Core-Modified Naphthalenediimides Generate Persistent Radical Anion and Cation: New Panchromatic NIR Probes
作者:M. R. Ajayakumar、Deepak Asthana、Pritam Mukhopadhyay
DOI:10.1021/ol302140x
日期:2012.9.21
The generation of the firstpersistent radical cation of naphthalenediimide with Cu2+/Fe3+ under ambient conditions is reported. An alternate anionic trigger generates a persistent radical anion within the same motif. Steric protection and H-bonding enhances the half-life of radical cation by 290-fold. The radical anion and cation have orthogonal spin density, panchromatic and NIR optical bands, which
报道了在环境条件下用Cu 2+ / Fe 3+生成萘二甲酰亚胺的第一个持久性自由基阳离子。另一种阴离子引发剂可在同一基序内生成持久性自由基阴离子。立体保护和氢键将自由基阳离子的半衰期延长了290倍。自由基阴离子和阳离子具有正交的自旋密度,全色和NIR光学带,可以用作有吸引力的多通道探针。
Synthesis and Optical and Redox Properties of Core-Substituted Naphthalene Diimide Dyes
and diamino-substituted naphthalene diimides. An alternative route for the synthesis of diamino-substituted naphthalene diimides is also reported. Optical and electrochemical properties of the newly synthesized amino-functionalized naphthalene diimides were studied in detail. The absorption maxima (530−620 nm) of these dyes are appreciably bathochromically shifted compared to those of the corresponding