Study of spectral behaviour and optical properties of cis/trans-bis (N-methylpyridinium-4-yl)diphenyl porphyrin adsorbed on layered silicates
Study of spectral behaviour and optical properties of cis/trans-bis (N-methylpyridinium-4-yl)diphenyl porphyrin adsorbed on layered silicates
复制标题
DOI：
10.1016/j.jcis.2011.04.010
复制
发表时间：
2011-08-01
影响因子：
9.9
通讯作者：
Bujdak, J.
中科院分区：
文献类型：
--
作者：
Ceklovsky, A.;Takagi, S.;Bujdak, J.
研究了顺式和反式双（N-甲基吡啶-4-基）二苯基卟啉在粘土矿物模板上吸附的光谱性质。使用一系列电荷减少的Nanocor蒙脱石作为主体模板。讨论了层电荷对吸收光谱和荧光光谱的影响。卟啉的吸附导致其光谱发生显着变化，但保留了染料的光活性。这种变化可以归因于两种现象：卟啉分子的结构变化（扁平化）和分子聚集。后者受染料分子结构的影响较大，主要影响反式异构体的性质。蒙脱土模板的层电荷对组装体的形成有显著影响。这项研究提出了一个例子，如何能够影响的光谱特性，也可能是吸附的光活性分子的功能，通过一个策略的光活性组分与特定的无机模板的适当组合。(C)2011 Elsevier Inc. All rights reserved.
The spectral properties of two dicationic porphyrins, cis- and trans-bis(N-methylpyridinium-4-yl)diphenyl porphyrins, upon adsorption on clay mineral templates were investigated. A series of reduced charge Nanocor montmorillonites was used as host templates. The main impact was given on the influence of the layer charge on the absorption and fluorescence spectra. Adsorption of the porphyrins led to significant changes in their spectra but preserved the photoactivity of the dyes. The changes can be attributed to two phenomena: structural changes (flattening) of the porphyrin molecules and molecular aggregation. Latter one was more influenced by the molecular structure of the dyes and influenced the properties of mainly trans-isomer. The formation of the assemblies was significantly influenced by the layer charge of montmorillonite template. This study presents the example how one is able to influence the spectral properties and possibly also the functionality of adsorbed photoactive molecules via a strategy of appropriate combination of a photoactive component with specific inorganic templates. (C) 2011 Elsevier Inc. All rights reserved.