1
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Pszona M, Gawinkowski S, Jäger R, Kamińska I, Waluk J. Influence of bulky substituents on single-molecule SERS sensitivity. J Chem Phys 2022; 156:014201. [PMID: 34998322 DOI: 10.1063/5.0074840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The surface-enhanced Raman spectroscopy (SERS) detection limit strongly depends on the molecular structure, which we demonstrate for a family of tert-butyl-substituted porphycenes. Even though the investigated species present very similar photophysical properties, the ratio between the SERS signal and fluorescence background depends on the number of bulky tert-butyl groups. Moreover, the probability of single molecule detection systematically drops with the number of the moieties attached to the pyrrole ring. As steric hindrance is the only significantly changing feature among the studied chromophores, we attribute the observed phenomena to the spatial structure. We also show that the sensitivity of the SERS technique can be improved by lowering the temperature. We managed to observe single-molecule spectra for derivatives for which this was unattainable at room temperature.
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Affiliation(s)
- Maria Pszona
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Sylwester Gawinkowski
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Regina Jäger
- Institute of Physical and Theoretical Chemistry and LISA, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Izabela Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
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2
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Bednarz A, Kamińska I, Jamrozik A, Zielonka K, Listkowski A, Waluk J. Substituent screening effect on single-molecule photostability: comparison of three differently substituted porphycenes. Methods Appl Fluoresc 2021; 9. [PMID: 33910172 DOI: 10.1088/2050-6120/abfcac] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/28/2021] [Indexed: 11/12/2022]
Abstract
Photobleaching of single molecules has been studied using confocal fluorescence microscopy for porphycene, a porphyrin isomer, and its two derivatives. Fourfold substitution of porphycene with bulkytert-butyl groups leads to the enhancement of photostability, even though the spectral, photophysical, and redox parameters remain similar. We attribute this effect to the increase of the efficiency of physical quenching of the chromophore triplet state by oxygen, compared with the yield of chemical reaction that leads to photobleaching. Analysis of the observed photon fluxes from single emitters embedded in a polymer film shows that the experiment based on fluorescence is biased towards detection of molecules which have oxygen-the triplet quencher-in their vicinity. The distribution of the measured photodegradation quantum yields is very heterogeneous, suggesting that physical and chemical quenching rates exhibit different distance and orientation dependences.
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Affiliation(s)
- Aleksandra Bednarz
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Izabela Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Agnieszka Jamrozik
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Karolina Zielonka
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland
| | - Arkadiusz Listkowski
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
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3
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Listkowski A, Kharchenko A, Ciąćka P, Kijak M, Masiera N, Rybakiewicz R, Luboradzki R, Fita P, Waluk J. Fluorinated Porphycenes: Synthesis, Spectroscopy, Photophysics, and Tautomerism. Chempluschem 2020; 85:2197-2206. [DOI: 10.1002/cplu.202000517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/08/2020] [Indexed: 11/05/2022]
Affiliation(s)
- Arkadiusz Listkowski
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
- Faculty of Mathematics and Natural Sciences College of Science Cardinal Stefan Wyszyński University Dewajtis 5 01-815 Warsaw Poland
| | - Anastasiia Kharchenko
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Piotr Ciąćka
- Institute of Experimental Physics Faculty of Physics University of Warsaw Pasteura 5 02-093 Warsaw Poland
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Michał Kijak
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Natalia Masiera
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Renata Rybakiewicz
- Faculty of Mathematics and Natural Sciences College of Science Cardinal Stefan Wyszyński University Dewajtis 5 01-815 Warsaw Poland
| | - Roman Luboradzki
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
| | - Piotr Fita
- Institute of Experimental Physics Faculty of Physics University of Warsaw Pasteura 5 02-093 Warsaw Poland
| | - Jacek Waluk
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44 01-224 Warsaw Poland
- Faculty of Mathematics and Natural Sciences College of Science Cardinal Stefan Wyszyński University Dewajtis 5 01-815 Warsaw Poland
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4
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Kijak M, Nawara K, Listkowski A, Masiera N, Buczyńska J, Urbańska N, Orzanowska G, Pietraszkiewicz M, Waluk J. 2 + 2 Can Make Nearly a Thousand! Comparison of Di- and Tetra- Meso-Alkyl-Substituted Porphycenes. J Phys Chem A 2020; 124:4594-4604. [PMID: 32423205 PMCID: PMC7590974 DOI: 10.1021/acs.jpca.0c02155] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two porphycenes, substituted at the meso positions with two and four methyl groups, respectively, reveal similar absorption spectra, but their photophysical properties are completely different. 9,20-dimethylporphycene emits fluorescence with about 20% quantum yield, independent of the solvent. In contrast, fluorescence of 9,10,19,20-tetramethylporphycene is extremely weak in nonviscous solvents, but it can be recovered by placing the chromophore in a rigid environment. We propose a model that explains these differences, based on calculations and structural analogies with other extremely weakly emitting derivatives, dibenzo[cde,mno]porphycenes. The efficient S1 deactivation involves delocalization of two inner cavity protons coupled with proton translocation toward a high-energy cis tautomer. The latter process leads to distortion from planarity. The probability of deactivation increases with the strength of the intramolecular NH···N hydrogen bonds. The model also explains the observation of biexponential fluorescence decay in weakly emitting porphycenes. It can be extended to other derivatives, in particular, the asymmetrically substituted ones. We also point to the possibility of using specific porphycenes as viscosity sensors, in particular, when working in single molecule regime.
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Affiliation(s)
- Michał Kijak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Krzysztof Nawara
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Arkadiusz Listkowski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Natalia Masiera
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Joanna Buczyńska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Natalia Urbańska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Grażyna Orzanowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Marek Pietraszkiewicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
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5
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Photoeradication of bacteria with porphycenes: Substituent effects on the efficiency. Eur J Med Chem 2020; 200:112472. [PMID: 32505852 DOI: 10.1016/j.ejmech.2020.112472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/14/2020] [Accepted: 05/14/2020] [Indexed: 11/23/2022]
Abstract
Considering the world-wide problem of growing antibiotic resistance of bacteria, photodynamic inactivation (PDI) has a potential to become the treatment approach against some infectious diseases. In our study, four differently substituted porphycenes were compared in terms of their bactericidal activity against E. faecalis. All tested compounds had a similar photophysical characteristics, i.e., there were no significant differences in the location of absorption bands or molar absorption coefficients. Also, singlet oxygen generation quantum yields were very similar. Surprisingly, differently substituted porphycenes caused very diverse PDI effects. Special attention was drawn to the tert-butyl moieties. Our studies demonstrated that the presence of these substituents lowers the bactericidal potential significantly and can completely block the activity when more than one moiety is introduced to the molecule. The porphycenes lacking tert-butyl groups exhibited much higher PDI potential and we assign this effect to different interactions of the differently substituted porphycenes with the bacterial cells. Most likely, the presence of tert-butyls impairs cell penetration by the photosensitizer. These results remind that the favorable photophysical characteristics do not ensure that the compound considered as a potential PDI agent can reach the microbial cells.
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6
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Xu N, Ono T, Hisaeda Y. Symmetry Reduction of Porphycenes with Finely Tuned Optical and Electronic Properties through Oxidative Cyclization of
E
/
Z
‐Mixed Dipyrroethenes. Chemistry 2019; 25:11680-11687. [DOI: 10.1002/chem.201902080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Indexed: 01/12/2023]
Affiliation(s)
- Ning Xu
- Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Toshikazu Ono
- Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- Center for Molecular Systems (CMS) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- Center for Molecular Systems (CMS) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
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7
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Okawara T, Kawano R, Morita H, Finkelstein A, Toyofuku R, Matsumoto K, Takehara K, Nagamura T, Iwasa S, Kumar S. Synthesis, Crystal Structure, and Photoluminescent Properties of 3,3',4,4'-Tetraethyl-5,5'-divinyl-2,2'-bipyrrole Derivatives. Molecules 2017; 22:molecules22111816. [PMID: 29072593 PMCID: PMC6150395 DOI: 10.3390/molecules22111816] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/12/2017] [Accepted: 10/23/2017] [Indexed: 11/16/2022] Open
Abstract
Photoluminescent divinylbipyrroles were synthesized from 3,3′,4,4′-tetraetyl-2,2′-bipyrrole-5,5′-dicarboxaldehyde and activated methylene compounds via aldol condensation. For mechanistic clarity, molecular structures of Meldrum’s acid- and 1,3-dimethylbarbituric acid-derived divinylbipyrroles were determined by single-crystal X-ray diffraction. Photoluminescent properties of the synthesized divinylbipyrroles in dichloromethane were found to be dependent on the presence of electron withdrawing groups at the vinylic terminal. The divinylbipyrroles derived from malononitrile, Meldrum’s acid, and 1,3-dimethylbarbituric acid showed fluorescent peaks at 553, 576, and 602 nm respectively. Computational studies indicated that the alkyl substituents on the bipyrrole 3 and 3′ positions increased energy level of the highest occupied molecular orbital (HOMO) compared to the unsubstituted derivatives and provided rationale for the bathochromic shift of the ultraviolet-visible (UV-Vis) spectra compared to the previously reported analogs.
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Affiliation(s)
- Toru Okawara
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Reo Kawano
- Advanced School of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Hiroya Morita
- Advanced School of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Alan Finkelstein
- Department of Chemistry and Biochemistry, Queens College, Queens, NY 11367, USA.
| | - Renjiro Toyofuku
- Department of Materials Science and Chemical Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Kanako Matsumoto
- Department of Materials Science and Chemical Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Kenji Takehara
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Toshihiko Nagamura
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shi-i, Kokuraminami-ku, Kitakyushu 802-0985, Japan.
| | - Seiji Iwasa
- Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Tempaku-cho, Toyohashi, Aichi 441-8580, Japan.
| | - Sanjai Kumar
- Department of Chemistry and Biochemistry, Queens College, Queens, NY 11367, USA.
- Ph.D. Program in Chemistry and Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA.
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8
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Pati NN, Kumar BS, Panda PK. β-Hexaalkylporphycenes: Positional Effect of Alkyl Groups toward Design and Control of Structural and Photophysical Properties in Isomeric Hexaethylporphycenes. Org Lett 2017; 19:134-137. [PMID: 28009516 DOI: 10.1021/acs.orglett.6b03428] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two novel β-hexaalkylated porphycenes, i.e., 2,3,7,12,13,17- (HOT) and 2,3,6,12,13,16-hexaethylporphycenes (HIT) were introduced for the first time in porphycene chemistry. These were synthesized through McMurry coupling reactions of new isomeric unsymmetrically substituted triethylbipyrrole dialdehydes. The positional effects of alkyl groups could be manifested through significant alteration in structure of porphycene cores and, as a consequence their photophysical properties, not noticed in β-octaethylporphycene. HOT displays significant fluorescence accompanied by reasonable singlet oxygen generation ability.
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Affiliation(s)
- Narendra N Pati
- School of Chemistry, University of Hyderabad , Hyderabad 500046, India
| | - B Sathish Kumar
- School of Chemistry, University of Hyderabad , Hyderabad 500046, India
| | - Pradeepta K Panda
- School of Chemistry, University of Hyderabad , Hyderabad 500046, India
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9
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Affiliation(s)
- Gonzalo Anguera
- Grup d’Enginyeria
de Materials, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
| | - David Sánchez-García
- Grup d’Enginyeria
de Materials, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
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10
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Abstract
The use of cyclic polyene perimeter-model approaches, such as Gouterman's four-orbital model and Michl's perimeter model, to analyze trends in the electronic structures and optical properties of expanded, contracted, and isomeric porphyrins is described with an emphasis on the use of magnetic circular dichroism (MCD) spectroscopy to validate the results of TD-DFT calculations. Trends in the electronic structures and optical properties of isomeric porphyrins are examined by comparing the properties of porphycenes, corrphycenes, hemiporphycenes, isoporphycenes, N-confused and neoconfused porphyrins, and norroles, whereas those of ring-contracted porphyrins are examined by comparing the properties of subporphyrins, triphyrins, and vacataporphyrins. The ring-expanded compounds that are examined include cyclo[n]pyrroles, [22]pentaphyrins(1.1.1.1.1), sapphyrins, smaragdyrins, isosmaragdyrins, orangarins, ozaphyrins, [26]hexaphyrins(1.1.1.1.1.1), rubyrins, rosarins, amethyrins, isoamethyrins, bronzaphyrins, and doubly N-confused hexaphyrins.
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Affiliation(s)
- John Mack
- Department of Chemistry, Rhodes University , Grahamstown 6140, South Africa
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11
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Abstract
Tautomerization in porphycenes, constitutional isomers of porphyrins, is strongly entangled with spectral and photophysical parameters. The intramolecular double hydrogen transfer occurring in the ground and electronically excited states leads to uncommon spectroscopic characteristics, such as depolarized emission, viscosity-dependent radiationless depopulation, and vibrational-mode-specific tunneling splittings. This review starts with documentation of the electronic spectra of porphycenes: Absorption and magnetic circular dichroism are discussed, together with their analysis based on the perimeter model. Next, photophysical characteristics are presented, setting the stage for the final part, which discusses the developments in research on tautomerism. Porphycenes have been studied in different experimental regimes: molecules in condensed phases, isolated in supersonic jets and helium nanodroplets, and, recently also on the level of single molecules investigated by optical and scanning probe microscopies. Because of the rich and detailed information obtained from these diverse investigations, porphycenes emerge as very good models for studying the complex, multidimensional phenomena involved in the process of intramolecular double hydrogen transfer.
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Affiliation(s)
- Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences , 01-224 Warsaw, Kasprzaka 44/52, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University , Dewajtis 5, 01-815 Warsaw, Poland
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12
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Oohora K, Ogawa A, Fukuda T, Onoda A, Hasegawa JY, Hayashi T. meso-Dibenzoporphycene has a Large Bathochromic Shift and a Porphycene Framework with an UnusualcisTautomeric Form. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501496] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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meso-Dibenzoporphycene has a Large Bathochromic Shift and a Porphycene Framework with an UnusualcisTautomeric Form. Angew Chem Int Ed Engl 2015; 54:6227-30. [DOI: 10.1002/anie.201501496] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Indexed: 11/07/2022]
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14
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Okawara T, Abe M, Hisaeda Y. Synthesis of a series of multiply meso-acetoxylated porphycenes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Ciąćka P, Fita P, Listkowski A, Kijak M, Nonell S, Kuzuhara D, Yamada H, Radzewicz C, Waluk J. Tautomerism in Porphycenes: Analysis of Rate-Affecting Factors. J Phys Chem B 2014; 119:2292-301. [DOI: 10.1021/jp506150r] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Piotr Ciąćka
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
| | - Piotr Fita
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
| | - Arkadiusz Listkowski
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Michał Kijak
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Santi Nonell
- Molecular
Engineering Group, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, E-08017 Barcelona, Spain
| | - Daiki Kuzuhara
- Graduate
School of Material Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma 630-0192, Japan
| | - Hiroko Yamada
- Graduate
School of Material Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma 630-0192, Japan
| | - Czesław Radzewicz
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jacek Waluk
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Faculty
of Mathematics and Natural Sciences, College of Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
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16
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Okabe T, Kuzuhara D, Suzuki M, Aratani N, Yamada H. Synthesis and Electrochemical Properties of Porphycene–Diketopyrrolopyrrole Conjugates. Org Lett 2014; 16:3508-11. [DOI: 10.1021/ol5014608] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takuya Okabe
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama-cho, Ikoma 630-0192, Japan
| | - Daiki Kuzuhara
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama-cho, Ikoma 630-0192, Japan
| | - Mitsuharu Suzuki
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama-cho, Ikoma 630-0192, Japan
| | - Naoki Aratani
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama-cho, Ikoma 630-0192, Japan
| | - Hiroko Yamada
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama-cho, Ikoma 630-0192, Japan
- CREST, JST, Saitama 102-0076, Japan
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17
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Masiera N, Buczyńska J, Orzanowska G, Piwoński H, Waluk J. Enhancing fluorescence by using pluronic block copolymers as carriers of monomeric porphycenes. Methods Appl Fluoresc 2014; 2:024003. [DOI: 10.1088/2050-6120/2/2/024003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Taneda M, Tanaka A, Shimakoshi H, Ikegami A, Hashimoto K, Abe M, Hisaeda Y. Synthesis and characterizations of meso-disubstituted asymmetric porphycenes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.08.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Fita P, Ciacka P, Czerski I, Pietraszkiewicz M, Radzewicz C, Waluk J. Double Hydrogen Transfer in Low Symmetry Porphycenes. ACTA ACUST UNITED AC 2013. [DOI: 10.1524/zpch.2013.0372] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The rate constants of intramolecular double hydrogen transfer have been determined for of tert-butyl-substituted porphycenes: 2-tert-butyl-, 2,7-di-tert-butyl-, 2,7,12-tri-tert-butyl-, and 2,7,12,17-tetra-tert-butylporphycene using femtosecond pump-probe polarization spectroscopy. The rates increase monotonically with the number of substituents. As is the case for other porphycenes studied so far, the tautomerization becomes slower after excitation to the lowest excited singlet state. The potential for the trans-trans self-exchange reaction is symmetrical in di- and tetra-tert-butyl substituted derivatives, but not for the singly and triply substituted ones. Our studies enabled determination of the relative populations of nonequivalent tautomers and thus of the equilibrium constants in S0 and S1 states, as well as estimation of ground and excited state activation energies for the tautomerization process.
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Affiliation(s)
- Piotr Fita
- University of Warsaw, Faculty of Physics, Warsaw, Polen
| | - Piotr Ciacka
- University of Warsaw, Faculty of Physics, Warsaw, Polen
| | - Igor Czerski
- Polish Academy of Sciences, Institute of physical Chemistry, Warsaw, Polen
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