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Photo-responsive Retention Behavior of Azobenzene-modified Cyclodextrin Stationary Phase in Micro-HPLC

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Abstract

An azobenzene-modified γ-cyclodextrin stationary phase (Azγ-CDSP) was prepared and its photo- and temperature-responses for the retention of perylene and pentacene were investigated using a mixture of methanol and water as the mobile phase in micro-HPLC. The retention of perylene slightly increased, whereas that of pentacene significantly decreased by UV light irradiation to Azγ-CDSP. These retentions recovered upon irradiation with visible light. Both retentions decreased upon an increase in the column temperature. It was presumed that the trans-azobenzene moiety acts as a preventive cap for perylene and a spacing for pentacene in filling the CD cavity. An azobenzene-modified stationary phase changed its retention behavior with the column temperature and the light irradiation. An improvement in the micro-HPLC system and the optimization of the molecular structure of the photo-responsive stationary phase would provide selective retention control by the irradiation of light in micro-separation systems.

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Nakagama, T., Hirasawa, K., Uchiyama, K. et al. Photo-responsive Retention Behavior of Azobenzene-modified Cyclodextrin Stationary Phase in Micro-HPLC. ANAL. SCI. 17, 119–124 (2001). https://doi.org/10.2116/analsci.17.119

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  • DOI: https://doi.org/10.2116/analsci.17.119

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