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Towards the IR Limit of the Triplet–Triplet Annihilation‐Supported Up‐Conversion: Tetraanthraporphyrin
Author(s) -
Yakutkin Vladimir,
Aleshchenkov Sergei,
Chernov Sergei,
Miteva Tzenka,
Nelles Gabriele,
Cheprakov Andrei,
Baluschev Stanislav
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200801305
Subject(s) - annihilation , excited state , excitation , quantum yield , photon , two photon excitation microscopy , yield (engineering) , excitation wavelength , wavelength , materials science , palladium , quantum , atomic physics , photochemistry , physics , chemistry , fluorescence , optoelectronics , optics , nuclear physics , quantum mechanics , biochemistry , metallurgy , catalysis
Taking IR to the limit! A palladium tetraaryltetraanthraporphyrin complex was shown to produce up‐conversion through the energetically conjoined triplet–triplet annihilation (TTA) with excitation wavelength in IR region ( λ ≈800 nm), excited at ultra low light intensity of 100 mW cm −2 . The up‐conversion process has very high quantum yield of 1.2 %. We demonstrate for the first time the most red‐shifted photon up‐conversion based on energetically conjoined TTA.