Inclusion complexes of β-cyclodextrin-dinitrocompounds as UV absorber for ballpoint pen ink

•The absorption intensities are increased by preparation of inclusion complex of dinitro compounds with β-cyclodextrin.•To improve the UV protection properties of ball point pen ink against photo degradation.•The sun protection factor (SPF) was discussed.•The inclusion complex has used as a novel probe.

2,4-Dinitrophenol (2,4-DNP), 2,4-dinitroaniline (2,4-DNA), 2,6-dinitroaniline (2,6-DNA) and 2,6-dinitrobenzoic acid (2,6-DNB) has appeared for the UV absorption bands in different wavelength region below 400 nm, a combination of these dinitro aromatic compounds gave the broad absorption spectra within the UV region. The absorption intensities have been increased by preparation of the inclusion complex of dinitro compounds with β-cyclodextrin (β-CD). Prepared inclusion complexes are used to improve the UV protection properties of the ball point pen ink against photo degradation. The formation of solid inclusion complexes was characterized by FT-IR, and 1H NMR spectroscopy. The UV protecting properties of these inclusion complexes were calculated their sun protection factor (SPF) is also discussed. The stability of the ballpoint pen ink has been confirmed by UV–Visible spectroscopic method.

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