Tuning the optoelectronic properties of cyanine and ketocyanine dyes by incorporation of 9,9-di-n-propylfluorenylindolenine
Tuning the optoelectronic properties of cyanine and ketocyanine dyes by incorporation of 9,9-di-n-propylfluorenylindolenine
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DOI：
10.1016/j.dyepig.2013.09.003
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发表时间：
2014-02-01
影响因子：
4.5
通讯作者：
Burn, P. L.
中科院分区：
文献类型：
--
作者：
Jansen-van Vuuren, R. D.;Deakin, P. C.;Burn, P. L.
报道了含9，9-二正丙基芴基单元的新型花菁和酮花菁染料的合成和性质。虽然对于每个亚乙烯基单元的添加（延长次甲基链）在花青中观察到100 nm量级的红移，但观察到芴基单元的添加使得能够微调UV-可见吸收光谱。酮花青相对于相应花青染料的紫外-可见吸收光谱的蓝移被发现与Dewar-Knott颜色规则一致。氧化（“最高占据分子轨道能量”）和还原（“最低占据分子轨道能量”）电势也与Dewar-Knott颜色规则定性一致，其中比较染料的“HOMO能量”相同，并且酮花青的LUMO能量相对于花青染料不稳定。(C)2013爱思唯尔有限公司保留所有权利。
The synthesis and properties of novel cyanine and ketocyanine dyes incorporating 9,9-di-n-propylfluorenyl units is reported. While bathochromic shifts of order 100 nm are observed in cyanines for addition of each vinylene unit (lengthening the methine chain) it was observed that addition of the fluorenyl unit enabled fine tuning of the UV-visible absorption spectrum. The hypsochromic shift in the UV-visible absorption spectrum of the ketocyanines relative to the corresponding cyanine dyes was found to be consistent with the Dewar-Knott colour rule. The oxidation ('Highest Occupied Molecular Orbital energy') and reduction ('Lowest Unoccupied Molecular Orbital energy') potentials were also qualitatively consistent with the Dewar-Knott colour rule, with the 'HOMO energies' of the comparative dyes being the same and the LUMO energies of the ketocyanines being destabilized relative to the cyanine dyes. (C) 2013 Elsevier Ltd. All rights reserved.