ISSN:
1572-901X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary The method of static quenching of first order luminescence (T=77 K, matrix = CH2Cl2 or 2∶4∶1 EtOH ∶ Et2O ∶ C5H12) has been used to study complex formation in a two-component system involving an alizarine (Q) derivative (PPh4Q, (PPh4)2[PdQ2], (NBu4)Q, (NBu4)[PdQ2] electron donor, and a nitro- or cyano-containing electron acceptor:m-dinitrobenzene (m-DNB), 1,3,5-trinitrobenzene (TNB), 9-dicyanomethylene-2,4,7-trinitrofluorenone (DTF), tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanochinodimethane (TCNQ). The quenching constants (Kq) and the electron affinity (Ea) of the electron acceptors change systematically. The lnKq-Ea correlation has been used to analyze the stability of the donor-acceptor complexes studied and the interrelation between different mechanisms for the quenching of the donors' luminescence. The data obtained have been interpreted in terms of the peripheral mechanism of catalytic action for complexes of platinum metals with dyes in the hydrogenation of aromatic nitrocompounds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00620872
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