Synthesis and Characterization of Cyclometalated NHC Platinum Complexes with Chelating Carboxylate Ligands

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10395497" target="_blank" >RIV/00216208:11310/19:10395497 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=XIFOio.TIL" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=XIFOio.TIL</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/ejic.201900216" target="_blank" >10.1002/ejic.201900216</a>

Result language
angličtina
Original language name
Synthesis and Characterization of Cyclometalated NHC Platinum Complexes with Chelating Carboxylate Ligands
Original language description
Platinum(II) complexes [Pt((CC)-C-<^>*)(acac)], where (CC)-C-<^>* = 3-R-1-(phenyl-C-2)-1H-benzimidazol-2-ylidene-C-2 (R = Me, Ph) and acac = pentane-2,4-dionate, reacted with functionalized acetic acids YCH2CO2H (Y = NMe2, SMe and PPh2) with elimination of acetylacetone to produce the bis-chelate complexes of the type [Pt((CC)-C-<^>*)(YCH2CO2)]. Whereas the Pt(II) precursor with the less bulky methyl substituent (R) gave rise to single products having trans-C(NHC),Y geometry, its phenyl congener reacted less selectively, affording exclusively the product with trans-S,C(Ph) configuration for Y = SMe and mixtures of cis and trans isomers for Y = NMe2 and PPh2. These observations were well reproduced by different DFT functionals at the double- level of theory, which suggested rather small energy differences between the geometric isomers. The photophysical measurements showed that complexes [Pt((CC)-C-<^>*)(YCH2CO2)] are emissive in the blue region ((em) 460-490 nm) with photoluminescence quantum yields up to 36% and emission lifetimes in the range of 3-5 mu s.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
—
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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