Photoinduced topographical surface changes and photoresponse of the crystals of 7-methoxycoumarin
Photoinduced topographical surface changes and photoresponse of the crystals of 7-methoxycoumarin
复制标题
7-甲氧基香豆素晶体的光诱导形貌表面变化和光响应
DOI：
10.1039/d1ce00444a
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发表时间：
2021
期刊：
影响因子：
3.1
通讯作者：
K. Uchida
中科院分区：
文献类型：
--
作者：
K. Yano;R. Nishimura;Y. Hattori;M. Morimoto;H. Sugiyama;T. Kamitanaka;S. Yokojima;S. Nakamura;K. Uchida
在深紫外光(254 Nm)照射下，观察到7-甲氧基香豆素单晶表面由于二聚反应而产生的光致形貌变化。365 nm辐照后，晶体表面形成阶梯状或谷状结构，这取决于表面指数。作为紫外光波长的函数，二聚化厚度的深度会发生变化。在强紫外光照射下，观察到了晶体的光致发光现象。7-甲氧基香豆素颗粒晶体升华后形成细棒状晶体、中空锥状晶体和结晶胶囊等多种形状的晶体。在细棒状晶体中观察到了由于二聚化反应引起的光致弯曲。中空晶体在紫外光照射下表现出光致发光现象。在7-甲氧基香豆素晶体中也观察到了以前报道的几种二芳基乙烯晶体的弯曲和光致发光现象。然而，与二芳基乙烯晶体不同的是，我们发现香豆素晶体表面的光致非晶化以及365 nm长时间照射下的反向弯曲。
Photoinduced topographical changes due to the dimerization reaction were observed on the surface of a single crystal of 7-methoxycoumarin, upon deep UV (254 nm) light irradiation. Upon 365 nm irradiation, a step or valley formation was observed on the crystalline surface depending on the surface index. As a function of UV light wavelength, the depth of dimerization thickness changes. After intensive UV irradiation, photosalient phenomena of the crystal were observed. As a result of sublimation from granular crystals of 7-methoxycoumarin, several kinds of shaped crystals, including thin rod-shaped crystals, hollow cone-shaped crystals, and crystalline capsules were formed. Photoinduced bending due to the dimerization reaction was observed in the thin rod-shaped crystals. The hollow crystals showed photosalient phenomena upon UV irradiation. The bending and photosalient phenomena, previously reported for several kinds of diarylethene crystals, were also observed for 7-methoxycoumarin crystals. Unlike the case of diarylethene crystals, however, we found photoinduced amorphization on a coumarin crystal surface as well as reverse bending with prolonged irradiation of 365 nm light.
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DOI：
10.1039/c39820000178
发表时间：
1982
期刊：
Journal of The Chemical Society, Chemical Communications
影响因子：
--
作者：
N. Ramasubbu;T. Row;K. Venkatesan;V. Ramamurthy;C. Rao
通讯作者：
C. Rao
单晶中二芳基乙烯有色异构体的吸收光谱
影响因子：
1.6
作者：
S. Kobatake;M. Morimoto;Y. Asano;A. Murakami;Shinichiro Nakamura;M. Irie
通讯作者：
M. Irie
影响因子：
3.1
作者：
N. Fujinaga;Naoki Nishikawa;Ryo Nishimura;Kengo Hyodo;S. Yamazoe;Y. Kojima;Kazuki Yamamoto;T. Tsujioka;M. Morimoto;S. Yokojima;Shinichiro Nakamura;K. Uchida
通讯作者：
K. Uchida
影响因子：
4.3
作者：
Nakagawa, Yuma;Morimoto, Masakazu;Uchida, Kingo
通讯作者：
Uchida, Kingo
二芳基乙烯薄膜表面的光致形貌变化
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Kingo Uchida;Norikazu Izumi;Yuko Kojima;Tsuyoshi Tsujioka;Shinichiro Nakamura;and Masahiro Irie
通讯作者：
and Masahiro Irie