Kenta Shinohara

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A novel, distributed timing allocation method [2, 3, 4, 5] has been proposed for packet collision avoidance in wireless sensor networks recently. In this paper, this proposed method is theoretically examined, and a hidden self-organization mechanism is unveiled. As the result, some important fundamental questions regarding this method are reasonably(More)
  • Feng Xu, Lifen Peng, +5 authors Junzo Otera
  • The Journal of organic chemistry
  • 2014
Highly strained cyclic acetylenes 5,6,11,12-tetradehydrodibenzo[a,e]cyclooctenes (Sondheimer-Wong diynes) having various substituents on their benzene rings were synthesized successfully by one-pot treatment of the corresponding formyl sulfones with diethyl chlorophosphate/lithium hexamethyldisilazide (LiHMDS) and then lithium diisopropylamide (LDA). When(More)
Photoluminescent diamino-substituted dinaphthopentalenes were synthesized successfully by the treatment of in situ prepared dinaphthocyclooctadiyne with lithium amide. This reaction involves a series of transformations including the nucleophilic addition of the lithium amide to a triple bond of the cyclooctadiyne moiety, transannulation, protonation of the(More)
A series of dibenzocyclooctatetraenes 6 bearing phenylethynyl and phenylsulfonyl groups were synthesized from bromo-substituted formylbenzyl sulfone 4 via cyclic dimerization of 4 and Sonogashira coupling of the resulting dibromocyclooctatetraene 3 with terminal acetylenes. The diamino derivative 6b exhibited dual emission with emission maxima at 436 and(More)
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