期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 216, 期 1, 页码 24-34出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2010.09.002
关键词
6-Substituted 2 3-naphthalimide; Large Stokes shift; Photophysics; Solvent effect; Environment-sensitive fluorophore
资金
- Key New Drug Creation and Manufacturing Program [2009ZX09103-102]
- National High Technology Research and Development Program of China (863 Program) [2006AA10A201]
- China 111 Project [B07023]
- Shanghai Leading Academic Discipline Project [B507]
In this article four new series of 6-substituted 2 3-naphthalimides (1a-d 2a-d 3a-d 4a-d and 4 e-h) have been designed and synthesized through the formation of key cyclic anhydride intermediate which was the precursor of the well known environment-sensitive fluorophore [6-N,N-dimethylammonaphthalimides (6-DMN)] and other 6-substituted 2 3-naphthalimide series (2 3 4) Based on 6-amino-2 3-naphthalimide (6-ANP) compound a new type of fluorophore was found to exhibit moderate to unusual large Stokes shift (297-303 nm) 6-ANP derivatives display relatively low fluorescence quantum yields in high polar protic solvents such as water (Phi(F) similar to 0 004 571-576 nm) and a significant unusual red shift due to (1) hydrogen bonding interaction of the excited state of the molecule with the solvents which presumably enhance the intersystem crossing process in the system to quench fluorescence (2) this large Stokes shift was assumed to be the consequence of a substantial change of the geometric structure from the ground state (S-0) to the first excited state (S-1)) Compared with the other compounds studied the fluorescence of the nitro- and halo-derivatives was rather weak probably due to the efficient intersystem crossing leading to a non-reactive triplet state (C) 2010 Elsevier B V All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据