Chiral Dinuclear Eu III , Tb III , and Y III Complexes Supported by P-Stereogenic Linear Tetraphosphine Tetraoxide.

Authors :: Tanase T
Nakamae K
Okawa Y
Hamada M
Matsumoto A
Nakajima T
Nakashima T
Kawai T
Source :: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2022 Feb 07; Vol. 28 (8), pp. e202104060. Date of Electronic Publication: 2022 Jan 03.
Publication Year :: 2022
Abstract: A P-stereogenic linear tetraphosphine tetraoxide, (R,R)- or (S,S)-dpmppm(=O) <subscript>4</subscript> , was synthesized to prepare C <subscript>2</subscript> dinuclear M(hfa) <subscript>3</subscript> complexes (M=Eu, Tb, Y) as the first example of lanthanide(III) complexes with P-chiral multidentate phosphine oxides. The mononuclear M(hfa) <subscript>3</subscript> complexes (M=Eu, Y) with a P-chiral diphosphine dioxide, tpdpb(=O) <subscript>2</subscript> , were also prepared, and comparison of their photophysical properties for the Eu <superscript>III</superscript> complexes revealed that significant chiral induction from the P-chiral centers arises on the achiral M(hfa) <subscript>3</subscript> units through intramolecular π-π stacking constraint in the dinuclear system.<br /> (© 2021 Wiley-VCH GmbH.)

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