Optical Properties and Amplified Spontaneous Emission of Novel MDMO-PPV/C500 Hybrid

Abstract

Abstract:The influence of the solvent nature on optical properties of poly[2-methoxy-5-3,7-dimethyloctyloxy-1,4-phenylenevinylene] (MDMO-PPV)/Coumarine 500 (C500) have been investigated. In addition, the amplified spontaneous emission (ASE) from MDMO-PPV and efficient energy transfer between the MDMO-PPV and C500 has been verified. The MDMO-PPV was dissolved in aromatic and nonaromatic solvents, while the solution blending method was employed to prepare the MDMO-PPV:C500 hybrid. The quantum yield of the MDMO-PPV was found to increase with the reduction of a few factors such as polarity index of the solvent, absorption cross section (σ a ), emission cross section (σ e ), and extinction coefficient (ε max ). The fluorescence spectra of the MDMO-PPV appears from two vibronic band transitions (0-0, 0-1) and the ASE occurs at 0-1 transition, which was verified by the ASE from MDMO-PPV. The MDMO-PPV in toluene exhibited the best ASE efficiency due to its high quantum yield compared with other solvents. Strong overlap between the absorption spectrum of MDMO-PPV and emission spectrum of C500 confirmed the efficient energy transfer between them. Moreover, the ASE for energy transfer of the MDMO-PPV:C500 hybrid was proved.

Adaptive and sensitive fibre-optic fluorimetric transducer for air- and water-borne analytes

“…4. Fluorescence intensity is in fact enhanced (formally expressed as negative FQR) under toluene vapour, which agrees with the known property of PPV polymers that they are highly fluorescent in organic solvents [25], even brighter than in solid films, due to separation of fluorophores from mutual interactions. Sensing is hence not compromised by a response to interferants.…”

High photothermal conversion efficiency for semiconducting polymer/fullerene nanoparticles and its correlation with photoluminescence quenching

“…4(b) for PPV-0 has characteristic peaks at 585 nm, 632 nm and 695 nm, respectively. 105 With the fullerene doping, 585 nm peak is blue shifted by around 2 nm relative to the same band observed in the SPNs of pure PPV. Again, those features can be explained by the reduction of the effective conjugation length due to steric effects produced by the presence of the PC 71 BM molecule.…”

Influence of Diethyl Phthalate (DEP) on Fluorescence Emission Quenching of Poly Vinyl Chloride (PVC) in Solid Films

“…The radiative and non-radiative which involve all possible pathways of the fluorescence deactivation such as internal conversion, intersystem crossing, or other intra-and intermolecular quenching mechanisms. The mechanism of the quenching process includes energy transfer between fluorophore molecules (donor) in an electronically excited state to an adjacent quencher molecule (acceptor) [2][3][4]. When fluorophore molecule becomes excited, emits fluorescence, and a quencher will reduce that fluorescence by energy transfer from an excited species to another molecule [5].…”