Table 4.

Selected Bond Lengths (Å) and Angles (deg) in [LnL₃]³⁺ (Standard Deviation in Parentheses)

	[EuL3]3+ (L = (R,R)−1))			[YbL3]3+ (L = (R,R)−1))
	Ligand	Ligand #1	Ligand #2	Ligand	Ligand #1	Ligand #2
Bond Lengths
Ln(1)-N(2)	2.564(2)	2.564(2)	2.564(2)	2.467(2)	2.467(2)	2.467(2)
Ln(1)-O(1)	2.397(2)	2.397(2)	2.397(2)	2.319(2)	2.319(2)	2.319(2)
Ln(1)-O(2)	2.397(2)	2.397(2)	2.397(2)	2.333(2)	2.333(2)	2.333(2)
Bite angles N–Ln–N, O–Ln–N, and O–Ln–O
N(2)-Ln(1)-N(2)#1		119.9(1)		120.0(1)
N(2)-Ln(1)-N(2)#2		119.9(1)		120.0(1)
N(2)#1-Ln(1)-N(2)#2		119.9(1)		120.0(1)
O(1)-Ln(1)-N(2)#1		69.6(1)		138.5(1)
O(2)-Ln(1)-N(2)#1		140.5(1)		69.8(1)
O(1)-Ln(1)-N(2)#2		136.6(1)		72.8(1)
O(2)-Ln(1)-N(2)#2		76.0(1)		137.6(1)
O(1)#1-Ln(1)-N(2)		136.6(1)		72.7(1)
O(2)#1-Ln(1)-N(2)		76.0(1)		137.6(1)
O(1)#1-Ln(1)-N(2)#2		69.6(1)		138.5(1)
O(2)#1-Ln(1)-N(2)#2		140.5(1)		69.8(1)
O(1)#2-Ln(1)-N(2)		69.6(1)		138.5(1)
O(2)#2-Ln(1)-N(2)		140.5(1)		69.8(1)
O(1)#2-Ln(1)-N(2)#1		136.6(1)		72.7(1)
O(2)#2-Ln(1)-N(2)#1		76.0(1)		137.6(1)
O(1)-Ln(1)-O(1)#1		81.6(1)		79.9(1)
O(1)-Ln(1)-O(1)#2		81.6(1)		79.9(1)
O(1)-Ln(1)-O(2)#1		82.7(1)		142.6(1)
O(1)-Ln(1)-O(2)#2		145.5(1)		83.9(1)
O(2)-Ln(1)-O(1)#1		145.5(1)		83.9(1)
O(2)-Ln(1)-O(1)#2		82.7(1)		142.6(1)
O(2)-Ln(1)-O(2)#1		82.1(1)		81.1(1)
O(2)-Ln(1)-O(2)#2		82.1(1)		81.1(1)
O(1)#1-Ln(1)-O(1)#2		81.6(1)		79.9(1)
O(1)#1-Ln(1)-O(2)#2		82.7(1)		142.6(1)
O(2)#1-Ln(1)-O(1)#2		145.5(1)		83.9(1)
O(2)#1-Ln(1)-O(2)#2		82.1(1)		81.1(1)

In addition to the formation of isostructural [LnL₃]³⁺ complexes for the Ln(III) series studied (Eu–Yb) in the solid state, the introduction of a chiral asymmetric carbon in each carboxamide moiety led to a diastereomeric resolution of the 9–coordinate Ln(III) complexes. The ligand triplet–excited–state energy is relatively well suited to sensitize many Ln(III) ions emitting in the VIS and/or NIR regions.