Search

A highly selective chemosensor ( 1 ) bearing three salphen pockets fulfilled the recognition of Cu 2+ via obvious color change and significant absorption enhancement upon the introduction of Cu 2+ . Additionally, the coordination of 1 and Cu 2+ led to the formation of coordination polymer which further generated nanospheres, as evidenced by SEM, TEM, AFM, PXRD, and EDX investigations. [ABSTRACT FROM AUTHOR]

Abstract: A novel chemosensor for fluoride anion has been developed. This sensor, constructed by merging six phenolyl units into a hexaazatriphenylene (HAT) core, could recognize F− visually and spectroscopically with high selectivity over other anions, which was demonstrated by naked-eye experiment and UV–vis absorption spectroscopy study. [Copyright &y& Elsevier]

[Display omitted] • A hexaazatriphenylene (HAT)-based sensor is designed and synthesized. • The sensor selectively recognizes Ag+ ion with excellent selectivity, reversibility and fast-response. • The advantages of the sensor enable it to be capable of serving as a new type of colorimetric and fluorescent chemosensor. Herein, by symmetrically merging six thiophene units into the hexaazatriphenylene (HAT) core, a HAT-based sensor (1) was designed and synthesized, which was found capable of exhibiting selective recognition of Ag+ with detection limit as low as 1.79 × 10−6 M in chloroform featuring with significant fluorescence "turn-off" property. Through the systematical investigation with UV–Vis absorption, fluorescence spectroscopy and the naked-eye experiments, as well as the 1H NMR titration and the Job's plot, it was revealed that sensor 1 could complex with Ag+ in a stoichiometric ratio of 2:3. We envisage the construction of such a thiophene-derived HAT molecule is conducive to exploring new type of Ag+ sensors, and it also will bring potential application in environmental detection. [ABSTRACT FROM AUTHOR]

As a rigid and planar aza-based heteroaromatic scaffold, hexaazatriphenylene (HAT) exhibits excellent electron-deficient property and high π-π stacking tendency, which makes it an ideal building block in the construction of supramolecular architectures and functional materials. In addition, HATs have also been picked out as building blocks for the construction of novel porous organic polymers, one of the most attractive fields of porous materials in the past decade, which includes intrinsic microporosity (PIMs), π-conjugated microporous polymers (CMPs), and covalent organic frameworks (COFs). In this digest paper, the synthetic methods of HAT derivatives have been briefly introduced and some recent advances of HATs in the applications of supramolecular self-assembly and porous organic materials have been highlighted. [ABSTRACT FROM AUTHOR]

• Macrocyclic molecule with red light responsiveness. • Reversible photo-controlled molecular conformational changes. • Red light regulated molecular encapsulation in solution. A new photo-responsive tetracationic macrocycle was designed and synthesized by connecting two bis(imidazolium)-tetrachloro-azobenzene units with o -xylene linkers. The ability of red-light triggered photoisomerization of the incorporated tetrachloroazobenzene units has featured this macrocycle with reversible photo-triggered configurational transformation, benefiting from which the distinctive red-light regulated encapsulation behavior for aromatic dicarboxylic dianions in DMSO solution could be achieved. [ABSTRACT FROM AUTHOR]