Iron­(III) ions play a vital role in living biological systems, while organic pollutants including pesticides and antibiotics pose a great threat to the ecological environment. Effective detection for these species is crucial for human health and environmental protection. In this work, we designed and synthesized a new amino-decorated bridging ligand H2APDA and employed it to react with the environmentally friendly Mg­(II) ions to construct a novel magnesium luminescent metal–organic framework (Mg-LMOF), namely [Mg2(APDA)2(H2O)3]·5DMA·5H2O (Mg-APDA). The as-synthesized Mg-LMOF is a three-dimensional framework with one-dimensional hexagonal channels. These microporous channels are decorated with Lewis-base amino sites and uncoordinated O atoms, which facilitate the Mg-APDA to anchor and recognize various analytes. Mg-APDA can be used as a multiresponsive luminescent sensor to detect Fe­(III) ions, pesticides, and antibiotics effectively. To the best of our knowledge, this work represents the first amino-decorated Mg-LMOF as an efficient fluorescent sensor for detecting metal ions, pesticides, and antibiotics simultaneously.

An efficient C-H acylation of azo- and azoxybenzenes with α-keto acids has been developed by a combination of palladium catalysis and visible-light photoredox catalysis at room temperature under 1.5 W blue LED irradiation. This method tolerates a variety of disubstituted azo- and azoxybenzenes, as well as α-keto acids regardless of the nature of the substituents. A number of aryl ketones were obtained in good yields under mild reaction conditions.

A carbazole-functionalized Cd-MOF exhibits highly selective and sensitive fluorescence detection towards antibiotics, pesticides and nitroaromatic compounds.

A novel fluorescent triazine-based covalent organic polymer (COP-1) sensor for HCl and NH3 gases has been designed and synthesized.

A new triazine-based covalent organic polymer (named COP-NT), which showed high catalytic activities for the degradation of acidic and basic dyes, is synthesized. Its structure characteristics were fully investigated, which featured large specific surface area, homogeneous porosity, strong visible light absorption, excellent thermal stability and semiconductor performance. The as-prepared COP-NT exhibits good chemical stability both in acidic and alkaline aqueous solutions, which could be used as an efficient photocatalyst for the degradation of methyl orange (MO), rhodamine B (RhB) and methylene blue (MB). The E values for the degradation of MO, RhB or MB are 9.40 kJ mol, 30.94 kJ mol or 17.54 kJ mol, respectively. Furthermore, COP-NT showed excellent reusability in degrading all the above dyes without obvious performance decay.

A set of novel porphycenes was synthesized on a gram-scale in high overall yields by optimization of macrocyclization of E/Z-mixed 5,6-diaryldipyrroethenes.

The 2,6-naphthalenedicarboxamide chromophore has been investigated as a fluorescent probe for DNA hairpin and duplex formation and DNA electron transfer. The high fluorescence quantum yield and long singlet lifetime of this chromophore make it an attractive candidate for these studies. The kinetics of intermolecular quenching of a naphthalenedicarboxamide by nucleosides is dependent upon the nucleoside oxidation potential and solvent. Bis(oligonucleotide) conjugates containing naphthalene linkers have been prepared by means of conventional phosphoramidite chemistry. The base-sequence dependence of the naphthalene fluorescence intensity and decay times in both single-strand and hairpin conjugates indicates that singlet naphthalene is quenched by neighboring dA more efficiently than by dT, in accord with an electron-transfer quenching mechanism. These data are analyzed by means of a three-state model which includes a nonemissive “dark” state. Duplexes formed between complementary naphthalene-linked oligonucleotides display naphthalene excimer emission. The base-sequence dependence of the excimer emission quantum yields indicates that the excimer is not quenched by neighboring dA but that distance-dependent electron-transfer quenching by dG may occur. Quenching serves to protect the naphthalene chromophore from photobleaching in both single strand and duplex structures.

The K2S2O8-catalyzed versatile C(sp2)-C(sp3) bond formation with N-heteroaromatics and γ-lactams/amides was developed. Quinoxalin-2(1H)-one, quinoline, isoquinoline, phthalazine, and benzothiazole reacted with γ-lactams/amides to give the corresponding C(sp2)-H amidoalkylation products in moderate...