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981.
Keisuke Santo Kentaro Uchida Dr. Keisuke Fujimoto Dr. Toshiyasu Inuzuka Prof. Dr. Kazutaka Hirakawa Dr. Tetsuya Sengoku Prof. Dr. Masaki Takahashi 《European journal of organic chemistry》2023,26(9):e202201479
Newly designed fluorophore systems with feather-like structures were constructed by connecting bisanthracene building units via a concise reaction sequence of bromination, etherification, and desilylation. Spectroscopic characterizations revealed that all of the fluorophore systems achieved high light absorptivity and high emission efficiency by preventing closely spaced anthracene chromophores from mutual interactions to reduce concomitant energy loss by fluorescence quenching. The application of fluorophore systems for the preparation of light-harvesting dyad materials has successfully demonstrated their potential utility as versatile photofunctional tools. 相似文献
982.
983.
Tsuneo Imamoto Takeshi Yoshizawa Koutaro Hirose Yoshiyuki Wada Hideki Masuda Kentaro Yamaguchi Hiroko Seki 《Heteroatom Chemistry》1995,6(2):99-104
(SP)-9-Anthryl(l-menthyloxy)phenylphosphine-borane and (SP)-(1-l-menthyloxy)benzo[b]phosphole-borane were synthesized, and their structures were characterized by X-ray crystallographic analysis. The latter compound was reduced by lithium naphthalenide at −78°C with cleavage of the P O bond, and the subsequent reaction with electrophiles afforded the corresponding tertiary phosphine-boranes possessing good to excellent enantiomeric excesses. 相似文献
984.
Yasuyuki Yamada Hiroaki Nakajima Chisa Kobayashi Yoshiaki Shuku Kunio Awaga Shigehisa Akine Kentaro Tanaka 《Chemistry (Weinheim an der Bergstrasse, Germany)》2023,29(1):e202203272
A C4h symmetrically substituted phthalocyanine, 1,8,15,22-tertrakis(2,4-dimethylpent-3-oxy)phthalocyanine (H2TdMPPc), was used to synthesize Tb3+-phthalocyanine double-decker complexes ([Tb(TdMPPc)2]s). Because H2TdMPPc has C4h symmetry, S,S, R,R, and meso isomers of [Tb(TdMPPc)2] were obtained depending on the difference in the direction of the coordination plane of two C4h-type phthalocyanines with respect to a central Tb3+ ion. We investigated the physical properties of these [Tb(TdMPPc)2] isomers, including their single-ion magnetic properties, and found that the spin-reversal energy barrier (Ueff) of the meso isomer was apparently higher than that of the enantiomers. Detailed crystal structural analyses indicated that the meso isomer has a more symmetrical structure than do the enantiomers, thereby suggesting that the higher Ueff of the meso isomer originated from the more highly symmetrical structure. 相似文献
985.