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 : Mikhailovsky, A. (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Woo, H. Y.,Vak, D.,Korystov, D.,Mikhailovsky, A.,Bazan, G. C.,Kim, D.-Y. WILEY-VCH Verlag 2007 Advanced Functional Materials Vol.17 No.2
<P>Two water-soluble conjugated polyelectrolytes, poly(9,9′-bis(6-N,N,N-trimethylammoniumhexyl)fluorene-alt-1,4-(2,5-bis(6-N,N,N-trimethylammoniumhexyloxy))phenylene) tetrabromide (P1i) and poly((10,10′-bis(6-N,N,N-trimethylammoniumhexyl)-10H-spiro(anthracene-9,9′-fluorene))-alt-1,4-(2,5-bis(6-N,N,N-trimethylammoniumhexyloxy))phenylene) tetrabromide (P2i) are synthesized, characterized, and used in fluorescence resonance energy transfer (FRET) experiments with fluorescein-labeled single-stranded DNA (ssDNA-Fl). P1i and P2i have nearly identical &pgr;-conjugated backbones, as determined by cyclic voltammetry and UV-vis spectroscopy. The main structural difference is the presence of an anthracenyl substituent, orthogonal to the main chain in each of the P2i repeat units, which increases the average interchain separation in aggregated phases. It is possible to observe emission from ssDNA-Fl via FRET upon excitation of P2i. Fluorescein is not emissive within the ssDNA-Fl/P1i electrostatic complex, suggesting Fl emission quenching through photoinduced charge transfer (PCT). We propose that the presence of the anthracenyl “molecular bumper” in P2i increases the distance between optical partners, which decreases PCT more acutely relative to FRET.</P> <B>Graphic Abstract</B> <P>Two cationic conjugated polyelectrolytes (CCPs, see figure) with similar optical/electronic properties but different molecular structures act as fluorescence resonance energy transfer (FRET) donors to fluorescein (FL)-labeled single-stranded DNA. Comparison of their efficiencies of energy transfer indicates that backbone modification with “molecular bumpers” fine-tunes the competition between FRET and photoinduced charge-transfer (PCT) mechanisms. <img src='wiley_img/1616301X-2007-17-2-ADFM200600093-content.gif' alt='wiley_img/1616301X-2007-17-2-ADFM200600093-content'> </P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
