Picosecond fluorescence study of the lifetimes of metalloporphyrin S1 and S2 states

Aaviksoo, J.; Freiberg, Arvi; Savikhin, Sergei; Stelmakh, G. F.; Цвирко, М. П.

doi:10.1016/0009-2614(84)85505-0

Cited by 36 publications

(28 citation statements)

References 10 publications

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“…The lifetime of the S2 state was estimated to be 6 ps, which s comparable to that of the J-aggregate in aqueous solution. Up to now, only a few direct measurements of the lifetime of 52 state have been reported by using Streak camera and fluorescence up-conversion method [25][26][27]. The S2 lifetimes of 4.5 ps and < 2.5 ps were estimated for ruthenium and cadmium tetrabenzoporphyrins [26].…”

Section: Resultsmentioning

confidence: 99%

“…Up to now, only a few direct measurements of the lifetime of 52 state have been reported by using Streak camera and fluorescence up-conversion method [25][26][27]. The S2 lifetimes of 4.5 ps and < 2.5 ps were estimated for ruthenium and cadmium tetrabenzoporphyrins [26]. The S2 lifetimes of ZnTPP in acetonitrile, dichloromethane, and ethanol were 3.5 ps, 0.75 ps, and 2.35 ps, respectively [25,27].…”

Section: Resultsmentioning

confidence: 99%

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Time-Resolved and Near-Field Scanning Optical Microscopy Study on Porphyrin J-Aggregate

Miura

Matsumura

et al. 1998

Acta Phys. Pol. A

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Water-soluble porphyrin, 5,10,1 5,20-tetraphenyl-21Η,23Η-paorpahiυe-tetrasulfonic acid (TPPS), forms J-aggregate in aqueous solution depending on experimental conditions such as pH, dye concentration, and/or ionic strength. The steady-state fluorescence and picosecond single-photon timing spectroscopy were applied for protonated monomer and J-aggregate in aqueous solution and in thin films to reveal the dynamics in the S2 and S1 states. . The S2 fluorescence spectra from the protonated monomer and J-aggregate were observed in addition to the normal S 1 fluorescence. The lifetime of the S2 state was estimated to be 5 ps for J-aggregate, whereas the lifetime is shorter than 1 ps for protonated TPPS monomer. The mesoscopic structures of J-aggregate in thin film with and without polymer on the glass surface were examined by scanning near-field optical microscopy. With the surface topography and scanning near-field optical microscopy transmission images, TPPS J-aggregate was found to form a long and narrow tube-like structure which has a few μm length, 0.2-0.5 μm width, and 5-30 nm height. An unidirectional orientation of the structure was also found, which may be originated from the spin-coating process.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Time-Resolved and Near-Field Scanning Optical Microscopy Study on Porphyrin J-Aggregate

Miura

Matsumura

et al. 1998

Acta Phys. Pol. A

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“…2). However, with respect to the summarized fluorescence properties (see Table 1 [5,9,29], the Q(0,0) fluorescence band of Lu(III) porphyrins should be slightly more intensive than that of Gd(III) porphyrins with respect to their Q(0,1) fluorescence bands. Therefore, one can expect that the Q(0,0) fluorescence band of Lu(III) porphyrins provides a majority of the overall S 1 →S 0 fluorescence intensity (however, from the studied species, this regularity concerns TBP and EP complexes only [1]).…”

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confidence: 97%

“…It facilitates a clear registration of fluorescence due to occurrence of relatively intensive bands. Secondly, according to the intensity ratio of Q(0,0) and Q(0,1) fluorescence bands of lanthanide TBP complexes[9,29], the Q(0,0) fluorescence band provides a majority of the overall S 1 →S 0 fluorescence intensity. Thirdly, fluorescence of metalloporphyrins based on TBP ligand is the least disturbed by fluorescence of free-base porphyrins(Fig.…”

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Fluorescence and phosphorescence of lutetium(III) and gadolinium(III) porphyrins for the intraratiometric oxygen sensing

Калота

Цвирко

2015

Chemical Physics Letters

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“…Twophoton excitation spectroscopy was used to study the relationship between the efficiency of blue fluorescence from upper excited states (S 3,4 → S 0 for the free bases or S 2 → S 0 for metal complexes) and the position of even g-states of tetrapyrroles [87]. It is known that the quantum yield of blue S 2 → S 0 -fluorescence is determined by competition between the probability of radiative S 2 → S 0 -deactivation and the probability of radiationless internal S 2 → S 1 -conversion, which is the main channel for deactivation of the S 2 -state [88][89][90][91]. A possible explanation for the large differences in the probability of internal S 2 → S 1 -conversion was proposed based on quantum-chemical calculations using the PPDP/S method [59].…”

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Nonlinear optical properties of tetrapyrrole compounds and prospects for their application (a review)

Kruk

2008

J Appl Spectrosc

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The phenomenological description of second-(χ (2) ) and third-order (χ (3) ) nonlinear optical phenomena and studies on nonlinear optical properties of tetrapyrrole molecules are reviewed. Issues of the formation of twophoton absorption spectra of tetrapyrrole compounds and ways to synthesize new molecular systems possessing high nonlinear optical parameters are presented and discussed in detail. The experience of use of the nonlinear optical properties of tetrapyrrole compounds in industry, medicine, and biology and future trends in this area are presented and analyzed.Introduction. The rapid development and broad introduction of materials with nonlinear optical properties during the last decade have made photonic technologies an indispensable part of our daily life. Nonlinear optical materials are key elements in modern photonic technologies. They are used to fabricate components of computer and telecommunication systems, new high-density information-storage devices, optoelectronic sensors, image processing systems, and optical switches and connectors [1]. Much effort is being expended to develop photonic devices based on organic compounds with nonlinear optical properties. Previous investigations have shown that organic compounds with significant second-and third-order optical nonlinearity are promising materials for a wide range of photonic devices. Nonlinear optical materials based on organic compounds are potentially highly useful in various photonic devices because of the variety of molecular structures (from single molecules to organic polymers) and the ability for directed chemical modification of their functional properties. Nonlinear optical components can be integrated with electric, magnetic, and other optical components. Various nonlinear optical effects can be used to fabricate devices for different applications.The nonlinear optical properties of organic compounds can also be applied to biological investigations and in medicine. Multi-photon laser scanning microscopy is a new dynamically developing scientific field for the investigation of the structure and functional properties of biological subjects [2,3]. Multi-photon (as a rule, two-or three-photon is used) excitation provides the capability to use new spectral ranges, to isolate a region of photoexcitation of the studied tissues in the focal plane, to form an image with spatial resolution (3D-resolution), and to decrease substantially the background luminescence. These advantages of multi-photon excitation can be used to expand the capabilities of photodynamic therapy. It is expected that the use of this method will enable the depth of the photodynamic effect in tissues of patients to be increased and its range to be localized in a volume <1 µm 3 .Tetrapyrrole compounds exhibit nonlinear optical properties that are due to second (χ (2) ) and third (χ (3) ) order nonlinear susceptibilities. The cubic nonlinearity is the lowest order nonlinearity for most of them owing to the molecular symmetry. The variety of possible molecular structures of ...

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Picosecond fluorescence study of the lifetimes of metalloporphyrin S1 and S2 states

Cited by 36 publications

References 10 publications

Time-Resolved and Near-Field Scanning Optical Microscopy Study on Porphyrin J-Aggregate

Time-Resolved and Near-Field Scanning Optical Microscopy Study on Porphyrin J-Aggregate

Fluorescence and phosphorescence of lutetium(III) and gadolinium(III) porphyrins for the intraratiometric oxygen sensing

Nonlinear optical properties of tetrapyrrole compounds and prospects for their application (a review)

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