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Joung JF, Jeong M, Park S. Reliable experimental method for determination of photoacidity revealed by quantum chemical calculations. Phys Chem Chem Phys 2022; 24:21714-21721. [PMID: 36074805 DOI: 10.1039/d2cp03308a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoacids are aromatic acids that exhibit significantly different acidities when they are electronically excited. Three experimental methods have been extensively used to determine the photoacidity, : fluorescence titration, the Förster cycle, and time-resolved experiments. However, the photoacidities determined by these experimental methods are not consistent. In this work, we used a theoretical method to evaluate the reliability of experimentally determined values. In particular, density functional theory (DFT) and time-dependent DFT calculations were used to obtain the changes in Gibbs free energy for acid dissociation reactions which are directly related to values. The Förster cycle, which is frequently used to experimentally determine the photoacidity due to its simplicity, yielded inconsistent results depending on how the transition energy was defined. We evaluated six empirical parameters extracted from the absorption and emission spectra of acidic and basic species of photoacids to adequately define the transition energy in the Förster cycle. And we found that the values obtained using the optical bandgap as the transition energy in the Förster cycle were in the best agreement with the results of quantum chemical calculations.
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Affiliation(s)
- Joonyoung F Joung
- Department of Chemistry and Research Institute for Natural Science, Korea University, Seoul, 02841, Korea.
| | - Minseok Jeong
- Department of Chemistry and Research Institute for Natural Science, Korea University, Seoul, 02841, Korea.
| | - Sungnam Park
- Department of Chemistry and Research Institute for Natural Science, Korea University, Seoul, 02841, Korea.
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2
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Agati G, Brunetti C, Tuccio L, Degano I, Tegli S. Retrieving the in vivo Scopoletin Fluorescence Excitation Band Allows the Non-invasive Investigation of the Plant-Pathogen Early Events in Tobacco Leaves. Front Microbiol 2022; 13:889878. [PMID: 35572685 PMCID: PMC9100583 DOI: 10.3389/fmicb.2022.889878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 03/25/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, we developed and applied a new spectroscopic fluorescence method for the in vivo detection of the early events in the interaction between tobacco (Nicotiana tabacum L.) plants and pathogenic bacteria. The leaf disks were infiltrated with a bacterial suspension in sterile physiological solution (SPS), or with SPS alone as control. The virulent Pseudomonas syringae pv. tabaci strain ATCC 11528, its non-pathogenic ΔhrpA mutant, and the avirulent P. syringae pv. tomato strain DC3000 were used. At different post-infiltration time-points, the in vivo fluorescence spectra on leaf disks were acquired by a fiber bundle-spectrofluorimeter. The excitation spectra of the leaf blue emission at 460 nm, which is mainly due to the accumulation of coumarins following a bacterial infiltration, were processed by using a two-bands Gaussian fitting that enabled us to isolate the scopoletin (SCT) contribution. The pH-dependent fluorescence of SCT and scopolin (SCL), as determined by in vitro data and their intracellular localization, as determined by confocal microscopy, suggested the use of the longer wavelength excitation band at 385 nm of 460 nm emission (F385_460) to follow the metabolic evolution of SCT during the plant-bacteria interaction. It was found to be directly correlated (R 2 = 0.84) to the leaf SCT content, but not to that of SCL, determined by HPLC analysis. The technique applied to the time-course monitoring of the bacteria-plant interaction clearly showed that the amount and the timing of SCT accumulation, estimated by F385_460, was correlated with the resistance to the pathogen. As expected, this host defense response was delayed after P. syringae pv. tabaci ATCC 11528 infiltration, in comparison to P. syringae pv. tomato DC3000. Furthermore, no significant increase of F385_460 (SCT) was observed when using the non-pathogenic ΔhrpA mutant of P. syringae pv. tabaci ATCC 11528, which lacks a functional Type Three Secretion System (TTSS). Our study showed the reliability of the developed fluorimetric method for a rapid and non-invasive monitoring of bacteria-induced first events related to the metabolite-based defense response in tobacco leaves. This technique could allow a fast selection of pathogen-resistant cultivars, as well as the on-site early diagnosis of tobacco plant diseases by using suitable fluorescence sensors.
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Affiliation(s)
- Giovanni Agati
- Istituto di Fisica Applicata “Nello Carrara” (IFAC), Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
- Consortium INSTM-Italian Interuniversity Consortium for Science and Technology of Materials, Firenze, Italy
| | - Cecilia Brunetti
- Istituto per la Protezione Sostenibile delle Piante (IPSP), Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
| | - Lorenza Tuccio
- Istituto di Fisica Applicata “Nello Carrara” (IFAC), Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
- Consortium INSTM-Italian Interuniversity Consortium for Science and Technology of Materials, Firenze, Italy
| | - Ilaria Degano
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Pisa, Italy
| | - Stefania Tegli
- Consortium INSTM-Italian Interuniversity Consortium for Science and Technology of Materials, Firenze, Italy
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, Italy
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3
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Sülzner N, Geissler B, Grandjean A, Jung G, Nuernberger P. Excited‐state Proton Transfer Dynamics of a Super‐Photoacid in Acetone‐Water Mixtures. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200041] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Niklas Sülzner
- Ruhr-Universitat Bochum Lehrstuhl für Theoretische Chemie GERMANY
| | - Bastian Geissler
- Universitat Regensburg Institut für Physikalische und Theoretische Chemie GERMANY
| | | | - Gregor Jung
- Universitat des Saarlandes Biophysikalische Chemie GERMANY
| | - Patrick Nuernberger
- Universitat Regensburg Institut für Physikalische und Theoretische Chemie Universitätsstraße 31 93053 Regensburg GERMANY
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4
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Giri N, Mahapatra S. Optimal control of photodissociation of phenol using genetic algorithm. J Chem Phys 2022; 156:094305. [DOI: 10.1063/5.0081282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photodissociation dynamics of the OH bond of phenol is studied with an optimally shaped laser pulse. The theoretical model consists of three electronic states (the ground electronic state, ππ* state, and πσ* state) in two nuclear coordinates (the OH stretching coordinate as a reaction coordinate, r, and the CCOH dihedral angle as a coupling coordinate, θ). The optimal UV laser pulse is designed using the genetic algorithm, which optimizes the total dissociative flux of the wave packet. The latter is calculated in the adiabatic asymptotes of the S0 and S1 electronic states of phenol. The initial state corresponds to the vibrational levels of the electronic ground state and is defined as | n r, n θ⟩, where n r and n θ represent the number of nodes along r and θ, respectively. The optimal UV field excites the system to the optically dark πσ* state predominantly over the optically bright ππ* state with the intensity borrowing effect for the |0, 0⟩ and |0, 1⟩ initial states. For the |0, 0⟩ initial condition, the photodissociation to the S1 asymptotic channel is favored slightly over the S0 asymptotic channel. Addition of one quantum of energy along the coupling coordinate increases the dissociation probability in the S1 channel. This is because the wave packet spreads along the coupling coordinate on the πσ* state and follows the adiabatic path. Hence, the S1 asymptotic channel gets more ([Formula: see text]11%) dissociative flux as compared to the S0 asymptotic channel for the |0, 1⟩ initial condition. The |1, 0⟩ and |1, 1⟩ states are initially excited to both the ππ* and πσ* states in the presence of the optimal UV pulse. For these initial conditions, the S1 channel gets more dissociative flux as compared to the S0 channel. This is because the high energy components of the wave packet readily reach the S1 channel. The central frequency of the optimal UV pulse for the |0, 0⟩ and |0, 1⟩ initial states has a higher value as compared to the |1, 0⟩ and |1, 1⟩ initial states. This is explained with the help of an excitation mechanism of a given initial state in relation to its energy.
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Affiliation(s)
- Nitai Giri
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - S. Mahapatra
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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5
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Hu R, Lin S, Wang M, Li R, Shuai Z, Wei Y. Catechol Moiety Integrated Tri-Aryl Type AIEgen for Visual and Quantitative Boronic Acid Detection. Chemistry 2021; 28:e202103351. [PMID: 34747077 DOI: 10.1002/chem.202103351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Indexed: 11/10/2022]
Abstract
Novel functional AIEgen based on three compact bound aryl skeletons is designed and synthesized. This tri-aryl type luminogen (TA-Catechol) embedded with catechol moiety responds rapidly to series of boronic acids. Real-time visual and quantitative dual-mode detection method is established for the first time with modest precision and low detection limit (8.0 μM). Detailed mechanistic discussion identifies tetra-coordinated boronic species as the key intermediate within sensing procedure. Wide range of organic boronic acids compatible with this strategy is displayed which is promising in high throughput screening technology. Furthermore, solid-state sensing capability of TA-Catechol is also demonstrated.
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Affiliation(s)
- Renjian Hu
- The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Shiyun Lin
- MOE Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Mengshi Wang
- The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Ruoxin Li
- The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Zhigang Shuai
- MOE Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Yen Wei
- The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.,Department of Chemistry, Center for Nanotechnology and Institute of Biomedical Technology, Chung-Yuan Christian University, Chung-Li, 32023, P. R. China
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6
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Leier J, Michenfelder NC, Unterreiner AN, Olzmann M. Indications for an intermolecular photo-induced excited-state proton transfer of p-nitrophenol in water. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1975051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Julia Leier
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
| | - Nadine C. Michenfelder
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
| | - Andreas-Neil Unterreiner
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
| | - Matthias Olzmann
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
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7
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Kaiser C, Halbritter T, Heckel A, Wachtveitl J. Proton-Transfer Dynamics of Photoacidic Merocyanines in Aqueous Solution. Chemistry 2021; 27:9160-9173. [PMID: 33929051 PMCID: PMC8361770 DOI: 10.1002/chem.202100168] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Indexed: 01/22/2023]
Abstract
Photoacids attract increasing scientific attention, as they are valuable tools to spatiotemporally control proton-release reactions and pH values of solutions. We present the first time-resolved spectroscopic study of the excited state and proton-release dynamics of prominent merocyanine representatives. Femtosecond transient absorption measurements of a pyridine merocyanine with two distinct protonation sites revealed dissimilar proton-release mechanisms: one site acts as a photoacid generator as its pKa value is modulated in the ground state after photoisomerization, while the other functions as an excited state photoacid which releases its proton within 1.1 ps. With a pKa drop of 8.7 units to -5.5 upon excitation, the latter phenolic site is regarded a super-photoacid. The 6-nitro derivative exhibits only a phenolic site with similar, yet slightly less photoacidic characteristics and both compounds transfer their proton to methanol and ethanol. In contrast, for the related 6,8-dinitro compound an intramolecular proton transfer to the ortho-nitro group is suggested that is involved in a rapid relaxation into the ground state.
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Affiliation(s)
- Christoph Kaiser
- Institute for Physical and Theoretical ChemistryGoethe University Frankfurt/MainMax-von-Laue-Str. 760438Frankfurt/MainGermany
| | - Thomas Halbritter
- Current address: Department of Chemistry, Science InstituteUniversity of IcelandDunhaga 3Reykjavikpostcode is missingIceland
- Institute for Organic Chemistry and Chemical BiologyGoethe University Frankfurt/MainMax-von-Laue-Str. 760438Frankfurt/MainGermany
| | - Alexander Heckel
- Institute for Organic Chemistry and Chemical BiologyGoethe University Frankfurt/MainMax-von-Laue-Str. 760438Frankfurt/MainGermany
| | - Josef Wachtveitl
- Institute for Physical and Theoretical ChemistryGoethe University Frankfurt/MainMax-von-Laue-Str. 760438Frankfurt/MainGermany
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8
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9
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Mena LD, Vera DMA, Baumgartner MT, Jimenez LB. Adiabatic deprotonation as an important competing pathway to ESIPT in photoacidic 2-phenylphenols. Phys Chem Chem Phys 2019; 21:12231-12240. [PMID: 31134981 DOI: 10.1039/c9cp02028d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ESIPT (Excited State Intramolecular Proton Transfer) to C atom in 2-phenylphenol is known to be an intrinsically inefficient process. However, to the best of our knowledge, a structure-ESIPT efficiency relationship has not been elucidated yet. Here, we show that there exists a competitive interplay between photoacidity and ESIPT efficiency for the 2-phenylphenol system. The attachment of electron withdrawing groups to the phenol moiety promotes adiabatic deprotonation in the excited state and diminishes the charge transfer character of the excitations, and both these factors contribute in decreasing the ESIPT reaction yield. On the other hand, unfavorable conformational distribution in the ground state also appears as another important aspect responsible for the low ESIPT extent of 2-phenylphenol. A new derivative bearing electron donating, bulky substituents at ortho and para positions of the phenol ring shows an outstanding ESIPT performance, which demonstrates that the efficiency of the process can be significantly enhanced by modifying the substitution pattern. We anticipate that our results will help to guide the molecular designing of new compounds with high ESIPT efficiency.
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Affiliation(s)
- Leandro D Mena
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba Ciudad Universitaria, Córdoba, Argentina.
| | - D M A Vera
- QUIAMM-INBIOTEC-Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Maria T Baumgartner
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba Ciudad Universitaria, Córdoba, Argentina.
| | - Liliana B Jimenez
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba Ciudad Universitaria, Córdoba, Argentina.
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10
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Mohapatra M, Mishra AK. Excited state proton transfer based fluorescent molecular probes and their application in studying lipid bilayer membranes. Photochem Photobiol Sci 2019; 18:2830-2848. [DOI: 10.1039/c9pp00294d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The distribution and prototropic equilibria of 1-naphthol (NpOH) in lipid bilayer membrane.
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Affiliation(s)
| | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036
- India
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11
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McKay G, Korak JA, Rosario-Ortiz FL. Temperature Dependence of Dissolved Organic Matter Fluorescence. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:9022-9032. [PMID: 30028602 DOI: 10.1021/acs.est.8b00643] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The temperature dependence of organic matter fluorescence apparent quantum yields (Φf) was measured for a diverse set of organic matter isolates (i.e., marine aquatic, microbial aquatic, terrestrial aquatic, and soil) in aqueous solution and for whole water samples to determine apparent activation energies ( Ea) for radiationless decay processes of the excited singlet state. Ea was calculated from temperature dependent Φf data obtained by steady-state methods using a simplified photophysical model and the Arrhenius equation. All aquatic-derived isolates, all whole water samples, and one soil-derived fulvic acid isolate exhibited temperature dependent Φf values, with Ea ranging from 5.4 to 8.4 kJ mol-1 at an excitation wavelength of 350 nm. Conversely, soil humic acid isolates exhibited little or no temperature dependence in Φf. Ea varied with excitation wavelength in most cases, typically exhibiting a decrease between 350 and 500 nm. The narrow range of Ea values observed for these samples when compared to literature Ea values for model fluorophores (∼5-30 kJ mol-1) points to a similar photophysical mechanism for singlet excited states nonradiative inactivation across organic matter isolates of diverse source and character. In addition, this approach to temperature dependent fluorescence analysis provides a fundamental, physical basis, in contrast to existing empirical relationships, for correcting online fluorescence sensors for temperature effects.
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Affiliation(s)
- Garrett McKay
- Department of Civil, Environmental, and Architectural Engineering , University of Colorado , Boulder , Colorado 80309 , United States
| | - Julie A Korak
- Department of Civil, Environmental, and Architectural Engineering , University of Colorado , Boulder , Colorado 80309 , United States
| | - Fernando L Rosario-Ortiz
- Department of Civil, Environmental, and Architectural Engineering , University of Colorado , Boulder , Colorado 80309 , United States
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12
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Mukhopadhyay DP, Biswas S, Chakraborty T. LIF Spectroscopy of p-Fluorophenol···Water Complex: Hydrogen Bond Vibrations, Fermi Resonance, and Vibrational Relaxation in the Excited State. J Phys Chem A 2016; 120:9159-9169. [DOI: 10.1021/acs.jpca.6b08988] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Deb Pratim Mukhopadhyay
- Department of Physical Chemistry, Indian Association for the Cultivation of Science 2A Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
| | - Souvick Biswas
- Department of Physical Chemistry, Indian Association for the Cultivation of Science 2A Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
| | - Tapas Chakraborty
- Department of Physical Chemistry, Indian Association for the Cultivation of Science 2A Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
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13
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Verma S, Aute S, Das A, Ghosh HN. Proton-Coupled Electron Transfer in a Hydrogen-Bonded Charge-Transfer Complex. J Phys Chem B 2016; 120:10780-10785. [DOI: 10.1021/acs.jpcb.6b06032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandeep Verma
- Radiation
and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sunil Aute
- CSIR-National Chemical Laboratory, Pune 411008, India
| | - Amitava Das
- CSIR-National Chemical Laboratory, Pune 411008, India
- CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Hirendra N. Ghosh
- Radiation
and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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14
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Szczepanik B. Protolytic dissociation of cyano derivatives of naphthol, biphenyl and phenol in the excited state: A review. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.05.062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Finkler B, Spies C, Vester M, Walte F, Omlor K, Riemann I, Zimmer M, Stracke F, Gerhards M, Jung G. Highly photostable "super"-photoacids for ultrasensitive fluorescence spectroscopy. Photochem Photobiol Sci 2014; 13:548-62. [PMID: 24469857 DOI: 10.1039/c3pp50404b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoacid 8-hydroxypyren-1,3,6-trisulfonic acid (HPTS, pyranine) is a widely used model compound for the examination of excited state proton transfer (ESPT). We synthesized five "super"-photoacids with varying hydrophilicity and acidity on the basis of HPTS. By chemical modification of the three sulfonic acid substituents, the photoacidity is enhanced by up to more than five logarithmic units from pK*≈ 1.4 to ∼-3.9 for the most acidic compound. As a result, nearly quantitative ESPT in DMSO can be observed. The novel photoacids were characterized by steady-state and time-resolved fluorescence techniques showing distinctively red shifted spectra compared to HPTS while maintaining a high quantum yield near 90%. Photostability of the compounds was checked by fluorescence correlation spectroscopy (FCS) and was found to be adequately high for ultrasensitive fluorescence spectroscopy. The described photoacids present a valuable palette for a wide range of applications, especially when the properties of HPTS, i.e. highly charged, low photostability and only moderate excited state acidity, are limiting.
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Affiliation(s)
- Björn Finkler
- Biophysical Chemistry, Saarland University, Campus B2 2, 66123 Saarbrücken, Germany.
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16
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Murase T, Yoshihara T, Yamada K, Tobita S. Fluorescent Peptides Labeled with Environment-Sensitive 7-Aminocoumarins and Their Interactions with Lipid Bilayer Membranes and Living Cells. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20120314] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tokiko Murase
- Department of Chemistry and Chemical Biology, Gunma University
| | | | - Keiichi Yamada
- Department of Chemistry and Chemical Biology, Gunma University
| | - Seiji Tobita
- Department of Chemistry and Chemical Biology, Gunma University
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17
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Zahid M, Grampp G, Mansha A, Bhatti IA, Asim S. Absorption and Fluorescence Emission Attributes of a Fluorescent dye: 2,3,5,6-Tetracyano-p-Hydroquinone. J Fluoresc 2013; 23:829-37. [PMID: 23525972 DOI: 10.1007/s10895-013-1197-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 02/24/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Muhammad Zahid
- Department of Chemistry & Biochemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan.
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18
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Spies C, Finkler B, Acar N, Jung G. Solvatochromism of pyranine-derived photoacids. Phys Chem Chem Phys 2013; 15:19893-905. [DOI: 10.1039/c3cp53082e] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Chan KY, Courtois B, Loose K, Hare PM. Solvent-Dependent Fluorescence Lifetimes of Estrone, 17β-Estradiol and 17α-Ethinylestradiol. Photochem Photobiol 2012; 89:294-9. [DOI: 10.1111/php.12011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 10/15/2012] [Indexed: 02/03/2023]
Affiliation(s)
- Kara Y. Chan
- Department of Chemistry; Northern Kentucky University; Highland Heights; KY
| | - Benoît Courtois
- Ecole Nationale Supérieure d'Ingénieurs de Caen; Caen Cedex; France
| | - Krista Loose
- Department of Chemistry; Northern Kentucky University; Highland Heights; KY
| | - Patrick M. Hare
- Department of Chemistry; Northern Kentucky University; Highland Heights; KY
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20
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Yoshihara T, Yamaguchi Y, Hosaka M, Takeuchi T, Tobita S. Ratiometric Molecular Sensor for Monitoring Oxygen Levels in Living Cells. Angew Chem Int Ed Engl 2012; 51:4148-51. [DOI: 10.1002/anie.201107557] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 12/29/2011] [Indexed: 12/16/2022]
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21
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Yoshihara T, Yamaguchi Y, Hosaka M, Takeuchi T, Tobita S. Ratiometric Molecular Sensor for Monitoring Oxygen Levels in Living Cells. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107557] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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22
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Chan KY, Gavaghan BM, Stoeckel AW, Irizarry K, Hare PM. Solvent effects on the steady state photophysics of estrone and 17β-estradiol. Photochem Photobiol 2012; 88:295-303. [PMID: 22191459 DOI: 10.1111/j.1751-1097.2011.01066.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Absorption and emission yields for estrone and 17β-estradiol were measured in a variety of room temperature solvents. Molar extinction coefficients were found to not vary as a function of solvent, while fluorescence yields were found to be significantly affected by the polarity and hydrogen-bond accepting ability of the solvent, with the yield for 17β-estradiol being highest in nonpolar, hydrogen-bond donating solvents, and lowest in the nonpolar, hydrogen-bond accepting solvent ethyl acetate. Estrone's emission yield was found to be a factor of ten smaller than 17β-estradiol's. Strong solvent and excitation wavelength dependences were found for the relative amounts of emission between estrone's two emission bands, with increased relative emission occurring in nonpolar aprotic solvents, and under higher excitation energies. These results are interpreted with the aid of vertical excitation energies from time-dependent density functional calculations using both explicit and implicit solvation models.
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Affiliation(s)
- Kara Y Chan
- Department of Chemistry, Northern Kentucky University, Highland Heights, KY, USA
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Miskolczy Z, Biczók L. Photochromism in cucurbit[8]uril cavity: inhibition of hydrolysis and modification of the rate of merocyanine-spiropyran transformations. J Phys Chem B 2011; 115:12577-83. [PMID: 21932794 DOI: 10.1021/jp207708x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The effect of inclusion complex formation on the photochromic behavior of a spirobenzopyran dye and its merocyanine isomer was studied in aqueous solution using cucurbit[8]uril (CB8) as a host. The merocyanine (MC) and protonated merocyanine (MCH(+)) were the most stable forms both in water and inside the cavity of CB8. The equilibrium constant of 1:1 complexation with CB8 was found to be 1.7 × 10(5) and 2.0 × 10(6) M(-1) for the former and latter species, respectively. The encapsulation led to significant change in the rate of the photoinduced and thermal photochromic transformations and hindered the hydrolysis of MC. The effect of CB8 on the reaction kinetics strongly altered with pH. The transition from the spiropyran form to trans-MC in a thermal reaction had 33 kJ mol(-1) lower activation energy and more than 5 orders of magnitude smaller Arrhenius pre-exponential factor in CB8 than in water.
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Affiliation(s)
- Zsombor Miskolczy
- Chemical Research Center, Hungarian Academy of Sciences, Budapest, Hungary
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24
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Song CI, Rhee YM. Dynamics on the Electronically Excited State Surface of the Bioluminescent Firefly Luciferase–Oxyluciferin System. J Am Chem Soc 2011; 133:12040-9. [DOI: 10.1021/ja201752p] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chang-ik Song
- Institute of Theoretical and Computational Chemistry and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 790-784 Korea
| | - Young Min Rhee
- Institute of Theoretical and Computational Chemistry and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 790-784 Korea
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25
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Corden VA, Duhme-Klair AK, Hostachy S, Perutz RN, Reddig N, Becker HC, Hammarström L. Spectroscopic and Structural Investigations Reveal the Signaling Mechanism of a Luminescent Molybdate Sensor. Inorg Chem 2011; 50:1105-15. [DOI: 10.1021/ic1019422] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Sarah Hostachy
- Department of Chemistry, University of York, York YO10 5DD, U.K
| | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, U.K
| | - Nicole Reddig
- Department of Chemistry, University of York, York YO10 5DD, U.K
| | - Hans-Christian Becker
- Department of Photochemistry and Molecular Science, Uppsala University, P.O. Box 523, S-75120 Uppsala, Sweden
| | - Leif Hammarström
- Department of Photochemistry and Molecular Science, Uppsala University, P.O. Box 523, S-75120 Uppsala, Sweden
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Richard C, Krajnik P, Grabner G. Photolysis of 4-chlororesorcinol in water: competitive formation of a singlet ketene and a triplet carbene. Phys Chem Chem Phys 2010; 12:14322-9. [PMID: 20859579 DOI: 10.1039/c0cp00756k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Research on photoinduced reactions of halogenated phenols is of interest for environmental photochemistry and for synthetic organic chemistry. Previous studies have uncovered interesting mechanistic features, including ring contraction from benzene to cyclopentadiene from ortho derivatives and two-electron processes forming carbocations and carbenes from para derivatives. In the present work, we studied the aqueous photochemistry of 4-chlororesorcinol (1), which combines the conformational properties of both types of derivatives, using nanosecond transient absorption spectroscopy and photoproduct analysis. The absorption spectra obtained upon pulsed laser excitation of 1 showed the occurrence of both o-Cl and p-Cl elimination, the first observed transients being the ketene 3-hydroxy-6-fulvenone (2, λ(max) = 255 nm) and the carbene 2-hydroxy-4-oxo-2,5-cyclohexadienylidene (3, λ(max) = 405 and 395 nm). The reactivities of 2 and 3, the spectra of the secondary transients and the analysis of the final products showed that the two HCl elimination pathways take place concurrently. Most probably, the bifurcation step is the competition between intersystem crossing on the molecular level and o-Cl elimination on the singlet surface; p-Cl elimination proceeds on the triplet surface. Remarkably, the quantum yield of p-Cl elimination from 1 is lower by one order of magnitude compared to that found in para-halogenated phenols, while that of o-Cl elimination from 1 is comparable to ortho-halogenated phenol. To explain this result, we propose that o-Cl elimination is the major deactivation step, forming an intermediate singlet cation which is able to recombine to ground state 1, thereby limiting the observed photochemical quantum yields.
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Affiliation(s)
- Claire Richard
- Clermont Université, Université Blaise Pascal, Laboratoire de Photochimie Moléculaire et Macromoléculaire (LPMM), BP 10448, 63000 Clermont-Ferrand, France.
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Jiao L, Meng T, Chen Y, Zhang M, Wang X, Hao E. Triazolyl-linked 8-Hydroxyquinoline Dimer as a Selective Turn-on Fluorosensor for Cd2+. CHEM LETT 2010. [DOI: 10.1246/cl.2010.803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Freitas AA, Quina FH, Fernandes AC, Maçanita AAL. Picosecond Dynamics of the Prototropic Reactions of 7-Hydroxyflavylium Photoacids Anchored at an Anionic Micellar Surface. J Phys Chem A 2010; 114:4188-96. [DOI: 10.1021/jp100281u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adilson A. Freitas
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
| | - Frank H. Quina
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
| | - Ana C. Fernandes
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
| | - António A. L. Maçanita
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
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Jager WF, Hammink TS, van den Berg O, Grozema FC. Highly Sensitive Water-Soluble Fluorescent pH Sensors Based on the 7-Amino-1-methylquinolinium Chromophore. J Org Chem 2010; 75:2169-78. [DOI: 10.1021/jo902225k] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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