inorganic chemistry

dendrimers with one or more metal complexes as branching centers (Fig. 2a and b); dendrimers capable of coordinating one or mor ...

conversion, rate constantkic); radiative decay to the ground state (fluorescence, kfl); conversion to the lowest triplet state T ...

The kinetic constants of the deactivation processes usually can- not be measured directly. What can be easily measured is the li ...

ABþhn!AB ð 9 Þ AB!AB ð 10 Þ AB!AþB ð 11 Þ AB!ABþ ð 12 Þ These types of processes can also occur between molecular ...

When an excited state of a molecule undergoes strong elec- tronic interaction with a nearby ground state molecule, new chemical ...

(donor) ground state molecule; for example, between excited states of aromatic molecules (electron acceptors) and amines (electr ...

It should be noted that the 1,3-dimethoxybenzene and 2- naphthyl chromophoric units contained in the branches of the dendrimer a ...

completely quenched with concomitant sensitization of the orange [Ru(bpy) 3 ]^2 þ phosphorescence (lmax¼610 nm). These results s ...

turn depends on the metal position, inner or outer, within the dendritic array), and the ligands, each metal-based subunit is ch ...

exhibit practically identical photophysical properties, since the lowest energy subunit(s) is in all the cases the identical per ...

For historical reasons, examples of case 2d, containing multi- ple amine or amide groups in their branches, will be discussed fi ...

spectral region and an intense fluorescence band in the visible region. In acetonitrile/dichloromethane (5:1, v/v) solution, the ...

protonated dansyl units; (vi) in the case of Yb^3 þ, the sensitization of the near-infrared MC emission occurs via the intermedi ...

Compound 4 (Fig. 9) is the fourth generation dendrimer 4D that contains 30 tertiary amine units and 32 dansyl functions. The dan ...

(i) the absorption and fluorescence spectra of a monodansyl refer- ence compound are not affected by addition of Co^2 þions; (ii ...

B. DENDRIMERS WITH ASINGLECOORDINATIONSITE A much better defined coordination arrangement around a metal ion is obtained when a ...

complexes that cannot exhibit MC or CT excited states at low energy. Nevertheless, Zn^2 þcoordination by the dendrimer causes st ...

branches are likely extending outward (Fig. 12). Further, the two cyclam cores, to account for the coordination number (6) of Z ...

A step further in cyclam-based dendritic ligands for metal ions is constituted by dendrimer 6 (Fig. 13), containing two covalent ...

branches favor coordination of cyclam units to metal ions with respect to solvent molecules and counter ions. Further, the exper ...