A novel chiral nanographene (i.e. EP9H) with a pentadecabenzo[9]helicene core fragment has been synthesized and fully characterized. Single-crystal X-ray diffraction unambiguously confirms the helical structure. The fluorescence emission of EP9H is located in near infrared region (λem =684 nm) medium quantum yield (0.10) for helicene derivatives. Cyclic voltammetry reveals its seven quasi-reversible redox states from -2 to +5. Furthermore, enantiopure displays distinct CD signals broad...

A pyrrolyl-based triazolophane, incorporating CH and NH donor groups, acts as a receptor for the pyrophosphate anion in chloroform solution. It shows selectivity this trianion, followed by HSO4− > H2PO4− Cl− Br− (all corresponding tetrabutylammonium salts), with NH−anion interactions being more important than CH−anion interactions. In solid state, binds clip-like slot via hydrogen bonds.

Abstract Host-guest complex solid state molecular motion is a critical but underexplored phenomenon. In principle, it can be used to control machines that function in the state. Here we describe system operates on basis of complexation between an all-hydrocarbon macrocycle, D 4d -CDMB-8 , and perylene. Molecular this machine induced by exposure organic solvents or grinding gives rise different co-crystalline, mixed crystalline, amorphous forms. Distinct time-dependent emissive responses are...

Methylazacalix[n]pyridines (n = 4, 8) and methylazacalix[m]arene[n]pyridines (m n 2, 4) have been synthesized by a convenient fragment coupling approach starting from 2,6-dibromopyridine, 2,6-diaminopyridine, benzene-1,3-diamine. Thanks to the intrinsic electronic nature of nitrogen, which can adopt mainly sp(2) hybridization, allowing it variously conjugate, partially or not conjugate with adjacent one two pyridine rings, resulting nitrogen-bridged calixpyridine derivatives act as unique...

Carbene–metal molecular box: Two imidazolium macrocycles, H2-1(X)2 and H4-2(PF6)4, act as precursors for the formation of poly(NHC) ligands. The carbene ligands display metal-dependent conformations in forming organometallic complexes. In particular, they are capable stabilizing boxlike structures such syn-[Ag2(1)2]2+ [Ag4(2)2]4+ when exposed to linearly coordinated silver cations. contrast, a monomeric species featuring C-Pd-C angle about 90° is formed between 1 PdII. Detailed facts...

Owing to the electronic nature of bridging nitrogen atoms which can adopt different hybridizations and form various conjugations with adjacent pyridine(s), methylazacalix[4]pyridine underwent conformation cavity preorganization highly selectively bind Zn2+ ion. Rigidification coplanarity macrocyclic ring led a great enhancement fluorescence intrinsic fluorescent host molecule.

A new approach to anion sensing that involves excimer disaggregation induced emission (EDIE) is reported. It the anion-mediated of formed from a cationic macrocycle. This leads an increase in observed fluorescence intensity. The macrocycle question, cyclo[1]N2,N6-dimethyl-N2,N6-bis(6-(1H-imidazolium-1-yl)pyridin-2-yl)pyridine-2,6-diamine[1]1,4-dimethylbenzene (12+; prepared as its PF6– salt), obtained ca. 70% yield via simple cyclization. X-ray diffraction analyses single crystals revealed...

The molecular recognition of methylazacalix[4]pyridine (MACP-4; 1) towards various diols was investigated by using (1)H NMR spectroscopic and X-ray diffraction analysis. As a unique macrocyclic host molecule that undergoes conformational inversions very rapidly in solution, MACP-4 has been shown to self-regulate its conformation, through the formation different conjugations four bridging nitrogen atoms with their adjacent pyridine rings, form cavity best fits guest species intermolecular...

This feature article summarises recent contributions of the authors in area flexible imidazolium macrocycle and related anion-induced supramolecular self-assembly.

Described here is a three-component self-assembly system that displays emergent behavior differs from of its constituents. The comprises an all-hydrocarbon octaaryl macrocycle cyclo[8](1,3-(4,6-dimethyl)benzene (D4d-CDMB-8), corannulene (Cora), and I2. No appreciable interaction seen between any pair these three-components, either in cyclohexane or under various crystallization conditions. On the other hand, when all three-components are mixed allowed to undergo crystallization,...

Abstract Atomic precise chiral molecules with all‐hydrocarbon backbones, such as helicenes and related π‐extended derivatives, attract critical interests due to their great application potential in many fields (e. g., optical materials, asymmetric catalysis, molecular machines). Herein, the main development of these past decade was summarizes, including enantioselective synthesis helicenes, helicene extension along perpendicular helical axis, well following both directions, namely helix axis...

Abstract A novel chiral nanographene (i.e. EP9H ) with a pentadecabenzo[9]helicene core fragment has been synthesized and fully characterized. Single‐crystal X‐ray diffraction unambiguously confirms the helical structure. The fluorescence emission of is located in near infrared region ( λ em =684 nm) medium quantum yield (0.10) for helicene derivatives. Cyclic voltammetry reveals its seven quasi‐reversible redox states from −2 to +5. Furthermore, enantiopure displays distinct CD signals...

Bowl-shaped polycyclic aromatic hydrocarbons (PAHs), or buckybowls, are renowned for their unique structures and physicochemical properties, making them promising fragments functional materials. While well-known examples like corannulene sumanene demonstrate potential, synthetic challenges have limited the development of other fullerene fragments. Recent advancements, particularly incorporation heteroatoms, expanded structural diversity buckybowls. In this study, we report synthesis a novel...

Objectives We aimed to clarify the influence of facial expressions on providing early recognition and diagnosis Parkinson’s disease (PD). Methods included 18 people with PD controls. The participants were asked perform 12 monosyllabic tests, 8 disyllabic 6 multisyllabic tests whole process recorded. Then 26 video clips recorded used decipher muscle movements face expression via Noldus FaceReader 7.0 software. 16 suitable variables selected construct a Bayesian network model. Results area...

A quadruple helicene with a cyclooctatetrapyrrole core was synthesized via simple Ullmann reaction. Its single-crystal structure exhibits saddle shape. The compound shows fluorescence emission λem = 575 nm and good chiroptical properties, including dissymmetric absorption factor (|gabs|) of 5.84 × 10–3 (|glum|) 1.21 10–2.

Double [8]helicene 1, featuring a dibenzo[g,p]chrysene core, was synthesized via the Scholl reaction, and its structure unambiguously confirmed by single-crystal X-ray diffraction analysis of dicationic salt [1-Cl]2+·(SbCl6-)2. The compound exhibits red fluorescence with an emission maximum at 618 nm (λem) quantum yield 16.2%, highlighting potential in optoelectronic applications. Furthermore, circular dichroism (CD) circularly polarized luminescence (CPL) measurements reveal notable...

Substituent group modifications can influence the conductivity of organic materials. However, achieving several orders magnitude increases in through minor substituent changes remains a challenge. Here, we report observation such large cocrystals cyclo[8]pyrroles and polyiodides. Two were prepared, one from all-ethyl-substituted cyclo[8]pyrrole (1•+), which forms 2D stacked structure [(1•+)2⊃(I7)-•(I24)-], other methyl-ethyl-substituted analogue (2•+), yields 3D layered [2•+•(I16)-]. The...

A set of metal–organic rotaxane frameworks (MORFs) are constructed with the use a tetraimidazolium macrocycle, terephthalate dianion, and trivalent lanthanide metal cations Nd(III), Sm(III), Eu(III) or Tb(III) reported herein. The specific choice cation allows for control structure luminescent properties resulting molecular frameworks.

Substituent effects play critical roles in both modulating reaction chemistry and supramolecular self-assembly processes. Using substituted terephthalate dianions (p-phthalic acid dianions; PTADAs), the effect of varying type, number, position substituents was explored terms their ability to regulate inherent anion complexation features a tetracationic macrocycle, cyclo[2](2,6-di(1H-imidazol-1-yl)pyridine)[2](1,4-dimethylenebenzene) (referred as Texas-sized molecular box; 14+), form its...

Carbon-rich macrocycles and carbon nanoribbons act as unusual optical materials in the free form or when combined with other guests.

A N-doped nanographene 1 was synthesized. Compared to the hexatomic carbon ring conjugated TB(phen), this study focuses on effects corresponding pentatomic conjugation and substituent group of physical properties.

New stimulus-responsive scaffolds are of interest as constituents hierarchical supramolecular ensembles. 1,3,5-2,4,6-Functionalized, facially segregated benzene moieties have a time-honored role building blocks for host molecules. However, their user switchable motifs in the construction multi-component structures remains poorly explored. Here, we report molecular cage 1, which consists bent anthracene dimer 3 paired with 1,3,5-tris(aminomethyl)-2,4,6-triethylbenzene 2. As result pH-induced...

Abstract The introduction of precise pore defects into nanocarbon structures results in the emergence distinct physicochemical characteristics. However, there is a lack research on non‐planar chiral nanographene involving defects. Herein, we have developed two analogues to π‐extended pentadecabenzo[9]helicene ( EP9H ) containing embedded Each molecules, namely extended dodecabenzo[7]helicene ED7H ; 1 or nonabenzo[5]helicene EN5H 2 ), exhibits dual‐state emission. Significantly, value | g lum...

Bowl-shaped polycyclic aromatic hydrocarbons (PAHs) have garnered significant attention over the past decades due to their visually striking molecular architectures, along with exceptional physical and chemical properties. These unique...