Ground and excited state chemistry of some hydrophilic thiazine dyes for possible photogalvanic applications

Technical Report · Sun Aug 01 00:00:00 EDT 1982

OSTI ID:5265538

Burton, W C

The research was designed to study the ground and excited state properties of hydrophilic analogues of the thiazine dye, thionine. The analogues were prepared by substituting ..beta..-hydroxyethyl or N-methylpiperazine groups onto the thiazine chromophore. Positive charges were introduced into the analogues containing the N-methylpiperazine groups by methylation of the N-methyl nitrogen atom of the piperazine ring. After purification and characterization of the analogues, ground state properties such as water solubility and aggregation were studied. Excited state studies involved determination of triplet state lifetimes (tau), and triplet state rate constants for, self quenching, (k/sub SQ/), ferrous quenching (k/sub Q/), and bromide and iodide (k/sub Br/ and K/sub I/) quenching. Oxidation and decay of the photoproducts, semireduced dyes and leuco dyes, was also studied.

• Research Organization: University of Southern Mississippi, Hattiesburg (USA)
• DOE Contract Number: FG02-79ER10534
• OSTI ID: 5265538
• Report Number(s): DOE/ER/10534-T2; ON: DE84009096
• Resource Relation: Other Information: Thesis
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
PHOTOGALVANIC CELLS
DYES
THIONINE
EXCITED STATES
GROUND STATES
ABSORPTION SPECTRA
AGGLOMERATION
LIFETIME
PHOTOLYSIS
QUENCHING
SOLUBILITY
AMINES
CHEMICAL REACTIONS
DECOMPOSITION
ELECTROCHEMICAL CELLS
ENERGY LEVELS
EQUIPMENT
HETEROCYCLIC COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
SOLAR EQUIPMENT
SPECTRA
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)