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Volumn 129, Issue 23, 2007, Pages 7220-7221

Two-photon absorbing block copolymer as a nanocarrier for porphyrin: Energy transfer and singlet oxygen generation in micellar aqueous solution

Author keywords

[No Author keywords available]

Indexed keywords

MACROGOL; PHOTOSENSITIZING AGENT; PORPHYRIN;

EID: 34250793441     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja071057p     Document Type: Article
Times cited : (72)

References (28)
  • 1
    • 0000303285 scopus 로고    scopus 로고
    • Academic Press: Boston, Chapter 43, p
    • (a) Pandey, R. K.; Zheng, G. The Porphyrin Handbook; Academic Press: Boston, 2000; Vol. 6, Chapter 43, p 157.
    • (2000) The Porphyrin Handbook , vol.6 , pp. 157
    • Pandey, R.K.1    Zheng, G.2
  • 18
    • 34250827720 scopus 로고    scopus 로고
    • Even using this strategy, aggregation of chromophores in water was still observed, resulting in the low quantum yield in micellar water (0.39) as compared with that in THF (0.89).
    • Even using this strategy, aggregation of chromophores in water was still observed, resulting in the low quantum yield in micellar water (0.39) as compared with that in THF (0.89).
  • 20
    • 34250800777 scopus 로고    scopus 로고
    • The energy transfer efficiency was determined by studying the quenching of the donor fluorescence from 410 to 620 nm in the presence of the acceptor at the same excitation wavelength 380 nm
    • The energy transfer efficiency was determined by studying the quenching of the donor fluorescence from 410 to 620 nm in the presence of the acceptor at the same excitation wavelength (380 nm).
  • 21
    • 34250802528 scopus 로고    scopus 로고
    • It should be noted that the slight quenching effect of 1 to P1 (3, 5, and 10% for 1/P1 with the molar ratios of 0.1/1, 0.6/1, and 1/1, respectively) was observed in their THF mixtures without micellar structures, possibly due to charge or electron transfer. However, these quenching effects were much smaller than those in the micelles. Thus, we believe that the size confinement in micelles may facilitate the requirement of the distance between the donor and acceptor (less than 10 nm) for FRET, though we did not calculate the exact distance between the donor and acceptor in micellar centers
    • It should be noted that the slight quenching effect of 1 to P1 (3, 5, and 10% for 1/P1 with the molar ratios of 0.1/1, 0.6/1, and 1/1, respectively) was observed in their THF mixtures without micellar structures, possibly due to charge or electron transfer. However, these quenching effects were much smaller than those in the micelles. Thus, we believe that the size confinement in micelles may facilitate the requirement of the distance between the donor and acceptor (less than 10 nm) for FRET, though we did not calculate the exact distance between the donor and acceptor in micellar centers.
  • 26
    • 34250804331 scopus 로고    scopus 로고
    • The amplification of 1/P1 determined by using 1/P2 as counterpart is affected by two factors: energy transfer efficiency and concentration of 1 within the micelles. The large amplification is observed in the molar ratio of 0.6/1 due to the fact that it has similar energy transfer efficiency but less aggregation of 1 within the micelles compared to that of a molecular ratio of 1/1.
    • The amplification of 1/P1 determined by using 1/P2 as counterpart is affected by two factors: energy transfer efficiency and concentration of 1 within the micelles. The large amplification is observed in the molar ratio of 0.6/1 due to the fact that it has similar energy transfer efficiency but less aggregation of 1 within the micelles compared to that of a molecular ratio of 1/1.
  • 28
    • 34250805265 scopus 로고    scopus 로고
    • 2O. The solution was bubbled with oxygen for 5 min to get an oxygen-saturated aqueous solution.
    • 2O. The solution was bubbled with oxygen for 5 min to get an oxygen-saturated aqueous solution.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.