Isomerization behavior of spiropyran-based compounds upon X-ray irradiation

K. Asai; M. Koshimizu; Y. Fujimoto; K. Asai

doi:10.1016/j.radmeas.2017.05.016

Isomerization behavior of spiropyran-based compounds upon X-ray irradiation

K. Asai, M. Koshimizu, Y. Fujimoto, K. Asai

ENG - Applied Chemistry

Tohoku University

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We investigated the isomerization behavior of 1,3,3-trimethylindolino-6’-nitrobenzopyrylospiran (6-nitro BIPS) upon X-ray irradiation with the aim of developing tissue equivalent imaging sensor materials. We fabricated polymer films incorporated with 6-nitro BIPS. Also, we investigated the effect of the addition of the organic phosphor, b-PBD. Increase in the absorbance at 580 nm was observed at X-ray irradiation doses in the range 1–20 kGy. The increase of the absorbance as function of the dose is enhanced 1.5 times by the addition of b-PBD at 5.0 wt%. These results indicate that 6-nitro BIPS exhibits photochromism with direct excitation by X-rays, and that the photochromism behavior can be sensitized by the fluorescence from b-PBD.

Original language	English
Pages (from-to)	166-169
Number of pages	4
Journal	Radiation Measurements
Volume	106
DOIs	https://doi.org/10.1016/j.radmeas.2017.05.016
Publication status	Published - 2017 Nov

Keywords

Dosimeter
Photochromism
Radiation imaging
Radiation therapy
Tissue-equivalent
X-ray

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10.1016/j.radmeas.2017.05.016

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title = "Isomerization behavior of spiropyran-based compounds upon X-ray irradiation",

abstract = "We investigated the isomerization behavior of 1,3,3-trimethylindolino-6{\textquoteright}-nitrobenzopyrylospiran (6-nitro BIPS) upon X-ray irradiation with the aim of developing tissue equivalent imaging sensor materials. We fabricated polymer films incorporated with 6-nitro BIPS. Also, we investigated the effect of the addition of the organic phosphor, b-PBD. Increase in the absorbance at 580 nm was observed at X-ray irradiation doses in the range 1–20 kGy. The increase of the absorbance as function of the dose is enhanced 1.5 times by the addition of b-PBD at 5.0 wt%. These results indicate that 6-nitro BIPS exhibits photochromism with direct excitation by X-rays, and that the photochromism behavior can be sensitized by the fluorescence from b-PBD.",

keywords = "Dosimeter, Photochromism, Radiation imaging, Radiation therapy, Tissue-equivalent, X-ray",

author = "K. Asai and M. Koshimizu and Y. Fujimoto and K. Asai",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

month = nov,

doi = "10.1016/j.radmeas.2017.05.016",

language = "English",

volume = "106",

pages = "166--169",

journal = "Radiation Measurements",

issn = "1350-4487",

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}

TY - JOUR

T1 - Isomerization behavior of spiropyran-based compounds upon X-ray irradiation

AU - Asai, K.

AU - Koshimizu, M.

AU - Fujimoto, Y.

AU - Asai, K.

PY - 2017/11

Y1 - 2017/11

N2 - We investigated the isomerization behavior of 1,3,3-trimethylindolino-6’-nitrobenzopyrylospiran (6-nitro BIPS) upon X-ray irradiation with the aim of developing tissue equivalent imaging sensor materials. We fabricated polymer films incorporated with 6-nitro BIPS. Also, we investigated the effect of the addition of the organic phosphor, b-PBD. Increase in the absorbance at 580 nm was observed at X-ray irradiation doses in the range 1–20 kGy. The increase of the absorbance as function of the dose is enhanced 1.5 times by the addition of b-PBD at 5.0 wt%. These results indicate that 6-nitro BIPS exhibits photochromism with direct excitation by X-rays, and that the photochromism behavior can be sensitized by the fluorescence from b-PBD.

AB - We investigated the isomerization behavior of 1,3,3-trimethylindolino-6’-nitrobenzopyrylospiran (6-nitro BIPS) upon X-ray irradiation with the aim of developing tissue equivalent imaging sensor materials. We fabricated polymer films incorporated with 6-nitro BIPS. Also, we investigated the effect of the addition of the organic phosphor, b-PBD. Increase in the absorbance at 580 nm was observed at X-ray irradiation doses in the range 1–20 kGy. The increase of the absorbance as function of the dose is enhanced 1.5 times by the addition of b-PBD at 5.0 wt%. These results indicate that 6-nitro BIPS exhibits photochromism with direct excitation by X-rays, and that the photochromism behavior can be sensitized by the fluorescence from b-PBD.

KW - Dosimeter

KW - Photochromism

KW - Radiation imaging

KW - Radiation therapy

KW - Tissue-equivalent

KW - X-ray

UR - http://www.scopus.com/inward/record.url?scp=85020435870&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85020435870&partnerID=8YFLogxK

U2 - 10.1016/j.radmeas.2017.05.016

DO - 10.1016/j.radmeas.2017.05.016

M3 - Article

AN - SCOPUS:85020435870

SN - 1350-4487

VL - 106

SP - 166

EP - 169

JO - Radiation Measurements

JF - Radiation Measurements

ER -

Isomerization behavior of spiropyran-based compounds upon X-ray irradiation

Abstract

Keywords

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