1997
DOI: 10.1021/jp9705481
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Hole-Burning Study of Primary Photochemistry of Metalloporphyrins in Reactive Solvent Glasses

Abstract: Intermolecular photoprocesses in glassy solutions of magnesium octaethylporphine (MgOEP) and zinc tetrabenzoporphine (ZnTBP) have been investigated under one- and two-color irradiation between 8 and 80 K. The simultaneous exposure to the pulsed laser light in resonance with the 0−0 S1 ← S0 transition and the continuous blue light absorbed by the T n ← T1 transitions leads to a much faster hole burning than the irradiation with the laser light alone. This photon gating effect is observed in many reactive solve… Show more

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Cited by 8 publications
(5 citation statements)
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“…In contrast to the results in [1], and in correspondence with the observations in [2], the long living IS is not likely the triplet state of H 2 -TBNP, since in general phthalocyanines have a much shorter triplet state lifetime of the order of 1 ms [8]. An unusual feature of the observed gated holes is their small width of about 400 MHz, which is close to that for nongated materials, and about 10-20 times less than typically observed in other gated PSHB materials [1][2][3][4]. The reason for such narrow holes is likely related to a relatively low concentration of acceptor molecules 1-ClA of about 10 À4 mol/l due to the lesser influence of the electric field induced by D-A pair formation [1].…”
Section: Spectroscopy and Spectral Hole Burningsupporting
confidence: 85%
See 1 more Smart Citation
“…In contrast to the results in [1], and in correspondence with the observations in [2], the long living IS is not likely the triplet state of H 2 -TBNP, since in general phthalocyanines have a much shorter triplet state lifetime of the order of 1 ms [8]. An unusual feature of the observed gated holes is their small width of about 400 MHz, which is close to that for nongated materials, and about 10-20 times less than typically observed in other gated PSHB materials [1][2][3][4]. The reason for such narrow holes is likely related to a relatively low concentration of acceptor molecules 1-ClA of about 10 À4 mol/l due to the lesser influence of the electric field induced by D-A pair formation [1].…”
Section: Spectroscopy and Spectral Hole Burningsupporting
confidence: 85%
“…Many of these materials exhibit photon-gated two-photon PSHB mechanisms [1][2][3][4], which permit nondestructive one-photon readout. In addition, some of these systems have high hole burning efficiency and allow fast single shot hole burning in the nanosecond [1] and even the picosecond [3] time scale.…”
Section: Introductionmentioning
confidence: 99%
“…As a continuation of our studies aimed at the optimization of PSHB materials, , an asymmetrically substituted benzoporphyrin P 2 TriBNP was synthesized, and the relevant spectral, photochemical, and electron−phonon coupling parameters were investigated. Regarding the crucial HB parameters a comparison was made with chlorin because it has been well-studied and used in different applications. ,, The Debye−Waller factor, the dipole moment differences, and the ratio of inhomogeneous to homogeneous line width of P 2 TriBNP are rather similar to those of chlorin or even slightly better.…”
Section: Discussionmentioning
confidence: 99%
“…The main advantage of PSHB materials is the very high frequency selectivity which should be maintained when searching for new compounds. As a continuation of the improvements in PSHB materials, , we concentrate in this paper on the optimization of the hole-burning quantum yield. This parameter is crucial to have in practical applications since it limits the obtainable recording speeds and necessary light levels.…”
Section: Introductionmentioning
confidence: 99%
“…These data, in combination with studies on biologically relevant chromophores in organic or polymeric matrices with hole-burning spectroscopy, are of great utility when comparing protein and non-host environments. Examples include bacteriochlorophyll c in a poly(vinyl butyral) polymer film, 111 chlorin and beta-carotene in a buffer-glycerol mixture, 86 metalloporphyrins in electron-donating (e.g., alkyl halogenides) and electronaccepting (e.g., triethylamine) solvents, 117 and mesoporphyrin in a water-glycerol glass containing trehalose (a carbohydrate that replaces waters associated with the protein surface). 118 Sensing Conformational Changes.…”
Section: Examples Of Biomolecular Nano-environments Probed With Hole-mentioning
confidence: 99%