Optical absorption and photoluminescence of lumonophore nanocomposites

Abstract

The europium complex tris(dibenzoylmethane)(monophenanthroline)europium (III) (Eu(DBM)3Phen) was successfully incorporated with different molar ratios into organic copolymer matrix of styrene:butylmethacrilate (1:1) (SBMA) via sol–gel process. Spin‐coated thin films were obtained. The layers turn out to be transparent in optical range of investigation. Absorption and luminescence properties of a europium complex on each step of technology nanocomposites of the pure Eu(DBM)3Phen complex powder, its solution with SBMA and the resultant thin films nanocomposites (NC) phosphors (SBMA ‐Eu(DBM)3Phen) were investigated. The microscopic investigations of the morphology of the NC surface show that the dimensions of Eu(DBM)3Phen particles, incorporated in the polymer matrix are less than 100 nm. The forbidden bands of NC were obtained. Photoluminescence (PL) spectra have been measured exciting with N2‐laser (λ = 0.334 μm) and they were revealed the radiative bands between the energy levels of the europium ions centered at 578, 590, 615, 652, and 705 nm and can be attributed to the spin forbidden f‐f transitions 5D0 → 7Fi (i = 0,1,2,3 and 4), respectively (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Study on the Interaction Between Bovine Serum Albumin and Terbium Complex Containing Polymer

“…A variety of polymers containing rare earth metal have been synthesized (5-7) and applied as functional materials in many fields including (8)(9)(10)(11)(12)(13) sensors and detectors (14)(15)(16)(17)(18), carriers (19,20), and so on (21)(22)(23). Probably, the simplest approach for the preparation of rare earth metal containing polymer is doping or blending (24), which specifically includes sol-gel (25), electrospinning (26), and supercritical carbon dioxide method (27). However, due to the lack of strong binding forces between polymers and rare earth elements, phase separation is highly likely to take place in this doped-type polymer over time, which leads to destabilization.…”

Fabrication of BCNO-composite thin film phosphors and controlling its thickness

“…Because of longterm stability, high image resolution, thermal stability, good heat resistance, and superior adhesion to the substrate, film type phosphors are more applicable than powder form [1]. Film phosphor technology can be used in many applications, such as: photoluminescent LCDs, field emission displays, cathode ray tubes, plasma display panels, electroluminescent displays, wavelength converter in solar cell, and other optoelectronic devices [1][2][3] Phosphor film can be synthesized by using several methods such as: sputtering deposition [4], pulsed layer deposition [5], atomic layer deposition [6], spray pyrolysis [7], and chemical vapor deposition [8]. However, these methods require complicated and expensive equipment since need a vacuum condition.…”

“…EXPERIMENT BCNO phosphor powder was prepared using simple heating method. Boric acid [B(OH) 3 with Mw = 61.83 g mol í1 ], urea [(NH 2 ) 2 CO, with Mw=60.07 g mol -1 ] and Polyethylene glycol (PEG) [C 2n+2 H 4n+2 O n+2 with Mw=20.000k g mol -1 ] were used as boron, nitrogen, and carbon source, respectively. To obtain homogenous BCNO particles, silica nanoparticles were added.…”

Development of metal-polymer luminescent markers for bioimaging: synthesis and optical properties of polymeric europium complexes based on polyvinylpyrrolidone derivatives

“…When carboxylate groups are present in the polymer chain, PVP is able to form complexes with metal ions and inorganic salts. It has been demonstrated that the introduction of the Eu(tta)2(Ph3PO)2NO3 (tta = thenoyltrifluoroacetonate) complex into PVP results in a twofold increase in luminescence intensity [35], which is likely due to the efficient energy transfer to the luminescent metal center through the polymer matrix. It has been demonstrated that complexes of other lanthanides can bind to carboxyl groups of the polymer to form labile metal-polymer complexes (MPC), which results in alterations to the luminescent properties [36].…”