Photoinduced Intramolecular Charge Separation and Recombination in a Donor-Acceptor Dyad Linked via Tetrahedral Carbon Atom. Photophysics of a Malachite Green Lactone Analogue

• Autorzy: Karpiuk J. , Karolak E. , Nowacki J.
• Języki publikacji: EN

Abstrakty

EN

Lactone forms of triarylmethane dyes (LTAM) with donor-acceptor-donor triad structure undergo ultrafast quantitative intramolecular charge separation (CS) with formation of a highly polar 1CT state. To clarify the role of the electron donating part in the CS process, 3-methyl-3-(4-dimethylaminophenyl)phthalide (MGLA), an analogue of malachite green lactone (MGL) with only one D part in a D-A dyad structure has been synthesized and its photophysics compared to those of MGL, leucomalachite green (MGH) and malachite green leuconitrile (MGCN). The photoinduced electron transfer processes in MGLA show close analogy with MGL and prove that (i) the tetrahedral carbon atom coupled with C-O bond in quasi-spiro configuration is a very efficient link in ultrafast intramolecular electronic communication and that (ii) the photoinduced charge separation and recombination processes in LTAM molecules involve essentially only one electron-donating group.

Słowa kluczowe

EN

malachite green lactone; 3-methyl-3-(4-dimethylaminophenyl)phthalide; triaryl methane lactones; ultrafast intramolecular electron transfer; solvatochromism of absorption and fluorescence bands

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2008
• Tom: Vol. 82, nr 4
• Strony: 865--882
• Opis fizyczny: Bibliogr. 64 poz., rys.

Twórcy

autor

Karpiuk J.

autor

Karolak E.

autor

Nowacki J.

• Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland fax: [phone],

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