Výsledky vyhledávání - "and Jacob J. Piet"

Photo-induced charge separation on conjugated porphyrin chains

Autor: John M. Warman, Harry L. Anderson, Jacob J. Piet

Publikováno v: Scopus-Elsevier

Photoexcitation of isolated conjugated chains of butadiyne-linked porphyrins ([−P-≡−≡−]n with n ≈ 10) in dilute solution in benzene is followed by intrachain charge separation. The product of the quantum-yield and the effective one-dimens

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cacfb511b2f1751e45e3fb3b800fb846
https://ora.ox.ac.uk/objects/uuid:f822d228-feef-4602-8e45-39ecfd97953d

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Remarkable solvent-dependent excited-state chirality

Autor: Nina P. M. Huck, Richard A. van Delden, John M. Warman, Jacob J. Piet, Harry P. J. M. Dekkers, Ben L. Feringa, Stefan C. J. Meskers

Publikováno v: Journal of the American Chemical Society, 125(50), 15659-15665. AMER CHEMICAL SOC
Journal of the American Chemical Society, 125(50), 15659-15665. American Chemical Society

The photochemical control of ground- and excited-state chirality of (M)-cis-(1) and (P)-trans(2)-2-nitro-7-(dimethylamino)-9-(2',3'-dihydro-1'H-naphtho[2,1-b]-thiopyran-1'-ylidene)-9H-thioxanthene is described. It is shown that while ground state chi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a727e997a1c06ccc2cf3d58e2f3e759d
https://hdl.handle.net/11370/5b02c37b-6085-4587-b188-91d0fb2f622b

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Photoinduced Charge Separation in Cyclohexylidene-Based Donor−(σ-Bridge)−Acceptor Compounds − Building Blocks for Materials

Autor: Paul C. M. van Gerven, Cornelis A. van Walree, Wibren D. Oosterbaan, Remco W. A. Havenith, Jacob J. Piet, Mattijs Koeberg, Rolf Gleiter, Leonardus W. Jenneskens, Jan W. Zwikker

Publikováno v: European Journal of Organic Chemistry. 2003:3117-3130

We describe the syntheses and properties of five semi-rigid donor−(σ-bridge)−acceptor (D−σ−A) compounds. These compounds, which are candidates for incorporation in materials, have aniline-type donors and (mixed) cyano- and alkoxycarbonyl-1,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::715c9f43833202e82e9d332ed215b73b
https://doi.org/10.1002/ejoc.200200693

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Dipolar Excitonic States of Oligo-Anthrylenes

Autor: John M. Warman, Jacob J. Piet, Klaus Müllen, Martin Baumgarten

Publikováno v: The Journal of Physical Chemistry A. 106:2318-2321

Photoexcitation of dimeric, trimeric, and tetrameric oligomers of anthracene in benzene results in the formation of relaxed S 1 excitonic states with dipole moments of 6.9, 8.0, and 9.1 D respectively. Dipole reversal occurs with a relaxation time in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::81839552446fb24a557aed1440504299
https://doi.org/10.1021/jp012870o

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Symmetry Breaking in the Relaxed S1 Excited State of Bianthryl Derivatives in Weakly Polar Solvents

Autor: John M. Warman, B. Wegewijs, Jacob J. Piet, Ferdinand C. Grozema, Wouter Schuddeboom

Publikováno v: Journal of the American Chemical Society. 123:5337-5347

The flash-photolysis time-resolved microwave conductivity technique (FP-TRMC) has been used to investigate the nature of the relaxed S(1) state of 9,9'-bianthryl (AA), 10-cyano-9,9'-bianthryl (CAA), and 10,10'-dicyano-9,9'-bianthryl (CAAC). Changes i

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https://doi.org/10.1021/ja004341o

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Photoinduced Intramolecular Charge Separation in Donor/Acceptor-Substituted Bicyclohexylidene and Bicyclohexyl

Autor: Jan W. Verhoeven, John M. Warman, Wouter Schuddeboom, Cornelis A. van Walree, Jacob J. Piet, Leonardus W. Jenneskens, Frans J. Hoogesteger, Martin R. Roest

Publikováno v: Chemistry-A European Journal, 6, 2948-2959. Wiley-VCH Verlag

The photophysical properties of a bicyclohexylidene (1DA) and a bicyclohexyl (2DA) substituted with an anilino electron donor and a dicyanoethylene electron acceptor have been studied. Quenching of local donor emission is observed for these compounds

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::739862b176a82566f7b9c6885019a31d
https://doi.org/10.1002/1521-3765(20000818)6:16<2948::aid-chem2948>3.0.co

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Stepwise versus Direct Long-Range Charge Separation in Molecular Triads

Autor: Jan W. Verhoeven, John M. Warman, R.J. Willemse, Jacob J. Piet, Albert M. Brouwer, F. Hartl

Publikováno v: Journal of the American Chemical Society. 122:3721-3730

Trifunctional electron donor−donor−acceptor molecules are described in which photoinduced charge separation, D2−D1−A* → D2−D1+−A-, is followed by a charge migration step D2−D1+−A- (CS1) → D2+−D1−A- (CS2), leading to a relative

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https://doi.org/10.1021/ja983716r

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Exploring the Limits of the Electrostatically Induced Conformational Folding Process in Charge-Separated Excited States: Retarding Effect of Long Alkyl Tails Attached to the Chromophores

Autor: John M. Warman, Xavier Y. Lauteslager, Jan W. Verhoeven, Marcel J. Bartels, Albert M. Brouwer, Jacob J. Piet

Publikováno v: European Journal of Organic Chemistry. 1998:2467-2481

Six new donor-bridge-acceptor compounds have been synthesized which contain a long n-tetradecyl chain attached to the donor or acceptor moiety, or to both of them. Systems 1, 2, and 3 are analogs of the fluorescent probe molecule Fluoroprobe (4). The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5382e7bfad60646a5119b4e9810f9503
https://doi.org/10.1002/(sici)1099-0690(199811)1998:11<2467::aid-ejoc2467>3.0.co

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Electronic interactions in rigidly linked naphthalene dimers

Autor: Wouter Schuddeboom, Jacob J. Piet, Gregory O. Turner, Michael N. Paddon-Row, Gregory D. Scholes, Kenneth P. Ghiggino, John M. Warman

Publikováno v: Chemical Physics Letters. 292:601-606

Singlet state (S 1 ) radiative and non-radiative decay rates and S 1 polarisabilities have been determined for naphthalene dimers where the chromophores are separated by a rigid polynorbornane bridge of varying length corresponding to 2, 4 and 6 σ-b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c78e428d3b23c325641897af944de28f
https://doi.org/10.1016/s0009-2614(98)00692-7

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Excited State Localization or Delocalization in C3-symmetric Amino-substituted Triphenylbenzene Derivatives

Autor: Mark Van der Auweraer, and Jacob J. Piet, Frans C. De Schryver, Wouter Verbouwe, John M. Warman

Publikováno v: Journal of the American Chemical Society. 120:1319-1324

The site-to-site intramolecular excitation transfer and excitation trapping on one site in amino-substituted triphenylbenzene derivatives, which are characterized by a 3-fold symmetry, have been studied by fluorescence spectroscopy and time-resolved

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::173baa1e2f8cd1816609e20bf2ea91f4
https://doi.org/10.1021/ja9725615

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