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Issue 17, 2016
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A perylene bisimide derivative with pyrene and cholesterol as modifying structures: synthesis and fluorescence behavior

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Abstract

A perylene bisimide (PBI) derivative (C-PBI-Py) of pyrene (Py) and cholesteryl residue (C) possessing intra-molecular energy transfer properties and three reference compounds (C-Py, C-PBI, PBI-Py) were designed and synthesized, where C was introduced in order to enhance the solubility of the relevant compounds in organic solvents. UV-vis absorption, steady-state fluorescence, cyclic voltammetric and theoretical calculation studies revealed that: (1) the PBI unit and Py moiety of C-PBI-Py could act as two individual chromophores, (2) the excited state energy of Py could transfer to PBI within a single molecule of the compound, and (3) the PBI moiety of the compound tends to form aggregates and shows PBI excimer emission. Time-resolved and temperature-dependent emission spectroscopy studies revealed the presence of both H-type excimer and J-type excimer, and formation of them via either the Birks' scheme or the pre-formed scheme due to strong π–π stacking that was elucidated by concentration-dependent 1H NMR spectroscopy measurement. In addition, the studies also indicated that the energy transfer occurs via an electron exchange mechanism (Dexter scheme). Results of this study will be useful in the development of new solvatochromic and other environment-sensitive fluorophores based on alteration of intra-molecular energy transfer efficiency.

Graphical abstract: A perylene bisimide derivative with pyrene and cholesterol as modifying structures: synthesis and fluorescence behavior

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Supplementary files

Article information


Submitted
02 Mar 2016
Accepted
31 Mar 2016
First published
31 Mar 2016

Phys. Chem. Chem. Phys., 2016,18, 12221-12230
Article type
Paper

A perylene bisimide derivative with pyrene and cholesterol as modifying structures: synthesis and fluorescence behavior

G. Wang, W. Wang, R. Miao, C. Shang, M. He, H. Peng, G. He and Y. Fang, Phys. Chem. Chem. Phys., 2016, 18, 12221
DOI: 10.1039/C6CP01447J

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