Reductive quenching of Ru(bpy)/sub 3//sup 2 +/ at high pressures

Journal Article · Thu Jun 16 04:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100323a025· OSTI ID:6084004

Fetterolf, M L; Offen, H W

The reductive quenching of Ru(bpy)/sub 3//sup 2 +/ bu several aromatic amines was studied at higher pressures (0.1-300 MPa) in acetonitrile (CH/sub 3/CN) and n-butyl alcohol (n-BuOH). The luminescence lifetimes are lengthened with increasing pressures. This results in positive activation volumes for the quenching rate constants k/sub q/ ranging in value from approx. = 1 mL/mol for dimethylaniline quencher in CH/sub 3/CN to 13 mL/mol for benzidine in n-BuOH at 25/sup 0/C range. The pressure dependence of k/sub q/ for Ru(bpy)/sub 3//sup 2 +//DMA in CH/sub 3/CN was insensitive to temperature in the 15-45/sup 0/C range. The pressure results are discussed in terms of the commonly accepted mechanism for electron transfer in the activation- and diffusion-controlled limits.

• Research Organization: Univ. of California, Santa Barbara (USA)
• OSTI ID: 6084004
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:12; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMINES
ARRHENIUS EQUATION
AZINES
BIPYRIDINES
DATA
DE-EXCITATION
ELECTRON TRANSFER
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HIGH PRESSURE
INFORMATION
LIFETIME
LUMINESCENCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PRESSURE DEPENDENCE
PYRIDINES
RADIATIONLESS DECAY
REFRACTORY METAL COMPOUNDS
RUTHENIUM COMPOUNDS
SOLVENTS
TRANSITION ELEMENT COMPOUNDS