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Title: Synthesis, Structures, and Catalytic Properties of Dinuclear Iridium(I) Complexes with a Hexadentate Macrocyclic Diamine-Tetracarbene Ligand: Synthesis, Structures, and Catalytic Properties of Dinuclear Iridium(I) Complexes with a Hexadentate Macrocyclic Diamine-Tetracarbene Ligand
Award ID(s):
1633870
NSF-PAR ID:
10062489
Author(s) / Creator(s):
; ; ; ;
Date Published:
Journal Name:
European Journal of Inorganic Chemistry
Volume:
2018
Issue:
14
ISSN:
1434-1948
Page Range / eLocation ID:
1595 to 1602
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Abstract

    By attaching pyridine groups to a diaza[6]helicene, a helical, bis‐ditopic, bis‐NN‐coordinating ligand can be accessed. Dinuclear rhenium complexes featuring this bridging ligand, of the form [{Re(CO)3Cl}2(NNNN)], have been prepared and resolved to give enantiopure complexes. These complexes are phosphorescent in solution at room temperature under one‐ and two‐photon excitation. Their experimental chiroptical properties (optical rotation, electronic circular dichroism and circularly polarized emission) have been measured. They show, for instance, emission dissymmetry factors of c.a. ±3x10−3. Quantum‐chemical calculations indicate the importance of stereochemistry on the optical activity, pointing towards further design improvements in such types of complexes.

     
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