کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
28417 | 44074 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
S2- and S1-states properties of zinc porphyrin polypeptides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
S2- and S1-states properties of zinc porphyrin polypeptides were investigated using various fast spectroscopic techniques. The B band of zinc porphyrin polypeptides showed broadening and shift to the longer wavelength side with the polymerization degree, indicating the interaction between the porphyrin units. The lifetime of S2-fluorescence became shorter with increasing the polymerization degree. This phenomenon can be explained by applying the energy gap law to the S2-S1 internal conversion. From the picosecond transient absorption measurements, singlet-singlet annihilation was confirmed, indicating the intrachain singlet energy migration in the polypeptides. The annihilation rate became faster with the polymerization degree because of the shorter distance between the zinc porphyrin units of longer polypeptides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issues 2â3, 20 May 2007, Pages 346-350
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issues 2â3, 20 May 2007, Pages 346-350
نویسندگان
Mamoru Fujitsuka, Dae Won Cho, Nathalie Solladié, Vincent Troiani, Hongjin Qiu, Tetsuro Majima,