Color tunable luminescent cellulose acetate nanofibers functionalized by CuI-based complexes

Cellulose as an Eco-Friendly and Sustainable Material for Optical Anticounterfeiting Applications: An Up-to-Date Appraisal

“…Recently, research efforts have been dedicated to developing eco-friendly, low-cost, and color-tunable fluorescent fibers. 69 Biopolymer cellulose can be used as reinforcement fiber and matrix material. These reinforcement fibers not only are recyclable and biodegradable but also display excellent fiber–matrix adhesion and good mechanical performance.…”

“…Therefore, Chen et al combined this optical material and cellulose acetate nanofibers through a simple top-down electrospinning process to obtain four types of one-dimensional (1D) luminescent inorganic–organic hybrid nanofibers. 69 The emission color of the prepared CuI-organic ligand–cellulose acetate nanofibers was tunable through modification of the ligands: purple for (3-picoline) 4 , blue for triphenyl phosphine (PPh 3 ) 2 (3-picoline) 2 , orange for (pyrazine)(PPh 3 ) 2 , and yellow for (4,4 | -bipyridine)(PPh 3 ) 2 ( Figure 3 a). The bonding sites of the polymer, conformation of polymer chains, density of the electrospun solutions, the distance between the needle and collector, feeding rate, and the applied voltage decide the surface morphology of the fibers.…”

“…However, luminescent dye-based fluorescent fibers are non-environmentally friendly, expensive, and have poor photostability, which limit their industrial applicability. Recently, research efforts have been dedicated to developing eco-friendly, low-cost, and color-tunable fluorescent fibers . Biopolymer cellulose can be used as reinforcement fiber and matrix material.…”

“…Coordination complexes based on Copper­(I) iodide (CuI) are renowned for their strongly emissive optical features due to the Cu 2 I 2 dimer retained in a ligand-exchange process. Therefore, Chen et al combined this optical material and cellulose acetate nanofibers through a simple top-down electrospinning process to obtain four types of one-dimensional (1D) luminescent inorganic–organic hybrid nanofibers . The emission color of the prepared CuI-organic ligand–cellulose acetate nanofibers was tunable through modification of the ligands: purple for (3-picoline) 4 , blue for triphenyl phosphine (PPh 3 ) 2 (3-picoline) 2 , orange for (pyrazine)­(PPh 3 ) 2 , and yellow for (4,4 | -bipyridine)­(PPh 3 ) 2 (Figure a).…”