期刊
TETRAHEDRON
卷 69, 期 1, 页码 29-37出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2012.10.070
关键词
Two-photon absorption; Self-assembly; Supramolecules; Donor-acceptor; Hexaazatriphenylenes
资金
- Tokuyama Science Foundation
- Yoshida Foundation for the Promotion of Learning and Education
- Ministry of Education, Science, Culture, Sports, and Technology of Japan [22550132]
- Grants-in-Aid for Scientific Research [22550132] Funding Source: KAKEN
This paper reports the self-assembling and two-photon absorption natures of donor acceptor molecules, tri(phenanthro)hexaazatriphenylene (TPHAT-C) and tri(phenanthrolino)hexaazatriphenylene (TPHAT-N), bearing six electron-donating moieties. In the H-1 NMR spectra, a line-broadening effect, arising from self-assembled aggregation was observed. Several hundred nanometer scale aggregates were detected in dynamic light scattering. The one-dimensional aggregation of the TPHAT molecules was indicated by the concentration dependence in UV/vis one-photon absorption and one-photon excited fluorescence spectroscopies. An enhancement of the two-photon absorption cross-section was observed in the self-assembled TPHAT system. The order of the two-photon absorption nature is in agreement with the order of the aggregative nature. (C) 2012 Elsevier Ltd. All rights reserved.
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