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7933188 
Journal Article 
Visible light and water-soluble photoinitiating system based on the charge transfer complex for free radical photopolymerization 
Li, J; Zhang, Xin; Nie, Jun; Zhu, X 
2020 
Yes 
Journal of Photochemistry and Photobiology A: Chemistry
ISSN: 1010-6030
EISSN: 1873-2666 
402 
English 
WOS:000582481800011 
Visible light and water-soluble photoinitiator is of great significance in the field of photopolymerization, especially for the fabrication of hydrogel or 3D printing. Photoinitiator with the characters of water-soluble and visible light represents the important advances in the field of hydrogel preparation. However, most of photoinitiator is not water soluble. In this work, electron transfer complex(CTC) photoinitiating system formed by water-insoluble photoinitiator (2E,6E)-2,6-bis(furan-2-ylmethylidene) cyclohexan-1-one(BFC)(electron acceptor) and water-soluble coinitiator triethanolamine(TEOA)(electron donor) for free radical photopolymerization was reported and characterized by molecular orbital calculations(MOC) theoretically and UV–vis, fluorescence spectroscopy analysis experimentally. Based on the strong CTC effect, not only [BFC-TEOA]CTC exhibited an extended absorption in the visible light region, but also [BFC-TEOA]CTC performed enhanced water-solubility. Photopolymerization kinetics proved [BFC-TEOA]CTC at the concentration of 2 wt% could initiate polymerization of waterborne monomer AM rapidly and effectively in water. This facial method especially converting water-insoluble photoinitiator into water-soluble photoinitiating system via CTC was convenient and low-cost, could be potential for photopolymerization. 2020 Elsevier B.V. 
Charge transfer complex; Water-solubility; Visible light; Photopolymerization