@article{oai:kumadai.repo.nii.ac.jp:00021581, author = {Akai, Ichiro and 赤井, 一郎 and 樋口, 正幸 and Higuchi, Masayuki and 鐘本, 勝一 and Kanemoto, Katsuichi and 唐沢, 力 and Karasawa, Tsutomu and 橋本, 秀樹 and Hashimoto, Hideki and 木村, 睦 and Kimura, Mutsumi and Akai, Ichiro and 赤井, 一郎 and 樋口, 正幸 and Higuchi, Masayuki and 鐘本, 勝一 and Kanemoto, Katsuichi and 唐沢, 力 and Karasawa, Tsutomu and 橋本, 秀樹 and Hashimoto, Hideki and 木村, 睦 and Kimura, Mutsumi}, issue = {5-6}, journal = {Journal of Luminescence}, month = {}, note = {application/pdf, 論文(Article), Energy transfer and shielding effect are studied in wire-type dendrimers (GnPPV: n-th generation dendrimer with poly(p-phenylenevinylene) backbone; n = 1, 2) having oligophenylene light-harvesting (LH) antenna. Following the excitation of the LH-antennae, backbone-polymers in GnPPV give rise to intense photoluminescence (PL) bands. This is due to the presence of highly efficient energy transfer from the LH-antennae to the backbone-polymers. The intensity of backbone-PL increases faster than the decay of the antenna-PL. This result indicates that rapid energy-transfer from antenna to backbone takes place utilizing the overlap of wavefunctions in the excited states. In G2PPV having larger LH-antenna, shielding effect against inter-backbone interactions is recognized more effectively than G1PPV. In solid films of GnPPV, red shifts of the backbone-PL bands are observed. This is caused by inter-backbone interactions of the wire-type dendrimers due to aggregation. The extent of the red shift in G2PPV is smaller than that of G1PPV. This result suggests that the larger LH-antenna in G2PPV substantially wraps its backbone-polymer and shields the inter-backbone interactions.}, pages = {948--951}, title = {Energy transfer dynamics in wire-type dendrimers having oligophenylene peripheries}, volume = {128}, year = {2008}, yomi = {アカイ, イチロウ and ヒグチ, マサユキ and カネモト, カツイチ and カラサワ, ツトム and ハシモト, ヒデキ and キムラ, ムツミ and アカイ, イチロウ and ヒグチ, マサユキ and カネモト, カツイチ and カラサワ, ツトム and ハシモト, ヒデキ and キムラ, ムツミ} }