Retraction: Hydrogen sulfate ion sensing in aqueous media based on a fused pyrimido benzothiazole derivative

[This retracts the article DOI: 10.1039/C6RA01980C.].

Retraction: Dipyrrolyl-bis-sulfonamide chromophore based probe for anion recognition

[This retracts the article DOI: 10.1039/C4RA04000G.].

Correction: Dipyrrolyl-bis-sulfonamide chromophore based probe for anion recognition

Correction for ‘Dipyrrolyl-bis-sulfonamide chromophore based probe for anion recognition’ by Namdev V. Ghule et al., RSC Adv., 2014, 4, 27112–27115, DOI: 10.1039/C4RA04000G.

Correction: Wheel like supramolecular assembly of cyclam decorated gold nanoparticles induced by Cd2+

Correction for ‘Wheel like supramolecular assembly of cyclam decorated gold nanoparticles induced by Cd²⁺’ by Tanuja Yeluri et al., RSC Adv., 2015, 5, 21511–21514, DOI: 10.1039/C5RA00777A.

Synthesis and Liquid Crystalline Properties of Unsymmetrically Substituted Naphthalenediimides with a Polar Headgroup: Effect of Amide Hydrogen Bonding and Alkyl Chain Length

A series of new unsymmetrically substituted naphthalenediimide (NDI) moieties NDI‐1 to NDI‐6 were synthesized. The structures of these compounds were confirmed by means of FT‐IR, ¹H NMR, ¹³C NMR, ESI‐mass and HRMS spectroscopic measurements. UV/Vis and fluorescence spectroscopy were employed to investigate the photophysical properties of the prepared compounds in solution and in the solid state. Using the onset of UV/Vis absorption, the optical band gaps were calculated. Cyclic voltammetry measurements were performed to study the electrochemical behavior and to calculate the LUMO energy levels. The thermal properties of NDI derivatives were studied by differential scanning calorimetry. The mesomorphic birefringent behavior of the NDI derivatives was investigated with polarizing optical microscopy. Among all of the studied NDI derivatives, only NDI‐1, NDI‐2, and NDI‐3 showed liquid crystalline texture, owing to the presence of an amide linkage for H‐bonding along with aromatic moieties for π–π‐stacking.

Cover Feature: Synthesis and Liquid Crystalline Properties of Unsymmetrically Substituted Naphthalenediimides with a Polar Headgroup: Effect of Amide Hydrogen Bonding and Alkyl Chain Length (ChemistryOpen 1/2018)

The Cover Feature illustrates the outstanding liquid‐crystalline properties of unsymmetrically substituted naphthalenediimides through amide hydrogen bonding and hydrophobic interactions along with p—p stacking. More information can be found in the Full Paper by N. V. Ghule et al. on page 61 in Issue 1, 2018 (DOI: 10.1002/open.201700151).

Effect of Amide Hydrogen Bonding Interaction on Supramolecular Self-Assembly of Naphthalene Diimide Amphiphiles with Aggregation Induced Emission

In the present work, two new naphthalene diimide (NDI) amphiphiles, NDI-N and NDI-NA, were successfully synthesized and employed to investigate their self-assembly and optical properties. For NDI-NA, which contains an amide group, aggregation-induced emission enhancement (AIEE) was demonstrated in the presence of various ratios of methylcyclohexane (MCH) in chloroform, which led to the visual color changes. This new amide-containing NDI-NA amphiphile formed nanobelt structures in chloroform/MCH (10:90, v/v) and microcup-like morphologies in chloroform/MCH (5:95, v/v). The closure of these microcups led to the formation of vesicles and microcapsules. The structural morphologies gained from the solvophobic control of NDI-NA were confirmed by various complementary techniques such as infrared spectroscopy, X-ray diffraction, and scanning and transmission electron microscopy. In the absence of the amide moiety in NDI-N, no self-assembly was observed, indicating the fundamental role of H-bonding in the self-association process.

The fluorescence detection of autophagosomes in live cells under starvation using core-substituted naphthalenediimide probes

We developed NDI-C probe for the analysis of the autophagosomes in live cells. A new flow cytometric method was also developed for the analysis of cell population on the basis of intracellular pH.

Hydrogen sulfate ion sensing in aqueous media based on a fused pyrimido benzothiazole derivative

The receptor 3-cyano-4-imino-2-methylthio-4H-pyrimido[2,1-b][1,3]benzothiazole (SVK-1) was employed for the selective sensing of HSO₄⁻ ions in aqueous media.

A Naphthalenediimide-Based Fluorescent Sensor for Detecting the pH within the Rough Endoplasmic Reticulum of Living Cells

An amino-core-substituted naphthalenediimide (NDI) derivative has been synthesized in good yield in two steps. The NDI bearing a diamine moiety undergoes a reversible protonation-deprotonation process, which results in intensity changes in the absorption and emission spectra. This derivative exhibits good photostability, good selectivity, high sensitivity, and is employed to exhibit the pH within the rough endoplasmic reticulum of living cells.

Wheel like supramolecular assembly of cyclam decorated gold nanoparticles induced by Cd2+

A gold nanoparticle (Au NP) system based on interaction between cyclam and Au NPs resulted into well defined wheel like supramolecular nanostructures in the presence of Cd²⁺.

A One-Dimensional Superstructure from the Self-Assembly of Ag Nanoparticles Induced by Cu2+ Ion Coordination

The self-assembly of spherical silver nanoparticles with variable size and controlled organization using triglycine as an organic template is described. Triglycine and silver nitrate were used as the starting materials for the preparation of the spherical nanoparticles, and in the presence of copper cations, the particles further self-assembled into one dimensional nanostructures. The formation of supramolecular nanoaggregates was evaluated by means of UV/vis, TEM, SEM, and energy dispersive X-ray spectroscopy.