Chemo- and biosensing applications of spiropyran and its derivatives A review

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Spiropyrans are a class of photochromic compounds that feature two main isoforms, a closed spiropyran (SP) and an open merocyanine (MC), which are inter-switchable with UV and visible light. The double bond containing MC isomer has several resonance forms with different optical spectra. Consequently, the overall spectral characteristic of the spiropyran solution depends on the relative contribution of each resonance form. In addition, the reversible changes of the absorbance or fluorescence spectra of MC are dictated by the environment. By utilizing these properties, spiropyran and its derivatives have been employed to monitor a variety of molecules and ions that can alter the resonance forms of MC. In this review, we provide a comprehensive discussion on a range of species that can be detected by spiropyran including metal ions, anions, acids, solvents, and even biomolecules, the major analytical detection mechanisms involved, and the novelty of such techniques. This study establishes spiropyran as a versatile platform for the detection of both organic and inorganic target molecules.
Publisher
ELSEVIER
Issue Date
2020-05
Language
English
Article Type
Review
Citation

ANALYTICA CHIMICA ACTA, v.1110, pp.199 - 223

ISSN
0003-2670
DOI
10.1016/j.aca.2020.01.057
URI
http://hdl.handle.net/10203/274040
Appears in Collection
CBE-Journal Papers(저널논문)
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