Research output: Contribution to journal › Article › peer-review
Solvatochromic dual luminescence of Eu-Au dyads decorated with chromophore phosphines. / Belyaev, Andrey; Slavova, Sofia O.; Solovyev, Igor V.; Sizov, Vladimir V.; Jänis, Janne; Grachova, Elena V.; Koshevoy, Igor O.
In: Inorganic Chemistry Frontiers, Vol. 7, No. 1, 07.01.2020, p. 140-149.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Solvatochromic dual luminescence of Eu-Au dyads decorated with chromophore phosphines
AU - Belyaev, Andrey
AU - Slavova, Sofia O.
AU - Solovyev, Igor V.
AU - Sizov, Vladimir V.
AU - Jänis, Janne
AU - Grachova, Elena V.
AU - Koshevoy, Igor O.
PY - 2020/1/7
Y1 - 2020/1/7
N2 - Phosphine ligands, containing chromophore substituents-π-spacer-NPh2 (π-spacer = biphenyl, L1; naphthalene-ethynylphenyl, L2; and ethynyl-(phenylethynyl)anthracene, L3), were used to generate the corresponding gold(i) alkynyl complexes Au1-Au3 (alkynyl = ethynylphenyl-2,2′-bipyridine, epbpy). These compounds demonstrate intense fluorescence, which originates from the bipolar donor-π-Acceptor systems of coordinated phosphines with negligible contribution from the epbpy fragment. Due to the charge transfer characteristic of the excited state, Au1-Au3 reveal significant emission solvatochromism (particularly discernible for Au2, 428 nm in cyclohexane → 580 nm in acetonitrile). The bipyridine moiety of Au1-Au3 was utilized for binding these metalloligands to the {Eu(tta)3} red emitter (tta = 3-Thenoyltrifluoroacetonate) to give a family of novel dyads Au1Eu-Au3Eu. Incomplete energy transfer from L1-L3 to lanthanide ions, which are primarily sensitized by diketonate ligands, leads to dual luminescence. Analogous to the parent complexes Au1-Au3, the fluorescence component of the dyads is highly sensitive to the solvent polarity that provides great opportunities for color tuning, including white light generation.
AB - Phosphine ligands, containing chromophore substituents-π-spacer-NPh2 (π-spacer = biphenyl, L1; naphthalene-ethynylphenyl, L2; and ethynyl-(phenylethynyl)anthracene, L3), were used to generate the corresponding gold(i) alkynyl complexes Au1-Au3 (alkynyl = ethynylphenyl-2,2′-bipyridine, epbpy). These compounds demonstrate intense fluorescence, which originates from the bipolar donor-π-Acceptor systems of coordinated phosphines with negligible contribution from the epbpy fragment. Due to the charge transfer characteristic of the excited state, Au1-Au3 reveal significant emission solvatochromism (particularly discernible for Au2, 428 nm in cyclohexane → 580 nm in acetonitrile). The bipyridine moiety of Au1-Au3 was utilized for binding these metalloligands to the {Eu(tta)3} red emitter (tta = 3-Thenoyltrifluoroacetonate) to give a family of novel dyads Au1Eu-Au3Eu. Incomplete energy transfer from L1-L3 to lanthanide ions, which are primarily sensitized by diketonate ligands, leads to dual luminescence. Analogous to the parent complexes Au1-Au3, the fluorescence component of the dyads is highly sensitive to the solvent polarity that provides great opportunities for color tuning, including white light generation.
KW - WHITE-LIGHT-EMISSION
KW - NEAR-INFRARED LUMINESCENCE
KW - SINGLE ORGANIC-COMPOUND
KW - GENERALIZED-GRADIENT-APPROXIMATION
KW - AGGREGATION-INDUCED EMISSION
KW - ENERGY-TRANSFER
KW - PHOTOPHYSICAL PROPERTIES
KW - CHARGE-TRANSFER
KW - PHOSPHORESCENCE EMISSION
KW - HARNESSING FLUORESCENCE
UR - http://www.scopus.com/inward/record.url?scp=85077077633&partnerID=8YFLogxK
UR - http://xlink.rsc.org/?DOI=C9QI01015G
UR - http://www.mendeley.com/research/solvatochromic-dual-luminescence-euau-dyads-decorated-chromophore-phosphines
U2 - 10.1039/c9qi01015g
DO - 10.1039/c9qi01015g
M3 - Article
AN - SCOPUS:85077077633
VL - 7
SP - 140
EP - 149
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
SN - 2052-1545
IS - 1
ER -
ID: 50340256