Photoluminescence solid-state

The electroluminescence spectra of the single-layer devices are depicted in Figure 16-40. For all these OPV5s, EL spectra coincided with the solid-state photoluminescence spectra, indicating that the same excited states are involved in both PL and EL. The broad luminescence spectrum for Ooct-OPV5-CN" is attributed to excimer emission (Section 16.3.1.4). 

Fig. 2. Photoluminescence spectra of the methyl-substituted Me-LPPP (29) (solid line solid state dashed line solution, methylene chloride)...

Another property that should be present in this type of complex is photoluminescence in recent decades this has attracted the attention of many gold researchers. It may well be possible, that many older complexes might also be photoluminescent but have simply not been studied. [ Au(C6E5) 2 (P Pr2)2CH2 ] [93] in the solid state at room temperature shows an excitation maximum at 335 nm and an emission... 

The [Au2(dcpm)2]X2 complexes (X = C104, PF ", Cp3S03, Au(CN)2 ) display intense photoluminescence with Amax at 360-368 nm in the solid state at room temperature and in glassy solutions at 77 K. Solid samples of [Au2(dcpm)2](C104)2 and [Au2(dcpm)2](PF6)2 individually display a weak visible emission at Xmax= 564 and 505 nm, respectively, but a similar emission is not detected for [Au2(dcpm)2]... 

A tetrameric structure with the Zn40 core can also be formed with the 7-azaindolate ligand, [Zn40(C7H5N2)6], and has been structurally characterized. The tetramer displays intense photoluminescence at 448 nm in the solid state and 425 nm in acetonitrile with a lifetime and quantum yield of 0.1 ps and 0.17 ps respectively.280... 

C. Weder and M.S. Wrighton, Efficient solid-state photoluminescence in new poly(2,5-dialkoxy-/j-phenylene ethynyleness, Macromolecules, 29 5157-5165, 1996. 

GG Roberts, M McGinnity, WA Barlow, and PS Vincett, Electroluminescence, photoluminescence and electroabsorption of a lightly substituted anthracene Langmuir film, Solid State Commun., 32 683-686, 1979. 

The emissive counterpart to CD is circularly polarized photoluminescence (CPPL). Where the fluorophore is chiral, then the photo-excited state can return to the ground state with emission of circularly polarized light, the direction of polarization of which depends on the relative intensities of the right-handed and left-handed emissions (/r and /L, respectively), which in turn depends on the chirality of the material, or more accurately, the chirality of the photo-excited state of the material. CPPL studies on poly silanes are extremely rare, however, due to the low CPPL intensity and rapid sample degradation in solution, and problems due to artifacts in the solid state. 

Ohno T, Matsuishi K, Onari S (1997) Effects of laser irradiation on photoluminescence of C-60 single crystal with/without air exposure. Solid State Communications 101 785-789. 

The first chemical transformations carried out with Cjq were reductions. After the pronounced electrophilicity of the fullerenes was recognized, electron transfer reactions with electropositive metals, organometallic compounds, strong organic donor molecules as well as electrochemical and photochemical reductions have been used to prepare fulleride salts respectively fulleride anions. Functionalized fulleride anions and salts have been mostly prepared by reactions with carbanions or by removing the proton from hydrofullerenes. Some of these systems, either functionalized or derived from pristine Cjq, exhibit extraordinary solid-state properties such as superconductivity and molecular ferromagnetism. Fullerides are promising candidates for nonlinear optical materials and may be used for enhanced photoluminescence material. 

Zhang J, Sun LD, Liao CS, Yan CH (2002) Size control and photoluminescence enhancement of CdS nanoparticles prepared via reverse micelle method. Solid State Commun 124 45-48... 

Starodub VM, Fedorenko LL, Starodub NF (1998) Control of a myoglobin level in solution by the bioaffine sensor based on the photoluminescence of porous sihcon. In Proceedings of the european conference on solid-state transducers and 9th UK conference on sensors and their apphcations, Southampton, UK, 2 817-820, 13-16 Sept 1998... 

---