Single‐Crystal Organic Microtubes with a Rectangular Cross Section

Abstract

Ein einfacher Lösungsprozess unter Umgebungsbedingungen an Luft ohne Hilfe durch ein Tensid, einen Katalysator oder ein Templat ergab Einkristallmikroröhren mit rechteckigen Querschnitten aus [2‐(p‐Dimethylaminophenyl)ethenyl]phenylmethylenpropandinitril (DAPMP). Die DAPMP‐Mikroröhren (siehe REM‐Aufnahmen) zeigen ausgeprägte nichtlineare optische Eigenschaften mit Frequenzverdopplung.

Three‐Dimensional Macroscopic Assemblies of Low‐Dimensional Carbon Nitrides for Enhanced Hydrogen Evolution

“…A higher defect density at the center of crystals probably induces a higher local sublimation rate of triazine molecules, which would form the hollow structures during polycondensation. [15] A further volume shrinkage in the crystals results from the accompanied mass loss during polycondensation (for example, removal of NH 3 ) and formation of more condensed structures (Supporting Information, Figure S8). [16] The textural properties of MCA-DMSO-550 samples are summarized in the Supporting Information, Table S1.…”

Cooperative Assembly of Binary Molecular Components into Tubular Structures for Multiple Photonic Applications

“…In this stage (Figure 2 b), the tube diameter remains almost constant around 800 nm; however, the tube length keeps growing as the reaction time is increased, for example, the length is 30 mm after 1 h (Figure 2 e) and 60 mm after 3 h (Figure 2 f). The formation of binary tubes follows a typical 1D growth process rather than the twisted-belt mechanism reported for amphiphilic molecules and peptides, [4] or the recently reported "etching" mechanism, [12] in which crystalline tubular structures are converted from their solid counterparts by dissolution using either liquid or gaseous solvents. The formation of binary tubes follows a typical 1D growth process rather than the twisted-belt mechanism reported for amphiphilic molecules and peptides, [4] or the recently reported "etching" mechanism, [12] in which crystalline tubular structures are converted from their solid counterparts by dissolution using either liquid or gaseous solvents.…”

“…After the reaction time exceeds 3 h, both the transverse and longitudinal growth terminate (Figure 2 b). The formation of binary tubes follows a typical 1D growth process rather than the twisted-belt mechanism reported for amphiphilic molecules and peptides, [4] or the recently reported "etching" mechanism, [12] in which crystalline tubular structures are converted from their solid counterparts by dissolution using either liquid or gaseous solvents.…”

Strong Charge‐Transfer Chromophores from [2+2] Cycloadditions of TCNE and TCNQ to Peripheral Donor‐Substituted Alkynes

“…Therefore, a hemispherical structure was formed in which the molecules flowed with the solvent and aggregated along the initial opening hole. In the growth process to form the hollow tubular microstructures, the strong intermolecular interactions observed in the crystal packing are proposed to act as the driving force for the molecules to aggregate, as confirmed by similar X‐ray diffraction patterns between the aggregate and the crystal (Figure 4d) 3c,25…”