Effect of Sm(DBM)3Phen incorporation methodology on spectroscopic properties of PVA nanofibres

Abstract

Electrospun nanofibres are an advancing area of research because of their flexible characteristics and numerous applications in sensors, optoelectronic devices, etc. Herein, we first prepared lanthanide complex Sm(DBM)3Phen. The synthesized complex was then incorporated into and onto the surface. The detailed study of spectroscopic properties of electrospun nanofibres into and onto the surface is presented. The fabricated nanofibres of Sm(DBM)3Phen into the nanofibres surface had a diameter of around 295 nm and length > 200 µm and the surface morphology of the complex incorporated nanofibres presented that the nanofibres were smooth and straight and were highly interlaced. The nanofibres with Sm complex on the surface presented a rough surface morphology. The spectroscopic analysis shows energy transfer from the ligand Dibenzoylmethane (DBM) to Sm3+ ion, enhancing its photoluminescence intensity. Under UV excitation, the Sm(DBM)3Phen incorporated nanofibres exhibited emission peaks between 550 nm and 710 nm and with sharp peaks at 564, 598 nm, and 646 nm, which are assigned to the transition from 4G5/2 to 6HJ (J = 5/2, 7/2, and 9/2) attributed to DBM. The photoluminescence intensity of the two nanofibres varied with the incorporation method. A detailed spectroscopic analysis of the synthesized samples with the incorporation methodology is carried out.