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Kijak M, Peukert S, Mengesha E, Sepioł J, Gil M. Supersonic Jet Spectroscopy and Density Functional Theory Study of Isomeric Diazines: 1,4- and 1,8-Diazatriphenylene. Why Do They Differ So Deeply? J Phys Chem A 2016; 120:7817-7827. [DOI: 10.1021/acs.jpca.6b06475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michał Kijak
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Sebastian Peukert
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Ephriem Mengesha
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Jerzy Sepioł
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Michał Gil
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224 Warsaw, Poland
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2
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Küttner HG, Selzle HL, Schlag EW. The Influence of Weak Magnetic Fields on Radiationless Processes. Isr J Chem 2013. [DOI: 10.1002/ijch.197700043] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Ogunsipe AO, Idowu MA, Ogunbayo TB, Akinbulu IA. Protonation of some non-transition metal phthalocyanines — spectral and photophysicochemical consequences. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424612500988] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The photophysics and photochemistry of phthalocyanine complexes of magnesium (MgPc), aluminum chloride (ClAlPc) and zinc (ZnPc) are studied in N,N′-dimethylformamide (DMF). The values obtained for the photophysical and photochemical parameters are normal for simple metallophthalocyanine (MPc) complexes. Protonation of the azomethine bridges reduced the photoactivities of the complexes considerably; however the excited triplet states of the protonated species are more stable towards ground state oxygen. The interaction of the non-protonated MPcs with ground state oxygen is shown to be diffusion-assisted, with bimolecular rate constant values of the order of 1010 M-1.s-1. MgPc could not be protonated; it was easily demetalated by the protonating acid. The kinetics of the demetalation yielded the rate equation: Rate = 0.1[MgPc][H+]2/3
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Affiliation(s)
| | - Mopelola A. Idowu
- Department of Chemistry, University of Agriculture, Abeokuta, Nigeria
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Gehrtz M, Bräuchle C, Voitländer J. An isotope dependent study of acetone in its lowest excited triplet state. Mol Phys 2006. [DOI: 10.1080/00268978400102651] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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5
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Shimada H, Nakamura A, Yoshihara T, Tobita S. Intramolecular and intermolecular hydrogen-bonding effects on photophysical properties of 2'-aminoacetophenone and its derivatives in solution. Photochem Photobiol Sci 2005; 4:367-75. [PMID: 15803207 DOI: 10.1039/b416284f] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Effects of intra- and intermolecular hydrogen-bonds on the photophysical properties of 2'-aminoacetophenone derivatives (X-C6H4-COCH3) having a substituted amino group (X) with different hydrogen-bonding ability to the carbonyl oxygen (X: NH2(AAP), NHCH3(MAAP), N(CH3)2(DMAAP), NHCOCH3(AAAP), NHCOCF3(TFAAP)) are investigated by means of steady-state and time-resolved fluorescence spectroscopy and time-resolved thermal lensing. Based on the photophysical parameters obtained in aprotic solvents with different polarity and protic solvents with different hydrogen-bonding ability, the characteristic photophysical behavior of the 2'-aminoacetophenone derivatives is discussed in terms of hydrogen-bonding and n,pi*-pi,pi* vibronic coupling. The dominant deactivation process of AAP and MAAP in nonpolar aprotic solvents is the extremely fast internal conversion (k(ic)= 1.0 x 10(11) s(-1) for AAP and 3.9 x 10(10) s(-1) for MAAP in n-hexane). The internal conversion rates of both compounds decrease markedly with increasing solvent polarity, suggesting that vibronic interactions between close-lying S1(pi,pi*) and S2(n,pi*) states lead to the large increase in the non-radiative decay rate of the lowest excited singlet state. It is also suggested that for MAAP, which has a stronger hydrogen-bond as compared to AAP, an intramolecular hydrogen-bonding induced deactivation is involved in the dissipation of the S1 state. For DMAAP, which cannot possess an intramolecular hydrogen-bond, the primary relaxation mechanism of the S1 state in nonpolar aprotic solvents is the intersystem crossing to the triplet state, whereas in protic solvents very efficient internal conversion due to intermolecular hydrogen-bonding is induced. In contrast, the fluorescence spectra of AAAP and TFAAP, which have an amino group with a much stronger hydrogen-bonding ability, give strongly Stokes-shifted fluorescence, indicating that these compounds undergo excited-state intramolecular proton transfer reaction upon electronic excitation.
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Affiliation(s)
- Hirofumi Shimada
- Department of Chemistry, Gunma University, Kiryu, Gunma, 376-8515, Japan
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6
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Photolysis reaction mechanism of dibenzophenoneoxime hexamethylenediurethane, a new type of photobase generator. J Photochem Photobiol A Chem 1999. [DOI: 10.1016/s1010-6030(99)00129-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Becker I, Cheshnovsky O. The decay of triplet pyrazine and pyrazine‐D4 in supersonic jets: Isotope effects. J Chem Phys 1994. [DOI: 10.1063/1.467548] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Sneh O, Cheshnovsky O. The decay of triplet pyrazine and methylpyrazine in supersonic jets. Substitution effects. J Chem Phys 1992. [DOI: 10.1063/1.462361] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Phosphorescent states of aromatic thioketones with large zero-field splittings investigated by optically detected magnetic resonance spectroscopy. Chem Phys 1988. [DOI: 10.1016/0301-0104(88)87175-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Selco JI, Holt PL, Weisman RB. Nonradiative relaxation of pyridine vapor: Transient absorption studies of triplet state formation, decay, quenching, and structure. J Chem Phys 1983. [DOI: 10.1063/1.446220] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Kumar CV, Chattopadhyay SK, Das PK. A LASER FLASH PHOTOLYSIS STUDY OF PYRENE-1-ALDEHYDE. INTERSYSTEM CROSSING EFFICIENCY, PHOTOREACTIVITY AND TRIPLET STATE PROPERTIES IN VARIOUS SOLVENTS. Photochem Photobiol 1983. [DOI: 10.1111/j.1751-1097.1983.tb03855.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Despres A, Lejeune V, Migirdicyan E. Temperature and deuterium effects on the phosphorescence lifetimes of dimethylbenzaldehydes in durene single crystals. Chem Phys 1982. [DOI: 10.1016/0301-0104(82)88006-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Siebrand W, Zgierski MZ. Radiationless decay of vibronically coupled electronic states. III. Strong coupling and its effect on triplet decay in aromatic hydrocarbons. J Chem Phys 1981. [DOI: 10.1063/1.442172] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Pineault R, Morgante C, Struve W. Picosecond triplet state dynamics and photodissociation in 2- and 9-iodoanthracene. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/0047-2670(81)85387-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Photophysical behavior of aromatic carbonyl compounds related to proximity effect: thioxanthone. Chem Phys Lett 1980. [DOI: 10.1016/0009-2614(80)80366-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Wassam W, Lim E. “Proximity effects”: the effect of methylation and vibrational excitation on bi-exponential decay in pyrimidine. Chem Phys 1980. [DOI: 10.1016/0301-0104(80)80060-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Hirata Y, Lim EC. Nonradiative electronic relaxation of gas phase aromatic carbonyl compounds: Benzaldehyde. J Chem Phys 1980. [DOI: 10.1063/1.438967] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Lianos P, Cremel G. ENVIRONMENTAL EFFECTS ON THE ELECTRONIC SPECTRAL PROPERTIES OF 1-PYRENECARBOXALDEHYDE AND THEIR APPLICATION IN PROBING BIOLOGICAL STRUCTURES. Photochem Photobiol 1980. [DOI: 10.1111/j.1751-1097.1980.tb03724.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Scott GW, Talley LD, Anderson RW. Excited state absorption spectra and intersystem crossing kinetics in diazanaphthalenes. J Chem Phys 1980. [DOI: 10.1063/1.439788] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Siebrand W, Zgierski MZ. Radiationless decay of vibronically coupled electronic states. II. Non‐Condon effects of nontotally symmetric accepting modes. J Chem Phys 1980. [DOI: 10.1063/1.439364] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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LIN S, FUJIMURA Y. Effect of Magnetic Field on Molecular Luminescence. ACTA ACUST UNITED AC 1979. [DOI: 10.1016/b978-0-12-227204-2.50008-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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22
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Després A, Lejeune V, Migirdicyan E, Siebrand W. Spectroscopic effects of vibronic coupling between nearby 3nπ* and 3ππ* states of dimethylbenzaldehydes in a durene matrix. Chem Phys 1979. [DOI: 10.1016/0301-0104(79)85102-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Gutschick VP. Concentration quenching in chlorophyll-alpha and relation to functional charge transfer in vivo. J Bioenerg Biomembr 1978; 10:153-7. [PMID: 555463 DOI: 10.1007/bf00743105] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Chlorophyll-alpha in ordinary solvents exhibits concentration quenching. Dimeric chlorophyll is reasonably well confirmed as the quenching species, by a critical reanalysis of available data on concentration dependence and on spectral features, in ordinary solvents, and in several analogous quenching environments. This quenching in the dimer in vitro is somewhat less firmly analyzed as due to a new fast internal conversion. Much peripheral evidence supports transient charge transfer as the cause of internal conversion. The same evidence points to a strong similarity to functional charge transfer in vivo. I suggest that inability to extract P680 may be due to its conversion to a form resembling P700 by addition of water. A number of straightforward experiments are suggested to test these proposals. In particular, it is desirable to test for the existence of a vibronic perturbation (from a higher npi* state) in the dimer, as an alternative to charge transfer for explaining the "observed" internal conversion. Such a vibronic cause would raise interesting problems for phototrap function in vivo.
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25
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Wassam W, Lim E. “Proximity effect” and radiationless transitions in aromatic molecules with non-bonding electrons. J Mol Struct 1978. [DOI: 10.1016/0022-2860(78)87184-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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27
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Chodkowska A, Grabowska A, Herbich J. Hydrogen bond effects on zero field splitting of some 1,4-diazaaromatics with strongly basic lowest triplet states. Chem Phys Lett 1977. [DOI: 10.1016/0009-2614(77)80422-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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29
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Unusual structure and kinetics of singly protonated quinoxaline in fluorescent and phosphorescent states. Chem Phys Lett 1977. [DOI: 10.1016/0009-2614(77)85285-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Burgner R, Ponte Goncalves A. Position-dependent deuterium isotope effects on the radiationless decay of the triplet state of porphyrin free bases. Chem Phys Lett 1977. [DOI: 10.1016/0009-2614(77)85260-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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32
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Kanamaru N, Lim EC. T1(ππ*) →S0 radiationless transitions in aromatic molecules with nonbonding electrons. J Chem Phys 1976. [DOI: 10.1063/1.432858] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Madej SL, Okajima S, Lim EC. ’’Proximity effects’’ in radiationless transitions of aromatic molecules with nonbonding electrons: Substituent and temperature dependences of luminescence in some N‐heterocyclics. J Chem Phys 1976. [DOI: 10.1063/1.433148] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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