کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9776244 1509483 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical study on two-photon absorption for symmetric molecular systems composed of charged groups linked with a π-conjugated bridge
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Theoretical study on two-photon absorption for symmetric molecular systems composed of charged groups linked with a π-conjugated bridge
چکیده انگلیسی
Two-photon absorption (TPA) properties of symmetric molecular systems composed of charged groups linked with a π-conjugated bridge are investigated using the time-dependent perturbation theory with the single and double excitation CI method in the INDO/S approximation in order to clarify the effect of introducing charges on the TPA property. It turns out that the introduction of charges causes the red shift and significant enhancement of TPA cross section in the first peak position as compared to that in the neutral molecule with a similar framework. This is primarily ascribed to be the increase of transition moment between the one-photon-allowed, first excited state and the two-photon allowed, higher excited state for the charged molecules because of the localization of contributing MOs in the both-end regions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 154, Issues 1–3, 22 September 2005, Pages 181-184
نویسندگان
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