Intermolecular charge-transfer emission

AuIr(CH3CN)2(dppm)], display a similar luminescence due to the Au-Ir o (J- Au-Ir o (p-p) transition.The most impressive are heteronuclear Intermolecular Charge-Transfer Emission... 

Two commonly used terms for intermolecular charge-transfer emission materials are exciplex and excimer. The former refers to an excited state charge-transfer complex and the latter to an excited state dimer. For example, anthracene and diethylaniline form an exciplex that has a broad emission band at A, = 485 nm. The best-known excimer is pyrene, which displays an intense excimer emission band at A = 470 nm in a relatively concentrated solution M). Excimers formed by aromatic... 

The emission intensity of blends of polyimides gives a measure of the degree of miscibility of two polymers.401 For example in blends of the strongly fluorescent polyimide (32) and the non-fluorescent polyimide (34) added at the level of 30 mo %, the intensity of the emission of (32) is quenched by half, indicating that the formation of intermolecular charge transfer complexes within (32) is disturbed significantly by the added polyimide. 

The decrease of resistance in the PANI(eb) samples containing the [Ru(dmb)3](PF6)2 chromophore was attributed to an excited state intermolecular charge transfer reaction as described in Eq. (2). This reaction mechanism would result in the formation of charge defects that enhance the overall conductivity [126,127], Both the emission quenching experiment and the transient absorption measurements in solution are consistent with the formation of charge transfer... 

The influence of the ligand field on the electronic states of lanthanides is small and generally of the order of 200 cm-1. Because the ligand field perturbation of J states are minimal, the f-f electronic transitions are sharp. In addition to f-f transitions, both 4f —> 5d and charge transfer transitions are also observed in the spectra of lanthanides [92]. Lanthanide ions exhibit emission in the solid state, and in some cases in aqueous solutions. Energy transfer from the ligand or intermolecularly from an excited state can give rise to the emission from lanthanide ions. 

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