26 research outputs found
A Study of the Ligand Composition Change of the Eu3+ Chelate by Two-Stage Laser Excitation Luminescence and Computer Simulation of Kinetics
The europium(III)- tris(dibenzoylmethane)- triphenylphosphine oxide complex was studied in the polycrystalline state and in toluene at 298 K using the luminescence excitation method with two-stage rectangular pulses with decreasing intensity of stages. ΠΠΎΠΌΠΏΠ»Π΅ΠΊΡ Π΅Π²ΡΠΎΠΏΠΈΠΉ (III) - ΡΡΠΈ (Π΄ΠΈΠ±Π΅Π½Π·ΠΎΠΈΠ»ΠΌΠ΅ΡΠ°Π½)-ΡΡΠΈΡΠ΅Π½ΠΈΠ»ΡΠΎΡΡΠΈΠ½ΠΎΠΊΡΠΈΠ΄ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ Π² ΠΏΠΎΠ»ΠΈΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠΎΡΡΠΎΡΠ½ΠΈΠΈ ΠΈ ΡΠΎΠ»ΡΠΎΠ»Π΅ ΠΏΡΠΈ 298 K Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄Π° Π²ΠΎΠ·Π±ΡΠΆΠ΄Π΅Π½ΠΈΡ Π»ΡΠΌΠΈΠ½Π΅ΡΡΠ΅Π½ΡΠΈΠΈ Π΄Π²ΡΡ
ΡΡΡΠΏΠ΅Π½ΡΠ°ΡΡΠΌΠΈ ΠΏΡΡΠΌΠΎΡΠ³ΠΎΠ»ΡΠ½ΡΠΌΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ°ΠΌΠΈ ΡΠΎ ΡΠΏΠ°Π΄ΠΎΠΌ ΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΡΡΠΏΠ΅Π½Π΅ΠΉ
Determination of Rate Constants and the Mechanism of Phototransformations of Metalloporphyrins by Solving the Inverse Photokinetic Problem
ΠΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ ΠΎΠ±ΡΠ°ΡΠ½ΠΎΠΉ ΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π·Π°Π΄Π°ΡΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΠΊΠΈΠ½Π΅ΡΠΈΠΊΠΈ ΡΠ»ΡΠΎΡΠ΅ΡΡΠ΅Π½ΡΠΈΠΈ Π½Π΅ΠΊΠΎΡΠΎΡΡΡ
Π·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
Zn- ΠΈ Mg-ΠΏΠΎΡΡΠΈΡΠΈΠ½ΠΎΠ² Π² ΡΠ²Π΅ΡΠ΄ΡΡ
ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΡΡ
ΠΏΠ»Π΅Π½ΠΊΠ°Ρ
ΠΏΡΠΈ Π²ΠΎΠ·Π±ΡΠΆΠ΄Π΅Π½ΠΈΠΈ Π΄Π²ΡΡ
ΡΡΡΠΏΠ΅Π½ΡΠ°ΡΡΠΌΠΈ ΠΏΡΡΠΌΠΎΡΠ³ΠΎΠ»ΡΠ½ΡΠΌΠΈ Π»Π°Π·Π΅ΡΠ½ΡΠΌΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ°ΠΌΠΈ ΠΈ 293K. Fluorescence kinetics of some substituted Zn- and Mg-porphyrins in solid polymeric films upon excitation by two-step-wise rectangular laser pulses and at 293 K are studied by methods of the inverse kinetic problem
Π€ΠΎΡΠΎΠ΄Π΅ΡΡΡΡΠΊΡΠΈΡ ΡΠΈΠ½ΠΊΠΎΠ²ΡΡ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² ΡΠ΅ΡΡΠ°Π±Π΅Π½Π·ΠΎΠΏΠΎΡΡΠΈΡΠΈΠ½ΠΎΠ² Π² ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΠΎΠΉ ΠΌΠ°ΡΡΠΈΡΠ΅ ΠΈ ΡΠ²Π΅ΡΠΎΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°Ρ Π½Π° ΠΈΡ ΠΎΡΠ½ΠΎΠ²Π΅
At room temperature, a high-efficiency photochromogenic reaction of destruction of Zn-tetra (4-tert butylbenzoic) porphyrin molecules in a polyvinyl butyral matrix has been revealed. The linear dependence of the photobleaching rate of porphyrin on the irradiation power density is indicative of a single-photon character of the reaction. The influence of pyridine and ethyl iodide additives as well as of intermolecular oxygen on the photodissociation rate of pigment molecules has been investigated. ΠΡΠΈ ΠΊΠΎΠΌΠ½Π°ΡΠ½ΠΎΠΉ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅ ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΠΈΡ Π²ΡΡΠΎΠΊΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½Π°Ρ ΡΠΎΡΠΎΡ
ΡΠΎΠΌΠΎΠ³Π΅Π½Π½Π°Ρ ΡΠ΅Π°ΠΊΡΠΈΡ ΡΠ°Π·ΡΡΡΠ΅Π½ΠΈΡ Zn-ΡΠ΅ΡΡΠ° (4-ΡΡΠ΅Ρ-Π±ΡΡΠΈΠ»Π±Π΅Π½Π·ΠΎΠΉΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ) ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½Ρ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Ρ ΠΏΠΎΡΡΠΈΡΠΈΠ½Π° Π² ΠΏΠΎΠ»ΠΈΠ²ΠΈΠ½ΠΈΠ»Π±ΡΡΠΈΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΌΠ°ΡΡΠΈΡΠ΅. ΠΠΈΠ½Π΅ΠΉΠ½Π°Ρ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΡ ΡΠΊΠΎΡΠΎΡΡΠΈ ΡΠΎΡΠΎΠΎΠ±Π΅ΡΡΠ²Π΅ΡΠΈΠ²Π°Π½ΠΈΡ ΠΏΠΎΡΡΠΈΡΠΈΠ½Π° ΠΎΡ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π»ΡΡΠ΅Π½ΠΈΡ ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΠΎΠ΄Π½ΠΎΡΠΎΡΠΎΠ½Π½ΡΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ ΡΠ΅Π°ΠΊΡΠΈΠΈ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π΄ΠΎΠ±Π°Π²ΠΎΠΊ ΠΏΠΈΡΠΈΠ΄ΠΈΠ½Π° ΠΈ ΠΉΠΎΠ΄ΠΈΡΡΠΎΠ³ΠΎ ΡΡΠΈΠ»Π°, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΌΠ΅ΠΆΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π° Π½Π° ΡΠΊΠΎΡΠΎΡΡΡ ΡΠΎΡΠΎΠ΄ΠΈΡΡΠΎΡΠΈΠ°ΡΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ» ΠΏΠΈΠ³ΠΌΠ΅Π½ΡΠ°
Π’ΠΎΠ½ΠΊΠΎΡΡΡΡΠΊΡΡΡΠ½ΡΠ΅ ΠΊΠΎΠ»Π΅Π±Π°ΡΠ΅Π»ΡΠ½ΡΠ΅ ΡΠΏΠ΅ΠΊΡΡΡ ΠΈ NH-ΡΠΎΡΠΎΠ°Π²ΡΠΎΠΌΠ΅ΡΠΈΡ Π² Π½Π΅Π·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΠΎΠΌ 2,3-Π½Π°ΡΡΠ°Π»ΠΎΡΠΈΠ°Π½ΠΈΠ½Π΅ ΡΠΎ ΡΠ²ΠΎΠ±ΠΎΠ΄Π½ΡΠΌ ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π² Π½Π°ΡΡΠ°Π»ΠΈΠ½Π΅ ΠΏΡΠΈ 6 Π
Spectral-luminescent investigations of freebase unsubstituted 2,3-naphthalocyanine (2,3-Nh2) in naphthalene and tetrakis(tertbutyl)- derivative of 2,3-Nh2 in various solvents at room temperature, 77 and 6 K have been carried out. ΠΡΠ»ΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎ-Π»ΡΠΌΠΈΠ½Π΅ΡΡΠ΅Π½ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ²ΠΎΠ±ΠΎΠ΄Π½ΠΎΠΎΡΠ½ΠΎΠ²Π½ΠΎΠ³ΠΎ Π½Π΅Π·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΠΎΠ³ΠΎ 2,3-Π½Π°ΡΡΠ°Π»ΠΎΡΠΈΠ°Π½ΠΈΠ½Π° (2,3-Nh2) Π² Π½Π°ΡΡΠ°Π»ΠΈΠ½Π΅ ΠΈ ΡΠ΅ΡΡΠ°ΠΊΠΈΡ (ΡΡΠ΅Ρ-Π±ΡΡΠΈΠ»)- ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΠΎΠ³ΠΎ 2,3-Nh2 Π² ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΠ°ΡΡΠ²ΠΎΡΠΈΡΠ΅Π»ΡΡ
ΠΏΡΠΈ ΠΊΠΎΠΌΠ½Π°ΡΠ½ΠΎΠΉ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅, 77 ΠΈ 6 Π
ΠΡΠ½ΡΠΆΠ΄Π΅Π½Π½Π°Ρ ΡΠΌΠΈΡΡΠΈΡ Π² ΠΊΡΠΈΠΎΠ³Π΅Π½Π½ΡΡ ΠΎΠ±ΡΠ°Π·ΡΠ°Ρ , Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠ²ΠΎΠ±ΠΎΠ΄Π½ΡΠΌ ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠ΅ΡΡΠ°Π°Π·Π°ΠΏΠΎΡΡΠΈΠ½Π°
Thin cryogenic samples of inert gas solids doped with free-base tetraazaporphine (H2TAP) were irradiated with a tunable pulsed laser. ΠΡΠ»ΠΈ ΠΎΠ±Π»ΡΡΠ΅Π½Ρ ΡΠΎΠ½ΠΊΠΈΠ΅ ΠΊΡΠΈΠΎΠ³Π΅Π½Π½ΡΠ΅ ΠΎΠ±ΡΠ°Π·ΡΡ ΡΠ²Π΅ΡΠ΄ΡΡ
ΠΈΠ½Π΅ΡΡΠ½ΡΡ
Π³Π°Π·ΠΎΠ², Π΄ΠΎΠΏΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠ²ΠΎΠ±ΠΎΠ΄Π½ΡΠΌ ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠ΅ΡΡΠ°Π°Π·Π°ΠΏΠΎΡΡΠΈΠ½Π° (H2TAP) Ρ ΠΏΠ΅ΡΠ΅ΡΡΡΠ°ΠΈΠ²Π°Π΅ΠΌΡΠΌ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΡΠΌ Π»Π°Π·Π΅ΡΠΎΠΌ
ΠΠ»Π΅ΠΊΡΡΠΎΠ½Π½Π°Ρ ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΡ, ΡΡΠΈΠΌΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ΅ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΠ΅ ΠΈ ΡΡΠΎΠΉΠΊΠΎΠ΅ ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠ΅ Π²ΡΠΆΠΈΠ³Π°Π½ΠΈΠ΅ Π΄ΡΡ ΠΊΡΠΈΠΎΠ³Π΅Π½Π½ΡΡ Π°Π·ΠΎΡΠ½ΡΡ ΠΌΠ°ΡΡΠΈΡ, Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠ΅ΡΡΠ°Π±Π΅Π½Π·ΠΎΠΏΠΎΡΡΠΈΠ½ΠΎΠΌ
This paper deal with our on-going work on the electronic spectroscopy of tetrapyrrole molecules embedded in cryogenic hosts. ΠΡΠ° ΡΡΠ°ΡΡΡ ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° Π½Π°ΡΠ΅ΠΉ ΡΠ΅ΠΊΡΡΠ΅ΠΉ ΡΠ°Π±ΠΎΡΠ΅ ΠΏΠΎ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠΉ ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ» ΡΠ΅ΡΡΠ°ΠΏΠΈΡΡΠΎΠ»Π°, Π²ΡΡΡΠΎΠ΅Π½Π½ΡΡ
Π² ΠΊΡΠΈΠΎΠ³Π΅Π½Π½ΡΠ΅ Ρ
ΠΎΡΡΡ
Electronic spectroscopy, stimulated emission, and persistent spectral hole burning of cryogenic nitrogen matrices doped with tetrabenzoporphin
This paper deals with our on-going work on the electronic spectroscopy of tetrapyrrole molecules
embedded in cryogenic hosts. Under nanosecond laser excitation of free-base tetrabenzoporphin
molecules in a nitrogen matrix at 8K, increasing laser pulse energy results in essential enhancement
of the intensity of one or several vibronic emission lines in the fine-structure fluorescence spectrum.
Some characteristics of stimulated radiation are realized in the observed intense monochromatic
radiation as a result of a transition from the purely electronic S1 level to a vibrational sublevel of
the S0 state, corresponding to the excitation of CβC stretching vibrations of tetrapyrrole methane
bridges. We also report on persistent spectral hole-burning effects. Hole and antihole formation
analysis gives some insight on the photochemical properties of tetrabenzoporphin in a nitrogen
matrix