Enantioenriched Ruthenium-Tris-Bipyridine Complexes Bearing One Helical Bipyridine Ligand: Access to Fused Multihelicenic Systems and Chiroptical Redox Switches
作者:Martin Kos、Rafael Rodríguez、Jan Storch、Jan Sýkora、Elsa Caytan、Marie Cordier、Ivana Císařová、Nicolas Vanthuyne、J. A. Gareth Williams、Jaroslav Žádný、Vladimír Církva、Jeanne Crassous
DOI:10.1021/acs.inorgchem.1c01379
日期:2021.8.16
2-pyridyl groups are described. The preparation was performed via an adapted Mallory reaction using aromatic imines as precursors. The obtained novel class of helical 2,2′-bipyridine ligands was then coordinated to Ru(bipy)22+ units, thus affording the first diastereomerically and enantiomerically pure [RuL(bipy)2]2+ (11a,c, L = 6a,c) or [Ru2L′(bipy)4]4+ (12, L′ = 10b) complexes. The topology and stereochemistry
描述了被一个或两个 2-吡啶基取代的新型氮杂[ n ]螺旋烯(6a - d,10a,b,n = 4-7)的合成和光物理和手性光学特性。该制备是通过使用芳族亚胺作为前体的经过调整的 Mallory 反应进行的。然后将获得的新型螺旋 2,2'-联吡啶配体与 Ru(bipy) 2 2+单元配位,从而提供第一个非对映异构和对映异构纯 [RuL(bipy) 2 ] 2+ ( 11a , c , L = 6a , c ) 或 [Ru 2L'(bipy) 4 ] 4+ ( 12 , L' = 10b ) 复合物。详细研究了这些新型金属螺旋结构的拓扑结构和立体化学,特别是使用 X 射线晶体学。有趣的是,与钌 (II) 的配位使得能够在同一支架内制备包含氮杂-和钌-螺旋烯的融合多螺旋系统。详细检查了这些复合物的光物理、手性和氧化还原特性,并证明了有效的氧化还原触发的手性转换活性。