Aniline-based oligomers with pervasive applications exhibit a monodisperse molecular
weight, with great environmental stability and unique reversible optoelectrochemical …

The prevalent π–π interactions in 2D covalent organic frameworks (COFs) impart a certain
flexibility to the structures, making the stacking of COF layers susceptible to external stimuli …

The compatibility of crystallinity, stability, and functionality in covalent organic frameworks
(COFs) is challenging but significant in reticular chemistry and materials science. Herein, it is …

Most of the permanent hair dye products contain p-phenylenediamine (PPD), a well-known
skin sensitizer. PPD may cause cutaneous reactions and leads to allergic contact dermatitis …

Most permanent hair dyes include the hair color precursor para-phenylenediamine (PPD). It
is also, regrettably, a well-recognized powerful contact allergen that, when exposed to the …

This paper reviews developments in industrial colorants as active ingredients of commercial
products that rely on oxidative chemistry for the coloration of human hair. After outlining the …

Most natural biomolecules have two enantiomeric forms and can exist in either of them.
Despite the L-type homochirality of natural biopolymers composed of amino acids, a great …

Paraphenylenediamine (PPD) is one of the main ingredients used in permanent hair dyes. It
is, however, known to cause allergic contact dermatitis and potentially serious systemic …

In this study, we developed a complex polyphenol‐metal ion system, in which two
polyphenols represented by gallic acid (GA) and tannic acid (TA) chelated with metal ions …

The development and characterization of reconstructed human epidermis (RHE) is an active
area of R&D. RHE can replace animal tissues in pharmaceutical, toxicological and cosmetic …