Spectral characteristics and fluorescence quenching of N,N′-bis(4-pyridyl)-3,4:9,10-perylenebis(dicarboximide) (BPPD)

• Published in: Journal of luminescence 2012-10, Vol.132 (10), p.2747-2752
• Main Authors: El-Daly, Samy A., Alamry, Khalid A., Asiri, Abdullah M., Hussein, Mahmoud A.
• Format: Article
• Language: English
• Subjects: Atomic and molecular physics; Calculations and mathematical techniques in atomic and molecular physics (excluding electron correlation calculations); Density-functional theory; Electronic structure of atoms, molecules and their ions: theory; Exact sciences and technology; Fluorescence and phosphorescence spectra; Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion); Fluorescence quantum yield; Fluorescence quenching; Hydrated iron oxide nanoparticles; Molecular aggregation; Molecular properties and interactions with photons; N,N′-bis(4-pyridyl)-3,4:9,10-perylene bis(dicarboximide); Physics
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2012.05.017

The photophysical properties such as electronic absorption, molar absorptivity, emission spectra, fluorescence quantum yield and fluorescence lifetime of N,N′-bis(4-pyridyl)-3,4:9,10-perylene bis(dicarboximide) (BPPD) have been measured in different solvents. Both electronic absorption and fluorescence spectra are not sensitive to medium polarity, while the fluorescence quantum yield (ϕf) is solvent dependent. The ground state geometry has been computed by using density functional theory (DFT), the transition from HOMO to LUMO from perylene core with maximum absorption at 512nm and HOMO–LUMO energy difference equal 2.53eV. BPPD dye undergoes molecular aggregation to dimmer or higher aggregates in dimethyl sulfoxide (DMSO). Crystalline solids of BPPD gives excimer-like emission at 676nm. The fluorescence quenching of BPPD is also studied using hydrated ferric oxide nanoparticle (FeOOH), and the Stern–Volmer rate constants (Ksv) were calculated as 8×106 and 9.2×106M−1 in ethanol and ethylene glycol, respectively.