Vibrational Raman and IR data on brown hair subjected to bleaching

Michele Di Foggia; Carla Boga; Gabriele Micheletti; Benedetta Nocentini; Paola Taddei

doi:10.1016/j.dib.2021.107439

Vibrational Raman and IR data on brown hair subjected to bleaching

Data Brief. 2021 Sep 30:38:107439. doi: 10.1016/j.dib.2021.107439. eCollection 2021 Oct.

Authors

Michele Di Foggia¹, Carla Boga², Gabriele Micheletti², Benedetta Nocentini², Paola Taddei¹

Affiliations

¹ Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum - Università di Bologna, Via Belmeloro 8/2, Bologna 40126, Italy.
² Department of Industrial Chemistry 'Toso Montanari', Alma Mater Studiorum - Università di Bologna, Viale Del Risorgimento 4, Bologna 40136, Italy.

Abstract

Brown human hair was bleached three times (45 min × 3) and four times (45 min × 3 + 15 min) with commercial formulations containing persulfate salts and hydrogen peroxide. The hair samples were characterized by Raman and IR spectroscopy in the Attenuated Total Reflectance (ATR) mode to gain more insights into the possible secondary structure and C_α-C_β-S-S-C_β-C_α conformational changes induced by bleaching. The latter were evaluated through band-fitting procedures; the relative content of the disulfide bridges and oxidized sulfur species (cysteic acid, Bunte salt, cystine oxides) was assessed. The observed conformational changes could be significant in developing restoring agents to be used after hair decoloration. The use of two different spectroscopic techniques allowed to discriminate the information coming from the cortical region of hair (Raman) and the cuticle (ATR/IR). This article refers to "Structural investigation on damaged hair keratin treated with α,β-unsaturated Michael acceptors used as repairing agents" (Di Foggia et al., Int. J. Biol. Macromol. 167 (2021) 620-632 https://doi.org/10.1016/j.ijbiomac.2020.11.194).

Keywords: Bleaching; Cysteic acid; Disulfide bridges; Hair keratin; IR spectroscopy; Raman spectroscopy; Secondary structure.