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Photoinduced topographical surface changes and photoresponse of the crystals of 7-methoxycoumarin.

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Title: Photoinduced topographical surface changes and photoresponse of the crystals of 7-methoxycoumarin.
Authors: Yano, Kanae1 (AUTHOR), Nishimura, Ryo1 (AUTHOR), Hattori, Yohei1 (AUTHOR), Morimoto, Masakazu2 (AUTHOR), Sugiyama, Haruki3 (AUTHOR), Kamitanaka, Takashi4 (AUTHOR), Yokojima, Satoshi5 (AUTHOR), Nakamura, Shinichio6 (AUTHOR), Uchida, Kingo1 (AUTHOR) uchida@rins.ryukoku.ac.jp
Source: CrystEngComm. 9/14/2021, Vol. 23 Issue 34, p5780-5787. 8p.
Subjects: Diarylethene, Crystals, Single crystals, Crystal surfaces, Amorphization, Dimerization, Irradiation
Abstract: 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. [ABSTRACT FROM AUTHOR]
Copyright of CrystEngComm is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 152225982
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Photoinduced topographical surface changes and photoresponse of the crystals of 7-methoxycoumarin.
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  Data: <searchLink fieldCode="AR" term="%22Yano%2C+Kanae%22">Yano, Kanae</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nishimura%2C+Ryo%22">Nishimura, Ryo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hattori%2C+Yohei%22">Hattori, Yohei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Morimoto%2C+Masakazu%22">Morimoto, Masakazu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sugiyama%2C+Haruki%22">Sugiyama, Haruki</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kamitanaka%2C+Takashi%22">Kamitanaka, Takashi</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yokojima%2C+Satoshi%22">Yokojima, Satoshi</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nakamura%2C+Shinichio%22">Nakamura, Shinichio</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Uchida%2C+Kingo%22">Uchida, Kingo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> uchida@rins.ryukoku.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22CrystEngComm%22">CrystEngComm</searchLink>. 9/14/2021, Vol. 23 Issue 34, p5780-5787. 8p.
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  Data: 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of CrystEngComm is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1039/d1ce00444a
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 5780
    Subjects:
      – SubjectFull: Diarylethene
        Type: general
      – SubjectFull: Crystals
        Type: general
      – SubjectFull: Single crystals
        Type: general
      – SubjectFull: Crystal surfaces
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      – SubjectFull: Amorphization
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      – SubjectFull: Dimerization
        Type: general
      – SubjectFull: Irradiation
        Type: general
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      – TitleFull: Photoinduced topographical surface changes and photoresponse of the crystals of 7-methoxycoumarin.
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            – D: 14
              M: 09
              Text: 9/14/2021
              Type: published
              Y: 2021
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