Photochemistry of transition-metal phthalocyanines. Monophotonic and sequential biphotonic photochemical processes of copper(II) tetrakis(N-octadecylsulfamoyl)phthalocyanine in nonaqueous media

Journal Article · Sun Aug 01 04:00:00 EDT 1982 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00138a011· OSTI ID:6613238

Prasad, D R; Ferraudi, G

The photochemistry of dimeric and monomeric copper(II) tetrakis(N-octadecylsulfamoyl)phthalocyanine in chloroform has been investigated by steady-state, flash and laser flash photolysis. The decay of a low-lying ..pi pi..* triplet-doublet with k approx. = 2 x 10/sup 7/ s/sup -1/ was observed in laser flash photolysis. Similar observations were carried out with related complexes. Moreover, long-lived transformations were assigned to the formation of a copper(III) phthalocyanine. Product yields were determined as a function of the excitation wavelength and light intensity. Excitations on the Q band, lambda approx. = 600 nm, with high intensities from a focused dye laser induce a photochemistry otherwise observed for excitations at lambda less than or equal to 350 nm. Mechanisms involving short-lived n..pi..* states and two-photon photochemistry involving a low-lying and long-lived ..pi pi..* triplet-doublet are discussed. 6 figures, 2 tables.

• OSTI ID: 6613238
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 21:8; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400400 -- Electrochemistry
400500* -- Photochemistry
ABSORPTION SPECTRA
ACETIC ACID
ALCOHOLS
ALKANES
ALKENES
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORIDES
CHLORINATED ALIPHATIC HYDROCARBONS
CHLORINE COMPOUNDS
CHLOROFORM
CHROMATOGRAPHY
COMPLEXES
COPPER COMPLEXES
CYCLOALKENES
DATA
DECOMPOSITION
DIMERS
DISPERSIONS
DMSO
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
ESTERS
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
ION SELECTIVE ELECTRODE ANALYSIS
IONIZATION
KINETICS
LASER RADIATION
LIGANDS
METASTABLE STATES
METHYLENE CHLORIDE
MIXTURES
MONOCARBOXYLIC ACIDS
MONOMERS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
ORGANIC SULFUR COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
PROPANOLS
RADIATIONS
REACTION INTERMEDIATES
REACTION KINETICS
SEPARATION PROCESSES
SOLVENTS
SPECTRA
SULFOXIDES
SULFURIC ACID ESTERS
TIME DEPENDENCE
TRANSITION ELEMENT COMPLEXES
ULTRAVIOLET RADIATION
YIELDS