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81.
Gilles Lemercier Adeline Bonne Mickaël Four Latvi M. Lawson-Daku 《Comptes Rendus Chimie》2008,11(6-7):709-715
This short review provides a concise summary of the current state of research on the population by two-photon absorption of the triplet metal-to-ligand 3MLCT excited state of ruthenium(II) complexes. Several effective and potential applications of this nonlinear optics phenomenon (optical power limiting in the near infrared, biological imagery and photodynamic therapy, PDT) and related linear effects will also be presented. 相似文献
82.
Henri‐Pierre Jacquot de Rouville Romain Garbage Rita E. Cook Adeline R. Pujol Agnès M. Sirven Prof. Dr. Gwénaël Rapenne 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(10):3023-3031
Two new nanovehicles that have extended aromatic platforms as the cargo zones have been obtained. Two strategies were considered for the formation of the perylene core from two naphthalene precursors. The first was based on a Scholl‐type reaction involving an oxidant, and the second used a brominated derivative to perform a homocoupling reaction. The first strategy failed under diverse coupling conditions in the presence of several strong oxidants. Nevertheless, the use of CoF3 in trifluoroacetic acid triggered a dimerization reaction between two ester groups of one molecule and the naphthalene unit of another, thereby surprisingly yielding a ten‐membered carbon macrocycle. The second strategy encountered a lack of reactivity of the substrate under several homocoupling conditions. The dimerization was not easily performed but Ullmann‐type conditions ultimately gave the expected product. The low yield and low solubility of the product encouraged us to modify our initial design. The synthesis of a new chassis that incorporated additional tert‐butyl groups improved the solubility of the molecules and also prevented overcyclization of the aromatic platform by blocking these positions. Some p‐phenylene spacers were also intercalated between the iodine and perylene centers to increase the reactivity of the halide towards coupling reactions. Two new chassis were obtained by Scholl‐type oxidative coupling using FeCl3 as the oxidant. The introduction of four triptycene wheels allowed the formation of the two corresponding nanovehicles. 相似文献
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