Wang Zeping, Xie Dingli, Zhang Feng, Yu Jiabing, Chen Xianping, Wong Ching Ping
Key Laboratory of Optoelectronic Technology & Systems, Education Ministry of China and College of Optoelectronic Engineering, Chongqing University, 400044 Chongqing, People's Republic of China.
Chongqing Pingchuang Institute of Semiconductors, Chongqing 400044, People's Republic of China.
Sci Adv. 2020 Nov 25;6(48). doi: 10.1126/sciadv.abc2181. Print 2020 Nov.
Controlling the duration that information lasts on paper so that it disappears as desired is crucial for information security. However, this area is rarely studied. Here, we report [TEMA]SbCl (, TEMA = methyltriethylammonium), [TEA]SbCl (, TEA = tetraethylammonium), [TEBA]SbCl (, TEBA = benzyltriethylammonium), and [PhP]SbCl (, PhP = tetraphenylphosphonium) with structure-dependent reversible photoluminescent switching induced by the absorption and thermal release of small guest molecules including HO, methanol, and ethylene glycol. Comparing the structural disorder levels, bond lengths, and luminescent Stokes shifts of the compounds aided in understanding their selective absorption behavior. Our results indicated that the information duration on the rewritable paper coated with the title compounds is easily tuned by changing the cation of the compounds, the type of guest molecules, and laser heating power. Our study opens previously unidentified avenues for information security and extends the potential applications of rewritable paper.
控制信息在纸张上持续的时间，使其按预期消失，这对信息安全至关重要。然而，这一领域很少有人研究。在此，我们报道了[TEMA]SbCl（TEMA = 甲基三乙铵）、[TEA]SbCl（TEA = 四乙铵）、[TEBA]SbCl（TEBA = 苄基三乙铵）和[PhP]SbCl（PhP = 四苯基鏻），它们具有由包括H₂O、甲醇和乙二醇在内的小分子客体的吸收和热释放诱导的结构依赖性可逆光致发光切换。比较这些化合物的结构无序水平、键长和发光斯托克斯位移有助于理解它们的选择性吸收行为。我们的结果表明，通过改变化合物的阳离子、客体分子的类型和激光加热功率，可以轻松调节涂覆有标题化合物的可重写纸上的信息持续时间。我们的研究为信息安全开辟了以前未被发现的途径，并扩展了可重写纸的潜在应用。
