http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Uoyama, Hiroki (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Kim, Pyosang,Sung, Jooyoung,Uoyama, Hiroki,Okujima, Tetsuo,Uno, Hidemitsu,Kim, Dongho American Chemical Society 2011 The journal of physical chemistry. B, Condensed ma Vol.115 No.14
<P>We have investigated the role of fused benzo rings on the electronic structures and intramolecular energy relaxation dynamics in a series of benzoporphyrins (<B>Bp1</B>, <I>syn</I>-<B>Bp2</B>, <I>anti</I>-<B>Bp2</B>, <B>Bp3</B>, and <B>Bp4</B>) by using time-resolved fluorescence measurements and theoretical calculations. Interestingly, even though <I>anti</I><B></B>- and <I>syn</I><B></B>-<B>Bp2</B> have the same number of fused benzo rings, in the respective absorption spectra, <I>anti</I><B></B>-<B>Bp2</B> shows an obvious splitting of B<SUB><I>x</I></SUB> (Q<SUB><I>x</I></SUB>) and B<SUB><I>y</I></SUB> (Q<SUB><I>y</I></SUB>) states, whereas <I>syn</I>-<B>Bp2</B> exhibits degenerate B and Q bands. These features provide two dynamical models for the effect of the position of substituted benzo rings on the intramolecular energy relaxation dynamics. <I>syn</I>-<B>Bp2</B> gives rise to similar intramolecular dynamics from the B state to the Q state in the case of <B>ZnTPP</B> having <I>D</I><SUB>4<I>h</I></SUB> molecular symmetry. On the other hand, <I>anti</I>-<B>Bp2</B> shows split B and Q bands in the order B<SUB><I>y</I></SUB> > B<SUB><I>x</I></SUB> > Q<SUB><I>x</I></SUB> > Q<SUB><I>y</I></SUB>, which leads a superimposition of the Q<SUB><I>x</I></SUB> (0,0) and Q<SUB><I>y</I></SUB> (1,0) bands. This overlap generates a strong coupling between these two states, which results in a direct internal conversion from B<SUB><I>x</I></SUB> (0,0) to Q<SUB><I>y</I></SUB> (0,0). This observation suggests that the anti-type fused position of benzo rings leads to a new mechanism in internal conversion from the B to the Q state. On the basis of this work, further insight was obtained into the effect of fused benzo rings on the photophysical properties of benzoporphyrins, providing a detailed understanding of the structure−property relationship in a series of benzoporphyrins.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcbfk/2011/jpcbfk.2011.115.issue-14/jp200493p/production/images/medium/jp-2011-00493p_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp200493p'>ACS Electronic Supporting Info</A></P>
-
Shape-dependent two-photon absorption in two-dimensionally extended benzoporphyrin arrays
Kim, Pyosang,Ham, Sujin,Oh, Juwon,Uoyama, Hiroki,Watanabe, Hajime,Tagawa, Kazunari,Uno, Hidemitsu,Kim, Dongho The Royal Society of Chemistry 2013 Physical chemistry chemical physics Vol.15 No.26
<P>In this study, we have investigated the shape-dependence of TPA cross-section values of two-dimensionally extended benzoporphyrin arrays to determine the relationship between the directionality of π-conjugation pathways and TPA properties.</P> <P>Graphic Abstract</P><P>In this study, we have investigated the shape-dependence of TPA cross-section values of two-dimensionally extended benzoporphyrin arrays to determine the relationship between the directionality of π-conjugation pathways and TPA properties. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cp50166c'> </P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
