Penyediaan dan pengaktifan bagi sistem spiropiran-merosianin

Translated title of the contribution: Preparation and activation of spiropyran-merocyanine system

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A benzospiropyran derivative has been prepared by the condensation of the precursor, methylene indoline derivative with 2,3-dihydroxylbenzaldehye in 1:1 mole ratio. The product, spiro [2H-1-benzopyran-2, 2'-(8'-hydroxy-1', 3', 3'-trimethylindoline)] was able to undergo molecular rearrangement when exposed to UV light, producing an open form merocyanine. Both opened (MC) and closed form (SP) of benzospiropyran were characterized and distinguished by NMR spectroscopy, ATR Infrared and UV-vis absorption. In addition, complexation of metal ions with benzospiropyran in ethanol solution gives rise to colour changes that are visible to the naked eye. Hence, hypsochromic shift in the absorption bands were observed due to the metal ion binding (MC-M).

Original languageUndefined/Unknown
Pages (from-to)422-429
Number of pages8
JournalMalaysian Journal of Analytical Sciences
Volume17
Issue number3
Publication statusPublished - 2013

Fingerprint

Chemical activation
Metal ions
Derivatives
Benzopyrans
Complexation
Ultraviolet radiation
Nuclear magnetic resonance spectroscopy
Absorption spectra
Condensation
Ethanol
Color
Infrared radiation
merocyanine
1-(beta-carboxyethyl)-3,3-dimethyl-6'-nitrospiro(indoline- 2,2'-2H-benzopyran)
spiropyran
indoline

Keywords

  • Benzospiropyran
  • Merocyanine and hypsochromic shift
  • Photochromic

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Penyediaan dan pengaktifan bagi sistem spiropiran-merosianin. / Nordin, Rumaisa; Mat Lazim, Mohamad Azwani Shah; Rohadi, Atisya; Hasbullah, Siti Aishah.

In: Malaysian Journal of Analytical Sciences, Vol. 17, No. 3, 2013, p. 422-429.

Research output: Contribution to journalArticle

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AU - Mat Lazim, Mohamad Azwani Shah

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AU - Hasbullah, Siti Aishah

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N2 - A benzospiropyran derivative has been prepared by the condensation of the precursor, methylene indoline derivative with 2,3-dihydroxylbenzaldehye in 1:1 mole ratio. The product, spiro [2H-1-benzopyran-2, 2'-(8'-hydroxy-1', 3', 3'-trimethylindoline)] was able to undergo molecular rearrangement when exposed to UV light, producing an open form merocyanine. Both opened (MC) and closed form (SP) of benzospiropyran were characterized and distinguished by NMR spectroscopy, ATR Infrared and UV-vis absorption. In addition, complexation of metal ions with benzospiropyran in ethanol solution gives rise to colour changes that are visible to the naked eye. Hence, hypsochromic shift in the absorption bands were observed due to the metal ion binding (MC-M).

AB - A benzospiropyran derivative has been prepared by the condensation of the precursor, methylene indoline derivative with 2,3-dihydroxylbenzaldehye in 1:1 mole ratio. The product, spiro [2H-1-benzopyran-2, 2'-(8'-hydroxy-1', 3', 3'-trimethylindoline)] was able to undergo molecular rearrangement when exposed to UV light, producing an open form merocyanine. Both opened (MC) and closed form (SP) of benzospiropyran were characterized and distinguished by NMR spectroscopy, ATR Infrared and UV-vis absorption. In addition, complexation of metal ions with benzospiropyran in ethanol solution gives rise to colour changes that are visible to the naked eye. Hence, hypsochromic shift in the absorption bands were observed due to the metal ion binding (MC-M).

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KW - Merocyanine and hypsochromic shift

KW - Photochromic

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