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In the present study, we use the term branching effect rather than the term dendritic effect because we are studying less perfect dendritic structures. However, the significance of the definition remains the same. To evaluate either dendritic or branching effect on a single molecular moiety, one must asses the positive or negative properties resulting from the presence of dendritic generation in the case of dendrimers and the branching units or molecular weight in case of hyperbranched materials versus the properties of a discrete molecular model compound of the single moiety under study. For examples on dendritic and branching effect, see: (a) Smith, K. D, Müller, L. Chem. Commun. 1999, 1915
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In the present study, we use the term "branching effect" rather than the term "dendritic effect" because we are studying less perfect dendritic structures. However, the significance of the definition remains the same. To evaluate either dendritic or branching effect on a single molecular moiety, one must asses the "positive" or "negative" properties resulting from the presence of dendritic generation in the case of dendrimers and the branching units or molecular weight in case of hyperbranched materials versus the properties of a discrete molecular model compound of the single moiety under study. For examples on dendritic and branching effect, see: (a) Smith, K. D.; Müller, L. Chem. Commun. 1999, 1915
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It is well established that GPC calibrated with linear standards often underestimates the molecular weights of globular polymers: (a) Hawker, C. J.; Lee, R.; Fréchet, J. M. J. J. Am. Chem. Soc. 1991, 113, 4583.
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This effect has also been observed in benzophenone inclusion complexes with calixarenes: Vieira Ferreira, L. F, Vieira Ferreira, M. R, Oliveira, A. S, Brano, T. J. F, Prata, J. V, Moreira, J. C. Phys. Chem. Chem. Phys. 2002, 4, 204
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This effect has also been observed in benzophenone inclusion complexes with calixarenes: Vieira Ferreira, L. F.; Vieira Ferreira, M. R.; Oliveira, A. S.; Brano, T. J. F.; Prata, J. V.; Moreira, J. C. Phys. Chem. Chem. Phys. 2002, 4, 204.
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We have previously found that the electron-donating groups at the aromatic rings of 2,2′,4,4′-tetramethoxybenzophenone provoke a proximity of the two lowest triplet states. As a consequence, the triplet state possesses an n,π* configuration in the nonpolar cyclohexane, and transient absorption spectra due to n,π* and π,π* simultaneously populated are observed upon laser excitation of TMBP in a less polar solvent, such as acetonitrile. The π,π* triplet is selectively populated in methanol see ref 22
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We have previously found that the electron-donating groups at the aromatic rings of 2,2′,4,4′-tetramethoxybenzophenone provoke a proximity of the two lowest triplet states. As a consequence, the triplet state possesses an n,π* configuration in the nonpolar cyclohexane, and transient absorption spectra due to n,π* and π,π* simultaneously populated are observed upon laser excitation of TMBP in a less polar solvent, such as acetonitrile. The π,π* triplet is selectively populated in methanol (see ref 22).
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40549134350
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As discussed in several articles, dendrimers are arguably ideal encapsulating agents because their controllable step-by-step synthesis leads to monodisperse macromolecules with well-defined primary structures and the internal and external part of the dendrimer may be tailored to modulate both the interior nanoenvironment and the external functionality presented by the molecules
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As discussed in several articles, dendrimers are arguably ideal encapsulating agents because their controllable step-by-step synthesis leads to monodisperse macromolecules with well-defined primary structures and the internal and external part of the dendrimer may be tailored to modulate both the interior nanoenvironment and the external functionality presented by the molecules.
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113 behaves as a recoverable and reusable photocatalyst in diazocompounds transformation
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Unpublished results
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113 behaves as a recoverable and reusable photocatalyst in diazocompounds transformation. Unpublished results.
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