Benzothiazole integrated into a cryptand for ESIPT-based selective chemosensor for Zn²⁺ ions

Abstract

A novel 2(2′-hydroxyphenyl) benzothiazole-based cryptand (L) exhibits high fluorescence intensity in the presence of Zn2+ ions by stopping the excited state intramolecular proton transfer (ESIPT) process with a detection limit of 0.20 μM.

Solvent-controlled self-assembly of tetrapodal [4 + 4] phosphate organic molecular cage

“…Considering that chlorohydrocarbon solvents are often used in the cage syntheses 11,16,[21][22][23]35,36 , a mixture of 1:1 acetonitrile and chloroform is then used for this reaction. Although the formation of partial [2 + 3] cage still occurs, the successful assembly of a [4 + 4] molecular age is achieved which can be verified by the presence of new ESI-MS peaks at m/z = 1006.17, 671.25 and 503.67 with the isotopic distribution patterns separated by 0.50 ± 0.01, 0.33 ± 0.01 and 0.25 ± 0.01 Da (Figs.…”

“…Discrete molecular architectures, especially those organic cage compounds, have received intensive attention in recent years [1][2][3][4][5][6][7][8] . These intriguing compounds featuring aesthetic geometry and intrinsic cavities display potential applications in gas or organic molecular separation [9][10][11][12][13][14] , catalysis [15][16][17][18] , porous liquids 19,20 and detection [21][22][23] . Synthetic control on the formation of versatile cages with given topologies is crucial before exploring their applications.…”

Synthesis of 2D Metal–Organic Nanosheets (MONs) by Liquid Phase Exfoliation: Applications in Effective Delivery of Antiulcer Drugs and Selective Adsorption and Removal of Cationic Dyes

“…The crystal data of Cu-MOF was obtained at 100 K using graphite monochromated Mo Kα radiation on a Bruker-SMART APEX-CCD diffractometer (λ = 0.71073 Å) . From the International Tables for X-ray Crystallography, various parameters such as atomic scattering factors, anomalous dispersion corrections, and linear absorption coefficients were obtained, and data collection was performed via the APEX231 software, whereas cell refinement and data reduction was performed with the SAINT software . An empirical absorption correction has been applied for collected reflections through SADABS .…”

Recent Advances in Tris‐Primary Amine Based Organic Imine Cages and Related Amine Macrocycles

“…The first one involved the synthesis of a novel benzothiazole based macrocycles where substituted isophalaldehyde 50 was taken as diformyl precursor and CsCl as template to carry out [2+3] condensation with tren (Scheme 18). [ 34 ] The OIC was reduced in situ by NaBH 4 to provide the desired macrocycle 51 . Single crystal X‐ray structure revealed the molecule was propeller shaped and intramolecular hydrogen bonding between –OH and –NH groups.…”