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- W2015645327 abstract "Abstract C 60 ‐boron dipyrromethene (BODIPY) dyads ( C ‐ 1 and C ‐ 2 ) were prepared as heavy‐atom‐free organic triplet photosensitizers for triplet‐triplet annihilation (TTA) based upconversion. BODIPY‐C≡C‐triphenylamine chromophores were used as the light‐harvesting antennas and C 60 was used as the singlet energy acceptor and the spin convertor to facilitate the intersystem crossing (ISC) of the dyads from the singlet excited state to the triplet excited state. The C 60 dyads strongly absorb visible light (molar extinction coefficients of up to 118800 M −1 cm −1 at 539 nm) and have a long‐lived triplet excited state (τ T =32.3 μs). The photophysical properties of the C 60 ‐dyads were studied with steady‐state and time‐resolved spectroscopy. Photoexcitation of the dyad with visible light produces firstly the singlet excited state of the antenna, then the singlet excited state of the C 60 unit through intramolecular energy transfer. In turn, the triplet excited state of the C 60 unit will be populated because of the intrinsic ISC property of C 60 . As a proof of concept, the dyads were used as heavy‐atom‐free organic triplet photosensitizers for TTA‐based upconversion." @default.
- W2015645327 created "2016-06-24" @default.
- W2015645327 creator A5045624998 @default.
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- W2015645327 creator A5077302369 @default.
- W2015645327 creator A5077643833 @default.
- W2015645327 date "2012-09-17" @default.
- W2015645327 modified "2023-10-18" @default.
- W2015645327 title "Visible-Light-Harvesting Triphenylamine Ethynyl C<sub>60</sub>-BODIPY Dyads as Heavy-Atom-Free Organic Triplet Photosensitizers for Triplet-Triplet Annihilation Upconversion" @default.
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