Bibliographies thématiques / Excited State Proton Transfer (ESPT)

Littérature scientifique sur le sujet « Excited State Proton Transfer (ESPT) »

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Publié le 7 septembre 2023

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Articles de revues sur le sujet "Excited State Proton Transfer (ESPT)"

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Wu, Chia-Hua, Lucas José Karas, Henrik Ottosson et Judy I.-Chia Wu. « Excited-state proton transfer relieves antiaromaticity in molecules ». Proceedings of the National Academy of Sciences 116, no 41 (25 septembre 2019) : 20303–8. http://dx.doi.org/10.1073/pnas.1908516116.

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Baird’s rule explains why and when excited-state proton transfer (ESPT) reactions happen in organic compounds. Bifunctional compounds that are [4n + 2] π-aromatic in the ground state, become [4n + 2] π-antiaromatic in the first 1ππ* states, and proton transfer (either inter- or intramolecularly) helps relieve excited-state antiaromaticity. Computed nucleus-independent chemical shifts (NICS) for several ESPT examples (including excited-state intramolecular proton transfers (ESIPT), biprotonic transfers, dynamic catalyzed transfers, and proton relay transfers) document the important role of excited-state antiaromaticity. o-Salicylic acid undergoes ESPT only in the “antiaromatic” S1 (1ππ*) state, but not in the “aromatic” S2 (1ππ*) state. Stokes’ shifts of structurally related compounds [e.g., derivatives of 2-(2-hydroxyphenyl)benzoxazole and hydrogen-bonded complexes of 2-aminopyridine with protic substrates] vary depending on the antiaromaticity of the photoinduced tautomers. Remarkably, Baird’s rule predicts the effect of light on hydrogen bond strengths; hydrogen bonds that enhance (and reduce) excited-state antiaromaticity in compounds become weakened (and strengthened) upon photoexcitation.
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Jouvet, Christophe, Mitsuhiko Miyazaki et Masaaki Fujii. « Revealing the role of excited state proton transfer (ESPT) in excited state hydrogen transfer (ESHT) : systematic study in phenol–(NH3)n clusters ». Chemical Science 12, no 11 (2021) : 3836–56. http://dx.doi.org/10.1039/d0sc06877b.

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A general model of excited state hydrogen transfer (ESHT) which unifies ESHT and the excited state proton transfer (ESPT) is presented from experimental and theoretical works on phenol–(NH3)n. The hidden role of ESPT is revealed.
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Wei, Qiang, Jiyu Wang, Meiyu Zhao, Meixia Zhang, Yuzhi Song et Peng Song. « A theoretical investigation on excited-state single or double proton transfer process for aloesaponarin I ». Canadian Journal of Chemistry 96, no 1 (janvier 2018) : 83–88. http://dx.doi.org/10.1139/cjc-2017-0533.

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The excited-state proton transfer (ESPT) dynamical behavior of aloesaponarin I (ASI) was studied using density functional theory (DFT) and time-dependent DFT (TDDFT) methods. Our calculated vertical excitation energies based on TDDFT reproduced the experimental absorption and fluorescence spectra well [Nagaoka et al. J. Phys. Chem. B, 117, 4347 (2013)]. Two intramolecular hydrogen bonds were confirmed to be strengthened in the S1 state, which makes ESPT possible. Herein, the ESPT process is more likely to happen, along with one hydrogen bond (O1–H2⋯O3). Qualitative analyses about charge distribution further demonstrate that the ESPT process could occur because of the intramolecular charge transfer. Our constructed potential energy surfaces of both S0 and S1 states show that a single proton transfer reactive is more reasonable along with the intramolecular hydrogen bond (O1–H2⋯O3) rather than O4–H5⋯O6 in the S1 stated potential energy surface. Then, ASI-SPT* decays to the ground state with a 640 nm fluorescence; subsequently, the ASI-SPT form shows that reverse ground state single-proton transfer back to the ASI structure occurs. Particularly, dependent on relatively accurate potential energy barriers among these excited-state stable structures, we confirmed the excited-state single proton transfer process rather than using the controversial nodal plane model.
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Pina, João, Mohamed Alnady, Anika Eckert, Ullrich Scherf et J. Sérgio Seixas de Melo. « Alternating donor–acceptor indigo-cyclopentadithiophene copolymers : competition between excited state conformational relaxation, energy transfer and excited state proton transfer ». Materials Chemistry Frontiers 2, no 2 (2018) : 281–90. http://dx.doi.org/10.1039/c7qm00439g.

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Novitasari, Dian, Hironari Kamikubo, Yoichi Yamazaki, Mariko Yamaguchi et Mikio Kataoka. « Excited-State Proton Transfer in Fluorescent Photoactive Yellow Protein Containing 7-Hydroxycoumarin ». Advanced Materials Research 896 (février 2014) : 85–88. http://dx.doi.org/10.4028/www.scientific.net/amr.896.85.

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Green fluorescent protein (GFP) has been used as an effective tool in various biological fields. The large Stokes shift resulting from an excited-state proton transfer (ESPT) is the basis for the application of GFP in such techniques as ratiometric GFP biosensors. The chromophore of GFP is known to be involved in a hydrogen-bonding network. Previous X-ray crystallographic and FTIR studies suggest that a proton wire along the hydrogen-bonding network plays a role in the ESPT. In order to examine the relationship between the ESPT and hydrogen-bonding network within proteins, we prepared an artificial fluorescent protein using a light-sensor protein, photoactive yellow protein (PYP). The native chromophore of p-coumaric acid (pCA) of PYP undergoes trans-cis isomerization after absorbing a photon, which triggers proton transfers within the hydrogen-bonding network comprised of pCA and proximal amino acid residues. Although PYP emits little fluorescence, we succeeded to reconstitute an artificial fluorescent PYP (PYP-coumarin) by substituting the pCA with its trans-lock analog 7-hydroxycoumarin. Spectroscopic studies with PYP-coumarin revealed that the chromophore takes an anionic form at neutral pH, but is protonated by lowering pH. Both the protonated and deprotonated forms of PYP-coumarin emit intense fluorescence, as compared with the native PYP. In addition, both the deprotonated and protonated forms show identical λmax values in their fluorescence spectra, indicating that ESPT occurs in the artificial fluorescent protein.
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Basarić, Nikola, Nikola Cindro, Yunyan Hou, Ivana Žabčić, Kata Mlinarić-Majerski et Peter Wan. « Competing photodehydration and excited-state intramolecular proton transfer (ESIPT) in adamantyl derivatives of 2-phenylphenols ». Canadian Journal of Chemistry 89, no 2 (février 2011) : 221–34. http://dx.doi.org/10.1139/v10-102.

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2-Phenylphenol derivatives strategically substituted with a hydroxyadamantyl substituent were synthesized and their photochemical reactivity was investigated. Derivatives 9 and 10 undergo competitive excited-state intramolecular proton transfer (ESIPT) from the phenol to the carbon atom of the adjacent phenyl ring and formal ESPT from the phenol to the hydroxyl group coupled with dehydration. These two processes (both via S1) give rise to two classes of quinone methides (QMs) that revert to starting material or react with nucleophiles, respectively. ESIPT to carbon atoms was studied by performing photolyses in the presence of D2O, whereupon deuterium incorporation to the adjacent phenyl ring was observed ([Formula: see text] = 0.1–0.2). The competing formal ESPT and dehydration takes place with quantum yields that are an order of magnitude lower and was studied by isolation of photomethanolysis products. Derivative 8 did not undergo ESIPT to carbon atom. Owing to the presence of an intramolecular H bond, an efficient ESIPT from the phenol to the hydroxyl group coupled with dehydration gives a QM that efficiently undergoes electrocyclization (overall [Formula: see text] = 0.33), to give chroman 16. In addition, spiro[adamantane-2,9′-(4′-hydroxy)fluorene] (12) undergoes ESIPT, unlike the previously reported unreactive parent 2-hydroxyfluorene. The reactive singlet excited states of the prepared biphenyl and fluorene molecules were characterized by fluorescence spectroscopy, whereas laser flash photolysis (LFP) was performed to characterize the longer lived QM intermediates.
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Yang, Dapeng, Jinfeng Zhao, Guang Yang, Nahong Song, Rui Zheng et Yusheng Wang. « Elaborating the excited-state proton transfer behaviors for novel 3H-MC and P2H-CH ». Organic Chemistry Frontiers 4, no 10 (2017) : 1935–42. http://dx.doi.org/10.1039/c7qo00398f.

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Yang, Dapeng, et Ruiquan Qi. « Effects of intermolecular hydrogen bonding on the excited-state proton transfer properties of the cinnamonitrile–methanol complex ». Canadian Journal of Chemistry 91, no 3 (mars 2013) : 229–34. http://dx.doi.org/10.1139/cjc-2012-0368.

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The time-dependent density functional theory (TD-DFT) method was used to study the excited-state proton transfer (ESPT) properties of the hydrogen-bonded cinnamonitrile (3TPAN)–methanol (MeOH) complex (3TPAN–MeOH). The intermolecular hydrogen bonds N1···H11 in both the ground state S0 and the excited state S1 were demonstrated by the optimized geometric structures of the hydrogen-bonded 3TPAN–MeOH complex. While in the excited state S3, a new hydrogen bond H11···O1 was formed after the ESPT took place from the hydrogen-bonded MeOH molecule to the 3TPAN moiety. It was demonstrated that the electronic transitions of the S1 states for both the 3TPAN monomer (including the S3 state) and the hydrogen-bonded 3TPAN–MeOH complex should be of a localized-excited (LE) nature on the 3TPAN molecule, while the S3 state of the hydrogen-bonded 3TPAN–MeOH complex should be of charge transfer (CT) character from the hydrogen-bonded MeOH molecule (through O1···H11) to the 3TPAN moiety. The S3-state proton transfer and charge transfer due to the intermolecular hydrogen-bonding interaction should be the reasons for the remarkable redshift (0.91 eV) of the S3-state electronic energy for the hydrogen-bonded 3TPAN–MeOH complex compared with that of the 3TPAN monomer.
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Joshi, Hem C., et Liudmil Antonov. « Excited-State Intramolecular Proton Transfer : A Short Introductory Review ». Molecules 26, no 5 (9 mars 2021) : 1475. http://dx.doi.org/10.3390/molecules26051475.

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In this short review, we attempt to unfold various aspects of excited-state intramolecular proton transfer (ESIPT) from the studies that are available up to date. Since Weller’s discovery of ESIPT in salicylic acid (SA) and its derivative methyl salicylate (MS), numerous studies have emerged on the topic and it has become an attractive field of research because of its manifold applications. Here, we discuss some critical aspects of ESIPT and tautomerization from the mechanistic viewpoint. We address excitation wavelength dependence, anti-Kasha ESIPT, fast and slow ESIPT, reversibility and irreversibility of ESIPT, hydrogen bonding and geometrical factors, excited-state double proton transfer (ESDPT), concerted and stepwise ESDPT.
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Zhao, Jinfeng, et Peng Li. « The investigation of ESPT for 2,8-diphenyl-3,7-dihydroxy-4H,6H-pyrano[3,2-g]-chromene-4,6-dione : single or double ? » RSC Advances 5, no 90 (2015) : 73619–25. http://dx.doi.org/10.1039/c5ra14601a.

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The dynamic overall perspective of an excited-state proton transfer (ESPT) process for 2,8-diphenyl-3,7-dihydroxy-4H,6H-pyrano[3,2-g]-chromene-4,6-dione (D3HF) is investigated based on a time-dependent density functional theory (TDDFT) method.
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Thèses sur le sujet "Excited State Proton Transfer (ESPT)"

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Weragoda, Geethika K. « Excited state intramolecular proton transfer (ESIPT) and trans-cis isomerization on the triplet excited states ». University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439296134.

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Salvitti, Michael Anthony. « N-methyl-6-hydroxyquinolinium : an investigation into the spectroscopy and applications of excited-state proton transfer / ». Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24665.

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Vérité, Pauline. « Modelling of excited state proton transfer in in fluorescent dyes ». Thesis, Nantes, 2020. http://archive.bu.univ-nantes.fr/pollux/show.action?id=ebc433d0-1c13-4ae5-a308-9fafee57c623.

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Cette thèse est dédiée à l'exploration des surfaces d'énergie potentielle des états électroniques excités de colorants "ESIPT" (Excited-State Intramolecular Proton Transfer) à l'aide d'approches de chimie quantique. Le phénomène ESIPT s’observe typiquement dans des molécules présentant une liaison hydrogène intramoléculaire forte. Le changement de géométrie provoqué par ce transfert permet d’obtenir une grande différence entre l’absorption et l’émission (grand déplacement de Stokes), ouvrant la voie à de multiples applications. Le but de cette thèse est d'identifier les substituants les plus adéquats pour obtenir des signatures d’émission spécifiques, en étroite collaboration avec le groupe expérimental de G. Ulrich à Strasbourg. Pour ce faire, la théorie fonctionnelle de la densité dépendante du temps (TD-DFT) ainsi que des approches post-Hartree-Fock [ADC(2) et CC2] ont été utilisées pour modéliser les propriétés de nombreux colorants. Une attention particulière a été portée aux effets de l’environnement avec l’utilisation d’approches de continuum sous leurs formes de réponse linéaire (LR) et de réponse linéaire corrigée (cLR). Les travaux réalisés lors cette thèse ont permis : i) d’évaluer l'impact des auxochromes (accepteurs et donneurs d'électrons) sur la stabilité des tautomères à l’état excité ; ii) de quantifier les états de transition entre deux ou trois formes tautomériques ; iii) de déterminer les propriétés spectrales des isomères ; et iv) d’identifier les espèces émissives dans le cas d’un système acidochrome complexe
This thesis is dedicated to the exploration of potential energy surfaces of excited electronic states of "ESIPT" (Excited-State Intramolecular Proton Transfer) dyes, using quantum chemistry approaches. The ESIPT phenomenon is typically found in molecules possessing a strong intramolecular hydrogen bond. The change in geometry induced by the ESIPT yields a large difference between the absorption and emission wavelengths (large Stokes’ shift), paving the way to multiple applications. The aim of this thesis is to identify the most suitable auxochromes to obtain specific emissive signatures, in close collaboration with the experimental group of G. Ulrich (Strasbourg). To this end, Time-Dependent Density Functional Theory (TD-DFT) as well as post-Hartree- Fock approaches [ADC(2) and CC2] have been used to model the properties of many dyes. A specific attention was paid to accurately model the environmental effects by using continuum approaches in their linear response (LR) and corrected linear response (cLR) forms. The work carried out during this thesis allowed: i) to evaluate the impact of auxochromes (acceptors and electron donors) on the stability of the tautomers in the excited state; ii) to quantify the transition states between two or three tautomeric forms; iii) to determine the spectral properties of all relevant isomers; and iv) to identify the emissive species in a complex acidochromic system
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Le, Gourrierec Denis. « Excited state intramolecular proton transfer (ESIPT) to nitrogen in heterocyclic compounds ». Thesis, University of Central Lancashire, 1996. http://clok.uclan.ac.uk/21906/.

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Excited state intramolecular proton transfer (ESIPT) reactions have aroused considerable interest in the last 10-15 years. The ESIPT reaction is normally extremely rapid and yields excited species of considerably lower energy than the initial Franck-Condon excited state. ESIPT has therefore been used for the rapid dissipation of energy (e. g. for polymer protection against UV degradation) and to produce fluorophores with large Stokes shifts. Approximately half of the compounds studied to date involve ESIPT to nitrogen but there has been no real attempt at a coherent study of ESIPT to nitrogen. In this work we have tried to remedy this deficiency by studying a range of compounds of increasing complexity in order to characterise ESIPT and subsequent reactions and to evaluate how these properties vary with molecular structure. The molecules selected for this studyf all into two categories: - The azole group includes the 2-(2'-hydroxyphenyl)-oxazole (HPO) and -thiazole (HPT) whose study complements their well known benzo counterparts (HPBT and HPBO) and the related imidazoles. - The compounds of the pyridine group are related to the basic structure of 2-(2'-hydroxyphenyl)-pyridine (HPP). Structural variations involve benzo fusion (quinolines) and addition of a 3,3' bridge. A complementary compound is the well studied 2,2'-bipyridyl-3,3'-diol (BP(OH)2) which undergoes double proton transfer. Whenever possible, the methoxy counterparts were prepared in order to study the photochemistry of these compounds when ESIPT is not possible. The absorption and fluorescence properties of these systems were studied as a function of solvent, temperature and pH conditions. Lifetimes, quantum yields and pKa data were determined under these various conditions and semi-empirical quantum chemical calculations were performed on each system.
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Chen, Weihua. « Chemical Sensors Based on Fluorescence Turn-On Mechanism by Using Excited State Intramolecular Proton Transfer ». University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1334772708.

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Dahal, Dipendra Dahal. « SYNTHESIS AND CHARACTERIZATION OF NOVEL EXCITED STATE INTRAMOLECULAR PROTON TRANSFER (ESIPT) CYANINE DYES WITH NEAR INFRARED (NIR) EMISSION FOR BIOLOGICAL APPLICATIONS ». University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1567644552737644.

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McDonald, Lucas J. « Synthesis and Characterization of Novel Flavonoid-Based Fluorescent Sensors and other Sensors with Excited State Intramolecular Proton Transfer for Biological Applications ». University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1524658238472646.

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Zhang, Wanying. « Comprehensive Study on Fluorescent ESIPT Liquid Crystal Materials and the Potential for Optoelectronic Applications ». Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263621.

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Linares-Samaniego, Sandra I. « Excited state proton transfer in microheterogeneous conditions ». Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/27263.

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Potter, Charles Alan Stuart. « Excited state proton transfer in 2-substituted benzothiazoles ». Thesis, University of Central Lancashire, 1993. http://clok.uclan.ac.uk/19742/.

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The photophysics of 2-(2'-hydroxyphenyl)benzothiazole (HBT) and related compounds has been studied as a function of solvent, pH or H 0 and temperature. Measurements of absorption and fluorescence spectra and fluorescence decay profiles under these various conditions have been combined with theoretical calculations to arrive at an understanding of the excited state behaviour of HBT and derivatives. An investigation has been made into the protonation and deprotonation of 2-phenylbenzothiazole, 2-(2'-methoxyphenyl)benzothiazole), HBT and derivatives of HBT with bromine, chlorine, hydroxy, methoxy, methyl and nitro substituents in the 2-phenyl ring. Absorption and fluorescence spectra have been combined with Forster cycle calculations to yield pKa, pKb, pKa* and pKb* values for the various compounds. The results have been compared with those for the corresponding phenols and many similarities noted. The overlap of the pK a* and pKb* values for HBT and derivatives has been noted. This has explained the occurrence of excited state intramolecular proton transfer (ESIPT) in these compounds. A study of the photophysics of HBT in non-polar and alcoholic mixtures for temperatures in the range 96-298K has been made using the Berlin synchrotron source, BESSY. In all solvents a rise in both fluorescence quantum yield and lifetime is observed as the temperature is decreased. It is proposed that a viscosity dependent non-radiative process leading to a nonemissive, twisted excited state accounts for these observations. Application of quantum chemical calculations to the system appears to confirm this interpretation. The fluorescence kinetics of HBT have been studied as a function of alkaline pH. Combination of the lifetime data with quantum yields and pK a* values have allowed calculation of all the rate constants in the neutral c → anion equilibrium for HBT. Similar measurements have been undertaken for substituted HBTs and for HBT at high acidities, but the data obtained has been less easy to interpret.
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Livres sur le sujet "Excited State Proton Transfer (ESPT)"

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Martin, Peter Simon. A theoretical study of excited state proton transfer to carbon in simple organic unsaturates. 1988.

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Chapitres de livres sur le sujet "Excited State Proton Transfer (ESPT)"

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Mutai, Toshiki. « Luminescent Crystal–Control of Excited-State Intramolecular Proton Transfer (ESIPT) Luminescence Through Polymorphism ». Dans Advances in Organic Crystal Chemistry, 271–98. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5085-0_14.

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Agmon, Noam. « Excited State Proton Transfer Reactions ». Dans Theoretical and Computational Models for Organic Chemistry, 315–34. Dordrecht : Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3584-9_14.

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Tomin, Vladimir I. « Proton Transfer Reactions in the Excited Electronic State ». Dans Hydrogen Bonding and Transfer in the Excited State, 463–523. Chichester, UK : John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470669143.ch22.

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Ernsting, Niko P., et Andrzej Mordzinski. « Excited State Intramolecular Proton Transfer in Supersonic Jets ». Dans Methods of Laser Spectroscopy, 425–28. Boston, MA : Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-9459-8_56.

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Riedle, E., S. Lochbrunner, A. J. Wurzer, V. de Waele et R. de Vivie-Riedle. « Does the proton move during ultrafast excited state intramolecular proton transfer ? » Dans Ultrafast Phenomena XII, 645–47. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56546-5_191.

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Pang, Yi, et Weihua Chen. « Excited-State Intramolecular Proton Transfer in 2-(2′-Hydroxyphenyl)benzoxazole Derivatives ». Dans Hydrogen Bonding and Transfer in the Excited State, 747–60. Chichester, UK : John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470669143.ch32.

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van der Zwan, Gert. « Dynamics of Ground- and Excited-State Intramolecular Proton Transfer Reactions ». Dans Tautomerism, 213–51. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527658824.ch9.

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Huppert, Dan, et Ehud Pines. « Dynamics of Geminate Recombination in Excited State Proton Transfer Reactions ». Dans Methods of Laser Spectroscopy, 113–16. Boston, MA : Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-9459-8_15.

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Elsaesser, Thomas. « Ultrafast Excited State Hydrogen Transfer in the Condensed Phase ». Dans Ultrafast Hydrogen Bonding Dynamics and Proton Transfer Prosesses in the Condensed Phase, 119–53. Dordrecht : Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-0059-7_6.

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Hsieh, Cheng-Chih, Chang-Ming Jiang et Pi-Tai Chou. « Excited-State Proton Transfer via Hydrogen-Bonded Dimers and Complexes in Condensed Phase ». Dans Hydrogen Bonding and Transfer in the Excited State, 555–78. Chichester, UK : John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470669143.ch24.

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Actes de conférences sur le sujet "Excited State Proton Transfer (ESPT)"

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Tran-Thi, T.-H., C. Prayer, T. Gustavsson et S. Pommeret. « Primary Ultrafast Events in the Proton Transfer Reaction from Excited Pyranine to Water ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.fe.21.

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Pyranine or tsPyOH (8-hydroxy-1,3,6-trisulfonated pyrene) belongs to the family of aromatic alcohols which have been widely studied since Förster1 and Weller2. These molecules are known to undergo proton transfer (PT) both in the ground (GSPT) and singlet excited (ESPT) states, with Ka jump of seven orders of magnitude between the two processes. The dynamics of pyranine ESPT has been studied in various polar media 3-5. In all cases, ESPT was probed by observing the disappearance of the protonated species and the formation of the deprotonated form, using time resolved fluorescence techniques with picosecond or nanosecond time resolution. A long decay time (~100 ps) of tsPyOH*, correlated with the formation time of tsPyO-*, was found in aqueous solutions and ascribed to the ESPT time constant6. In contrast to these findings, Mataga's group, who probed ESPT of the related compound hydroxypyrene (PyOH) hydrogen-bonded to a strong base (triethylamine) in various non-polar and polar solvents, found a first, fast time constant (850 fs) followed by a slower one7. The first time constant, which is solvent independent, was ascribed to a fast ESPT, while the second one was assigned to the ion pair separation.
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Syage, Jack A. « Time-resolved studies of chemical reactions in clusters ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thdd3.

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Excited-state proton transfer (ESPT) rates in molecular clusters were measured as a function of cluster size using picosecond spectroscopy in a molecular beam mass spectrometer. ESPT from the S1 state of phenol to basic solvent clusters (NH3)n occurs for a critical solvent cluster size n ≥5 with a rate constant of k= (60 ± 10 ps)-1 for n = 5−7. ESPT showing critical cluster-size dependencies was also observed in the basic solvent N(CH3)3 (n ≃ 3). Proton transfer was not observed in the less basic solvent clusters (CH3OH) n and (H2O) n . Mixed solvent studies indicate that the addition of a dissimilar molecule to an otherwise neat solvent cluster impedes ESPT presumably due to a disruption of the hydrogen bonding network.
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Park, Soo Young, et Sehoon Kim. « Molecular photonics materials with excited-state intramolecular proton transfer (ESIPT) activity ». Dans Integrated Optoelectronics Devices, sous la direction de James G. Grote et Toshikuni Kaino. SPIE, 2003. http://dx.doi.org/10.1117/12.485821.

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Steinbacher, Andreas, Pramod Kumar Verma, Federico Koch, Patrick Nuernberger et Tobias Brixner. « Exploring the Ultrafast Excited-State Intramolecular Proton Transfer (ESIPT) of β-Diketones in the deep-UV ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : OSA, 2016. http://dx.doi.org/10.1364/up.2016.uth4a.13.

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Riedle, Eberhard, Stefan Lochbrunner, Alexander J. Wurzer, Vincent de Waele et Regina de Vivie-Riedle. « Does the proton move during ultrafast excited state intramolecular proton transfer ? » Dans International Conference on Ultrafast Phenomena. Washington, D.C. : OSA, 2000. http://dx.doi.org/10.1364/up.2000.me3.

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Biswas, Chinmoy, Kathirvelan Devarajan, Pritha Dey, Tarun K. Panda, Sivarama Krishnan et Sai Santosh Kumar Raavi. « Femtosecond Excited State Dynamics of Phenanthroimidazole Derivative Molecules Through Excited State Intramolecular Proton Transfer ». Dans Frontiers in Optics. Washington, D.C. : OSA, 2021. http://dx.doi.org/10.1364/fio.2021.jw7a.75.

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Mishra, Hirdyesh. « FLUORESCENCE DYNAMICS OF EXCITED STATE PROTON TRANSFER IN SALICYLIC ACID : REVISITED ». Dans 2020 International Symposium on Molecular Spectroscopy. Urbana, Illinois : University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.tk10.

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Wierzchowski, Jacek, Grzegorz Mędza et David Shugar. « Excited-state proton transfer in the fluorescent purine analogue – 8-azaisoguanine ». Dans XIVth Symposium on Chemistry of Nucleic Acid Components. Prague : Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2008. http://dx.doi.org/10.1135/css200810476.

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Lochbrunner, Stefan, Michael Schmitt, James P. Shaffer, Thomas Schultz et Albert Stolow. « Time-Resolved Photoelectron Spectroscopy of Excited State Intramolecular Proton Transfer Dynamics ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : OSA, 2000. http://dx.doi.org/10.1364/up.2000.tuf37.

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LOCHBRUNNER, S., K. STOCK, V. DE WAELE et E. RIEDLE. « ULTRAFAST EXCITED STATE PROTON TRANSFER : REACTIVE DYNAMICS BY MULTIDIMENSIONAL WAVEPACKET MOTION ». Dans With Foreword by Prof A H Zewail, Nobel Laureate in Chemistry, 1999. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777980_0019.

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Rapports d'organisations sur le sujet "Excited State Proton Transfer (ESPT)"

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Bernstein, E. R., M. F. Hineman, G. A. Brucker et D. F. Delley. Excited State Proton Transfer in 1-Naphthol/Ammonia Clusters. Fort Belvoir, VA : Defense Technical Information Center, février 1992. http://dx.doi.org/10.21236/ada245849.

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Smith, Charles A. Excited state proton transfer in 9-aminoacridine carboxamides in water and in DNA. Office of Scientific and Technical Information (OSTI), septembre 1995. http://dx.doi.org/10.2172/130623.

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Kim, S. K., S. Li et E. R. Bernstein. Excited State Intermolecular Proton Transfer in Isolated Clusters : 1- Naphthol/Ammonia and Water. Fort Belvoir, VA : Defense Technical Information Center, mars 1991. http://dx.doi.org/10.21236/ada233637.

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Kim, S. K., S. C. Hsu, S. Li et E. R. Bernstein. Excited State Proton Transfer in the S1 State of 2-Allylphenol, 2- Propenylphenol and 2-Propylphenol and Their van der Waals Clusters with Water and Ammonia. Fort Belvoir, VA : Defense Technical Information Center, mars 1991. http://dx.doi.org/10.21236/ada233089.

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