Chirality and Chiroptics of Lanthanide Molecular and Supramolecular Assemblies

Chirogenesis and Pfeiffer Effect in Optically Inactive EuIII and TbIII Tris(β-diketonate) Upon Intermolecular Chirality Transfer From Poly- and Monosaccharide Alkyl Esters and α-Pinene: Emerging Circularly Polarized Luminescence (CPL) and Circular Dichroism (CD)

“…In recent years, controlled chirogenesis led by several scenarios of intermolecular chirality transfer endowed with natural and human-made resources has become the most popular phenomenon allowing for an efficient generation of the desired optically active substances in the realms of organic chemistry (Bosnich, 1967 ; Hayward and Totty, 1969 ; Noack, 1969 ; Soai et al, 2019 ), supramolecular chemistry (Kobayashi et al, 1993 ; Huang et al, 1998 ; Prince et al, 2000 ; Borovkov et al, 2004 ; Hembury et al, 2008 ; Aida et al, 2012 ; Borovkov, 2014 ; Liu et al, 2015 ; Goto et al, 2017 ), polymer chemistry (Green et al, 1993 ; Yashima et al, 1995 ; Nakashima et al, 2001 ; Kawagoe et al, 2010 ; Numata and Shinkai, 2011 ; Lee et al, 2012 ; Duan et al, 2014 ; Fujiki, 2014 ; Wang et al, 2014 ; Akagi, 2019 ), and molecular aggregation/colloidal/gel chemistry (Palmans and Meijer, 2007 ; Isare et al, 2010 ; George et al, 2011 ; Mei et al, 2015 ; Roose et al, 2016 ; Sang et al, 2019 ). Particularly, chirogenesis in metal coordination chemistry by the chirality transfer has long been one of the central subjects in inorganic chemistry 1 (Mason and Norman, 1965 ; Kirschner and Ahmad, 1968 ; Kirschner and Bakkar, 1982 ; Mason, 1982 ; Brittain, 1983 , 1989 ; Riehl and Richardson, 1986 ; Tsukube and Shinoda, 2002 ; Di Bari and Salvadori, 2005 ; Muller, 2009 , 2014 ; Bünzli, 2010 ; Carr et al, 2012 ; Tanner, 2013 ; Miyake, 2014 ; Kumar et al, 2015 ; Zinna and Di Bari, 2015 ; Kono et al, 2016 ; Longhi et al, 2016 ; Lunkley et al, 2018 ; Wong et al, 2019 ).…”

Bright Long‐Lived Circularly Polarized Luminescence in Chiral Chromium(III) Complexes

“…Theo btained g lum are comparable to those of Ln III complexes and of the parent [Cr(dqp) 2 ] 3+ chromophore ( 1), but larger than other data reported for other chiral luminescent Cr III complexes and for various transition metal complexes (Table 1). [8,17,21,65] Thel arge g lum displayed for these chiral chromophores are attributed to (i)the magnetically allowed and strongly electrically dipole forbidden nature of the d-d Cr( 2 E/ 2 T 1 ! 4 A 2 ) which reduces considerably the electric dipole transition moment and makesm jjandm jjof the same order of magnitude (condition 2) and (ii)the parallel orientation of m and m for the optically active electronic transition in the D 2 symmetry group (condition 1).…”

Unusual Magnetic Field Responsive Circularly Polarized Luminescence Probes with Highly Emissive Chiral Europium(III) Complexes

“…Chirality plays an essential role in all living matter,itcan be observed from macroscopic to microscopic worlds,f rom human hands to natural amino acids.I texists in biological activities,including cellular uptake processes,metabolism and in protein structures.Significant efforts have been devoted to reveal its underlying existence in nature.T od ate,m ethodologies involving circular dichroism (CD) and circularly polarized luminescence (CPL) have proven to be valuable techniques that can be used to probe chiral information. [1,2] CPL and magnetic circularly polarized luminescence (MCPL), which are the emission analogs of CD and magnetic circular dichroism (MCD) respectively,p rovide ap owerful and highly sensitive way to determine the conformation of biological macromolecules in solution and hence give abetter understanding of their activities. [3][4][5] Thea dvantage that CPL offers over CD is that it can provide chiroptical information of the excited states of compounds to correlate with the local chiral structural changes dynamically.…”