Zi-Yan Zhou

A pillar-layer MOF for detection of small molecule acetone and metal ions in dilute solution

A pillar-layer MOFs Cd(5-aip)L·3DMA (1) has been obtained under solvothermal conditions. 1 possesses non-interpenetrating pillar-layer framework with 1D rectangular-shape channels. The experimental results show that the luminescent intensity of 1 is highly dependent on metal ions and small solvent molecules, particularly Ni2+/Cd2+ ions and acetone.

Tetraphenylethene-containing supramolecular hyperbranched polymers: aggregation-induced emission by supramolecular polymerization in aqueous solution

Supramolecular hyperbranched polymers have been successfully constructed by using host-enhanced π–π interactions between CB[8] and a naphthyl-substituted tetraphenylethene derivative, which exhibit a strong fluorescence in aqueous solution due to aggregation-induced emission.

Tubular porous coordination polymer for the selective sensing of Cu2+ ions and cyclohexane in mixed suspensions of metal ions via fluorescence quenching

A luminescent coordination polymer with tubular channels was synthesized and characterized. The polymer was able to sense small solvent molecules and metal ions via fluorescence quenching. In particular, the polymer was able to rapidly and selectively sense Cu2+ ions in a suspension of mixed metal ions without any interference effects.

Binuclear alkynylplatinum( ii ) terpyridine complexes with flexible bridges behave as organogelators for several organic solvents

New binuclear alkynylplatinum(II) terpyridyl complexes with flexible bridges have been synthesized and characterized by 1H NMR, mass spectra and elemental analysis. These compounds can gelate a variety of organic solvents via multiple intermolecular interactions such as metal–metal (Pt⋯Pt) and π–π stacking interactions, hydrogen bonding interactions, and van der Waals forces, which were confirmed by ultraviolet-visible (UV-vis) absorption spectroscopy, rheological studies, temperature-dependent 1H NMR spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. Moreover, compound 1b with a longer flexible bridge (–O(CH2)6O–) exhibited higher gelation ability than that of compound 1a with a shorter flexible bridge (–O (CH2)4O–). A scanning electron microscopy (SEM) investigation of the xerogels from different organic solvents gave a visual image showing that fibrillar aggregates are entangled in three-dimensional network structures.

Synthesis, structure and sensing behavior of a Cd-coordination polymer based on 1,10-phenanthroline and 2-aminoterephthalic acid

The reaction of 2-aminoterephthalic acid and 1,10-phenanthroline with Cd(NO3)2⋅4H2O under solvothermal conditions leads to the formation of [Cd(2-aip)(phen)]⋅0.5C2H5OH ( 1). In the compound, dimeta...

Continuous detection of HCl and NH3 gases with a high-performance fluorescent polymer sensor

A novel fluorescent triazine-based covalent organic polymer (COP-1) sensor for HCl and NH3 gases has been designed and synthesized. Both the COP-1 powders that were dispersed in solvents and the COP-1 film that was formed on the surface of quartz sheets exhibited stable fluorescence and a sensitive HCl/NH3 response. Immersion in HCl-bubbled solvents weakens and red-shifts the fluorescence emission of the COP-1 powders, owing to a protonation-induced charge transfer (CT). Subsequent injection of NH3 into the solvents recovers the fluorescence via deprotonation. Interestingly, the microporous COP-1 film also shows a similar fluorescence response to HCl/NH3 gas, with high sensitivity and good reversibility, which suggests that it could serve as a solid-state optical probe for continuous and quantitative detection of HCl and NH3 gases. The formation of the red-shifting hydrogen bonds is found to be the origin of the response.

Rational design of a highly sensitive and selective "turn-on" fluorescent sensor for PO4(3-) detection.

An efficient turn-on fluorescent sensor for PO4(3-) has been developed by rationally designing an in situ-generated iron(iii) complex with a 1,8-naphthalene-based Schiff base unit. The sensor exhibits high sensitivity and selectivity in both solution and solid-state film, even in the presence of other phosphate anions such as HPO4(2-) and H2PO4(-).