Nicotine, being a major constituent of secondhand smoke (SHS) or cigarette smoke, is quite harmful for human health, because of its carcinogenic potential. Hence, its detection in air has become very significant. Herein, for the first time, a metal organic nanotube (MONT) is being used for the detection of nicotine from cigarette smoke at room temperature. MONT is a unique class of metal-organic framework (MOF) where independent one-dimensional tubular structures are formed. MONT, [Zn₃(btc)₂(μ3-OH)(DMF)]·H₂O (1), reported here, possesses distinctive structural features, i.e., three differently shaped porous channels (circular, star, and oval), formed by periodic linkage of btc with Zn, giving rise to the formation of a highly porous framework structure. When exposed to cigarette smoke in the presence of sunlight, this MONT display a gasochromic effect, i.e., a significant color change from light yellow to dark pink within just 20 s. A high sensitivity with low detection limit of ∼ 23.3 μM was witnessed. The significance of this work lies in the visible-light-assisted, fast, easy, naked-eye, specific sensing of nicotine from cigarette smoke, which is the first of its kind.

中文翻译：

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金属有机纳米管对香烟烟雾中尼古丁的可见光辅助气致变色传感

尼古丁是二手烟（SHS）或香烟烟雾的主要成分，由于其潜在的致癌性，因此对人体健康非常有害。因此，其在空气中的检测变得非常重要。本文中，首次将金属有机纳米管（MONT）用于在室温下从香烟烟雾中检测尼古丁。MONT是一类独特的金属有机框架（MOF），在其中形成了独立的一维管状结构。此处报道的[Zn ₃（btc）₂（μ3-OH）（DMF）] · H ₂ O（1）具有独特的结构特征，即三个不同形状的多孔通道（圆形，星形和椭圆形），由...的周期性链接形成含锌的btc，导致形成高度多孔的骨架结构。在有阳光的情况下暴露于香烟烟雾中时，此MONT会显示出气致变色效应，即在短短20 s内颜色就会从浅黄色变为深粉红色。观察到高灵敏度，检测限低至约23.3μM。这项工作的意义在于可见光辅助，快速，简便，肉眼对香烟烟雾中尼古丁的特异性感测，这是此类研究的首次。