the optical limiting property of the tris-phthalocyanine is similar to that of mono-phthalocyanine. (C) 2015 Elsevier B.V. All rights reserved.
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