Dual fluorescence from two erbium(III) porphyrins

Journal Article · Thu Aug 14 00:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100408a016· OSTI ID:5398588

Kaizu, Y; Asano, M; Kobayashi, H

TPPErOH (TPP, 5,10,15,20-tetraphenylporphin) as well as TPPEr(dpm)(dpm, 2,2,6,6-tetramethyl-3,5-heptanedione) fluoresces not only from the lowest excited singlet (S/sub 1/) state but also from the second excited singlet (S/sub 2/) state, while OEPErOH (OEP, 2,3,7,8,12,13,17,18-octaethylporphin) emits only from S/sub 1/ state. TPPEr(dpm) is in two different conformations in methanol/ethanol (7:3 v/v) glass at 77 K; the conformer with the central metal ion displaced out of the porphyrin plane emits no S/sub 2/ fluorescence, while the other conformer with the central metal ion in the porphyrin plane does emit S/sub 2/ fluorescence. Upon irradiation in the ultraviolet band around 300 nm, TPPEr(dpm) emits form both porphyrin S/sub 2/ and coordinated ..beta..-diketone T/sub 1/ (the lowest excited triplet) states.

• Research Organization: Tokyo Institute of Technology (Japan)
• OSTI ID: 5398588
• Journal Information: J. Phys. Chem.; (United States), Vol. 90:17
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ERBIUM COMPLEXES
FLUORESCENCE
PORPHYRINS
ABSORPTION SPECTROSCOPY
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
GLASS
LIFETIME
LOW TEMPERATURE
METHANOL
PARAMAGNETISM
QUANTUM EFFICIENCY
ALCOHOLS
CARBOXYLIC ACIDS
COMPLEXES
DATA
EFFICIENCY
EMISSION SPECTROSCOPY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
LUMINESCENCE
MAGNETISM
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RARE EARTH COMPLEXES
SPECTROSCOPY
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)