Browsing by Author "Hayes, Sophia C."
Now showing items 21-40 of 45
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Intermolecular hydrogen bonding in chlorine dioxide photochemistry: A time-resolved resonance Raman study
Philpott, M. P.; Hayes, Sophia C.; Thomsen, C. L.; Reid, P. J. (2001)The geminate-recombination and vibrational-relaxation dynamics of chlorine dioxide (OClO) dissolved in ethanol and 2,2,2-trifluoroethanol (TFE) are investigated using time-resolved resonance Raman spectroscopy. Stokes ...
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Article
Intermolecular hydrogen bonding in chlorine dioxide photochemistry: A time-resolved resonance Raman study
Philpott, M. P.; Hayes, Sophia C.; Thomsen, C. L.; Reid, P. J. (2002)The geminate recombination and vibrational relaxation dynamics of chlorine dioxide (OClO) dissolved in ethanol and 2,2,2-trifluoroethanol (TFE) are investigated using time-resolved resonance Raman spectroscopy. Stokes ...
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Article
Introduction
Banerji, N.; Hayes, Sophia C.; Silva, C. (2014)
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Introduction
Hayes, Sophia C.; Bittner, Eric R.; Banerji, N. (2015)
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Investigating the phase-dependent photochemical reaction dynamics of chlorine dioxide using resonance Raman spectroscopy
Hayes, Sophia C.; Wallace, P. M.; Bolinger, J. C.; Reid, P. J. (2002)Recent progress in understanding the phase-dependent reactivity demonstrated by halooxides is outlined. Specifically, resonance Raman intensity analysis (RRIA) and time-resolved resonance Raman (TRRR) studies of chlorine ...
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Investigating the photochemical dynamics of chlorine dioxide in water and acetonitrile using ultrafast pump-probe spectroscopy
Philpott, M. J.; Hayes, Sophia C.; Reid, P. J. (1998)The photochemical reaction dynamics of chlorine dioxide (OClO) are investigated using femtosecond pump-probe spectroscopy. It is found that the majority of the dynamics can be attributed to the formation and vibrational ...
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Article
Managing Local Order in Conjugated Polymer Blends via Polarity Contrast
Dyson, Matthew J.; Lariou, Eirini; Martin, Jaime; Li, Ruipeng; Erothu, Harikrishna; Wantz, Guillaume; Topham, Paul D.; Dautel, Olivier J.; Hayes, Sophia C.; Stavrinou, Paul N.; Stingelin, Natalie (2019)The optoelectronic landscape of conjugated polymers is intimately related to their molecular arrangement and packing, with minute changes in local order, such as chain conformation and torsional backbone order/disorder, ...
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On the actinic wavelength dependence of OClO photochemistry in solution
Wallace, P. M.; Bolinger, J. C.; Hayes, Sophia C.; Reid, P. J. (2003)The role of actinic wavelength in OClO photochemistry was explored using femtosecond pump-probe spectroscopy. Specifically, the evolution of optical density was monitored at probe wavelengths from 267 to 900 nm following ...
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Oxidation of Tetraphenylhexaazaanthracene: Accessing a Scissor Dimer of a 16π Biscyanine
Zissimou, Georgia A.; Constantinides, Christos P.; Manoli, Maria; Pieridou, Galatia K.; Hayes, Sophia C.; Koutentis, Panayiotis Andreas (2016)Tetraphenylhexaazaanthracene (TPHA), a fluorescent zwitterionic biscyanine with a closed-shell singlet ground state, on treatment with manganese dioxide or phenyliodine bis(trifluoroacetate) (PIFA), undergoes oxidative ...
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The production and decay kinetics of CIOO in water and freon-11: A time-resolved resonance Raman study
Hayes, Sophia C.; Thomsen, C. L.; Reid, P. J. (2001)The production and decay kinetics of ClOO in water and freon-11 were studied using time-resolved resonance Raman (TRRR) spectroscopy. The formation of ClOO following OClO photoexcitation at 390 nm was investigated using ...
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Article
Resonance Raman intensity analysis of ClNO2 dissolved in methanol
Trimithioti, Marilena; Hayes, Sophia C. (2013)Halogens such as chlorine are converted from halides, including ClNO 2, to reactive radicals by UV solar radiation. These radicals can affect ozone production and destruction in the stratosphere. Recently, it became clear ...
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Resonance Raman investigation of β-cyclodextrin-encapsulated π-conjugated polymers
Kasiouli, S.; Di Stasio, F.; McDonnell, S. O.; Constantinides, Christos P.; Anderson, H. L.; Cacialli, F.; Hayes, Sophia C. (2013)Resonance Raman (RR) spectroscopy is used to investigate the effect of β-cyclodextrin encapsulation on the structural and photophysical properties of poly(4,4′-diphenylenevinylene). We especially focus on the thermal ...
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Resonance Raman study of the J-type aggregation process of a water soluble perylene bisimide
Alloa, Elisa; Grande, Vincenzo; Dilmurat, Rishat; Beljonne, David; Würthner, Frank; Hayes, Sophia C. (2019)Perylene bisimides (PBIs) are dyes known for combining high absorption and emission in the visible region with thermal and photochemical stability. H-bond-directed aggregation driven by free imide groups has been reported ...
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Spectroscopic characterization of C-4 substituted 3,5-dichloro-4H-1,2,6-thiadiazines
Theodorou, E.; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Kalogirou, Andreas S.; Constantinides, Christos P.; Manoli, Maria; Koutentis, Panayiotis Andreas; Hayes, Sophia C. (2015)Three 3,5-dichloro-4H-1,2,6-thiadiazines, which differ according to the electron withdrawing nature of their substituent at C-4: (a) 3,5-dichloro-4-methylene-4H-1,2,6-thiadiazine (5a), (b) 3,5-dichloro-4H-1,2,6-thiadiazin-4-one ...
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Spectroscopic characterization of C-4 substituted 3,5-dichloro-4H-1,2,6-thiadiazines1
Theodorou, Eleni; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Kalogirou, Andreas S.; Constantinides, Christos P.; Manoli, Maria; Koutentis, Panayiotis Andreas; Hayes, Sophia C. (2015)
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Synthesis of new photosensitive H2BBQ2+[ZnCl4]2−/[(ZnCl)2(μ-BBH)] complexes, through selective oxidation of H2O to H2O2
Stylianou, Marios; Hadjiadamou, I.; Drouza, Chryssoula; Hayes, Sophia C.; Lariou, E.; Tantis, I.; Lianos, P.; Tsipis, Athanassios C.; Keramidas, Anastasios D. (2017)A new two-electron photosensitizer, H2BBQ2+[ZnCl4]2−/[(ZnCl)2(μ-BBH)] (BBQ stands for 2,5-bis[bis(pyridin-2-ylmethyl)amino]-1,4-quinone and BBH stands for 2,5-bis[bis(pyridin-2-ylmethyl)amino]-1,4-hydroquinone), has been ...
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Article
Tetraphenylhexaazaanthracenes: 16π Weakly Antiaromatic Species with Singlet Ground States
Constantinides, Christos P.; Zissimou, Georgia A.; Berezin, Andrey A.; Ioannou, Theodosia A.; Manoli, Maria; Tsokkou, Demetra; Theodorou, E.; Hayes, Sophia C.; Koutentis, Panayiotis Andreas (2015)Tetraphenylhexaazaanthracene, TPHA-1, is a fluorescent zwitterionic biscyanine with a closed-shell singlet ground state. TPHA-1 overcomes its weak 16π antiaromaticity by partitioning its π system into 6π positive and 10π ...
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Time resolved infrared absorption studies of geminate recombination and vibrational relaxation in OCIO photochemistry
Bolinger, J. C.; Hayes, Sophia C.; Reid, P. J. (2004)The first ultrafast time-resolved infrared absorption studies of the geminate recombination and vibrational relaxation dynamics of aqueous chlorine dioxide (OCIO) were presented. The rapid increase in optical density ...
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Time-resolved resonance Raman studies of halooxide photoisomerization kinetics
Hayes, Sophia C.; Cooksey, C. C.; Reid, P. J. (2003)The condensed-phase photoisomerization dynamics of chlorine dioxide and dichlorine monoxide are investigated using femtosecond pump-probe and time-resolved resonance Raman. These studies demonstrate that photoisomerization ...
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A Time-Resolved Resonance Raman Study of Chlorine Dioxide Photochemistry in Water and Acetonitrile
Hayes, Sophia C.; Philpott, M. P.; Mayer, S. G.; Reid, P. J. (1999)The photochemistry of chlorine dioxide (OClO) in water and acetonitrile is investigated using time-resolved resonance Raman spectroscopy. Stokes and anti-Stokes spectra are measured as a function of time following ...