Chirality induction to achiral molecules by silica‐coated chiral molecular assemblies

Abstract

Hybrid silica‐organic nanohelices are used to organize a large variety of nonchiral small organic molecules or inorganic anions to nanometer‐sized assemblies. Such chiral organization of achiral molecules induces chiroptical properties as detected by vibrational or electronic circular dichroism (CD), as well as from circularly polarized luminescence (CPL).

Induced circular dichroism from helicoidal nano substrates to porphyrins: the role of chiral self-assembly

“…35,38 The gemini surfactants, confined inside the nanospace of the silica nanohelix, maintain their chiral and crystalline conformation 42 even after the removal of tartrate, and are capable of transmitting the chiral information to the achiral anions which replace tartrate. 43–45 Notably, we have recently demonstrated ICD on 5,10,15,20-tetra-(4-sulfonatophenyl)porphyrin ( TPPS ) by IEx using the hybrid nanohelices. 43…”

“…43–45 Notably, we have recently demonstrated ICD on 5,10,15,20-tetra-(4-sulfonatophenyl)porphyrin ( TPPS ) by IEx using the hybrid nanohelices. 43…”

“…35,38 The gemini surfactants, confined inside the nanospace of the silica nanohelix, maintain their chiral and crystalline conformation 42 even after the removal of tartrate, and are capable of transmitting the chiral information to the achiral anions which replace tartrate. [43][44][45] Notably, we have recently demonstrated ICD on 5,10,15,20tetra-(4-sulfonatophenyl)porphyrin (TPPS) by IEx using the hybrid nanohelices. 43 Finally, more recently, we have investigated the association of metal salts with the helices using sequential drop casting (DC) of the helices and the chromophore solution onto a quartz plate (Fig.…”

Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters

“…[35][36][37][38] Even though CPL has been extensively used to study the excited state chiral properties of organic and inorganic molecular systems, [39][40][41] the technique is relatively new to the eld of luminescent nanomaterials. [42][43][44] Among the various mechanisms of CPL reported, circularly polarised thermally activated delayed uorescence (CP-TADF) has emerged as a promising candidate due to its ability to harvest triplet excitons and thereby enhance the efficiency in light emitting diodes. [45][46][47] CP-TADF is reported in a few organic systems possessing a close singlet-triplet energy gap; 48,49 however, such an observation is relatively new to the eld of nanocluster chirality.…”

Cooperative interaction between organic and inorganic moieties in hybrid silica nanohelices for enantioselective interaction

“…in the absence of chiral molecules in the system. 10,13,14 For the studies reported in this manuscript, we have then exchanged these Cl À again by two enantiomers of tartrates (Fig. 1C) in order to compare their inclusion mechanisms.…”