Effect of pressure on photochromic furylfulgide
Effect of pressure on photochromic furylfulgide
复制标题
压力对光致变色呋喃酰二脲的影响
DOI：
10.1140/epjb/e2013-30596-3
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T. Sekiya
中科院分区：
文献类型：
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作者：
Shuji Tomotsune;T. Sekiya
使用溶液中的单分散分子和单晶中的分子，通过在金刚石砧池提供的压力下测量室温下的光学吸收来研究压力对光致变色呋喃酰二甘酸的影响。溶液中单分散的开环（E型）和闭环（C型）异构体在高压下稳定；然而，在没有紫外线照射的情况下，在高于 3.0 GPa 的由 E 型分子组成的单晶中观察到压力诱导的 E → C 异构化。在高达 5.0 GPa 的高压下，单分散分子和单晶中都可以观察到呋喃酰二脲的光致变色现象。在单晶中，当 C 型分子的比例变得相对较大时，从 E 型到 C 型的光诱导转化会加速到临界值以上。该临界值取决于施加的压力。加速是由于周围分子的影响，即，被足够数量的光转换的C型分子包围的E型分子的不稳定导致E型分子的转换而不吸收光子。
The effect of pressure on photochromic furylfulgide is investigated using monodispersed molecules in solution and molecules in a single crystal by measuring the optical absorption at room temperature under pressure provided using a diamond anvil cell. Monodispersed open-ring (E-form) and closed-ring (C-form) isomers in solution are stable under high pressure; however, pressure-induced E → C isomerisation is observed in a single crystal composed of E-form molecules above 3.0 GPa without UV irradiation. Photochromism of furylfulgide can be observed under high pressures up to 5.0 GPa in both monodispersed molecules and single crystals. In a single crystal, photoinduced conversion from the E-form to the C-form accelerates above a critical value when the fraction of C-form molecules becomes relatively large; this critical value depends on the applied pressure. The acceleration is due to the effect of the surrounding molecules, i.e., destabilisation of E-form molecules surrounded by a sufficient number of photoconverted C-form molecules results in conversion of the E-form molecule without the absorption of a photon.