Self-standing films of tetraindolyl derivative and saponite clay mineral with reversible colour switching properties
Self-standing films of tetraindolyl derivative and saponite clay mineral with reversible colour switching properties
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DOI：
10.1016/j.jpcs.2020.109487
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发表时间：
2020-09
影响因子：
4
通讯作者：
S. Sarkar;Barnali Deb;Bapi Dey;Sudip Suklabaidya;S. Chakraborty;D. Bhattacharjee;S. Majumdar;Yasutaka Suzuki;J. Kawamata;S. Hussain
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文献类型：
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作者：
S. Sarkar;Barnali Deb;Bapi Dey;Sudip Suklabaidya;S. Chakraborty;D. Bhattacharjee;S. Majumdar;Yasutaka Suzuki;J. Kawamata;S. Hussain
功能纳米二维粘土矿物颗粒具有较高的阳离子交换能力、层状结构和插层性能，被认为是控制有机分子的理想载体材料。粘土层的层间高度可以通过同时进行润湿和干燥步骤来控制。本文研究了1，4-二-二吲哚甲烷-苯在合成皂石(SSA)层间生成的有机染料的变色行为。最初透明的自立式有机粘土杂化薄膜在加热时变红，这表明有机染料的生成表明有机染料的就地生成，并增加了嵌入有机分子的平面性。在溶胀时，由于C-C键旋转产生的染料平面性的部分扰动，相同的杂化膜变成黄色。同时加热和膨胀导致红色和黄色之间的可逆颜色转变(肉眼清晰可见)至少30个周期。这种系统在色度传感器和光学(光开关、光存储等)领域具有潜在的应用前景。
Functional nanosized two-dimensional clay mineral particles are considered as ideal host materials to manipulate the properties of incorporated organic molecules due to their high cation exchange capacity, layer structure and intercalation properties. The interlayer height of clay layers can be manipulated by simultaneous wetting and drying steps. Here, we have studied the chromatic behaviour of an organic dye generatedin-situfrom 1,4-di-bis-indolylmethane-benzene in the interlayer space of synthetic saponite (SSA). Initially transparent, self-standing organo-clay hybrid films become red upon heating due to aerobic oxidation suggestingin-situgeneration of organic dye and increases the planarity of the intercalated organic molecules. Upon swelling the same hybrid film becomes yellow, due to the partial disturbance in the planarity of generated dye via C-C bond rotation. Simultaneous heating and swelling resulted in a reversible colour transition (clearly visible through the naked eye) between red and yellow for at least 30 cycles. This kind of system may have potential applications as a colorimetric sensor and in the field of optics (optical switching and optical memory etc).