Abstract
Tunable fluorescent luminescent materials have attracted much attention in many fields of application. Herein, Tb(PABA)3Phen with red fluorescence and Eu(PABA)3Phen with green fluorescence were synthesized by using p-aminobenzoic acid (PABA) and o-phenanthroline (Phen) as the first and second ligands and Tb3+ and Eu3+ as the central ions. Then, Ln3+ (Ln = Eu, Tb) was bonded to the polyurethane chains as chain extenders to prepare waterborne polyurethane complexes with tunable fluorescence and antibacterial activity (WPU-TbxEu1-x). The bonding of Tb(PABA)3Phen and Eu(PABA)3Phen on polyurethane chains significantly improved the compatibility of soft and rigid polyurethane segments and reduced the degree of phase separation. WPU-TbxEu1-x had good thermal stability and above 220 °C decomposition temperature. Notably, WPU-TbxEu1-x achieves adjustable fluorescence from red to green by adjusting Tb(PABA)3Phen and Eu(PABA)3Phen into the polyurethane chains. Compared with Tb(PABA)3Phen and Eu(PABA)3Phen, the fluorescence lifetimes of WPU-Tb1.0Eu0 and WPU-Tb0Eu1.0 are significantly longer, reaching 1.375 ms and 1.05 ms, respectively. WPU-Tb1.0Eu0 and WPU-Tb0EU1.0 have excellent antibacterial effects against Staphylococcus aureus and Escherichia coli and can be used as a WPU-Tb1.0Eu0 and WPU-Tb0Eu1.0 have fantastic antibacterial effects on S. aureus and E. coli and can be used as an environmentally friendly antibacterial material with broad application prospects. More importantly, WPU-TbxEu1-x uses water as a dispersed phase, which is particularly safe and environmentally friendly.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
