Coordination-Directed Assembly of Luminescent Semiconducting Oligomers and Weak Interaction-Induced Morphology Transformation

Abstract

Luminescent semiconducting oligomers (LSOs) have been one of the most popular molecular materials that can be applied in various fields because of their distinctive optical properties. The study of molecular packing and morphological change of oligomers is essential for the rational design of materials and regulation functions. Herein, we report two novel LSOs (OFBB and OFBT) with a slight difference in chemical structures but show a distinct difference in self-assembly behaviors in the coordination-driven process. OFBB forms spherical particles with Zn(II). Compared with OFBB, OFBT has an additional thiazole moiety, which forms spherical particles with Zn(II) and then transforms to a crystalline nanobelt in 2 h. The process and mechanism of the nanosphere and nanobelt formation were investigated in detail. The double S···N interaction between two benzothiazoles in adjacent oligomers played a significant contribution in this dynamic morphology transformation. In addition, the as-prepared two products showed excellent sensing toward nitrobenzene with good selectivity over other nitro-aromatic explosives.

Cu2O nanoparticles anchored on carbon for the efficient removal of propofol from operating room wastewater via peroxymonosulfate activation: efficiency, mechanism, and pathway

“…1e) showed fuzzy lattice stripes, which correspond with those previously reported for MOFs. 21,36 Aer pyrolysis, the morphology of the sample remains mostly unchanged, with slight aggregation (Fig. 1b), and the TEM image showed better light transmission (Fig.…”

Cobalt‐Enhanced Mass Transfer and Catalytic Production of Sulfate Radicals in MOF‐Derived CeO2 • Co3O4 Nanoflowers for Efficient Degradation of Antibiotics

“…The Fourier transform infrared (FTIR) spectra was introduced to investigate the coordination mode of the carboxyl group in the assembly process. [46,47] The FTIR spectra of the four MOFs showed the v as and v sym peaks of carboxyl group located at around 1585 cm −1 and 1403 cm −1 with △v = 182 cm −1 (Figure 2b), which strongly indicated that the TCPP ligand mainly adopted bridging bidentate coordination mode with the Ce-O clusters in all four MOFs. [48,49] Simultaneously, for the Ce-TCPP, there was a sharp peak located at 1383 cm −1 standing for the v sym of the NO 2 , which indicated that the NO 3 − also participated in the coordination process to balance the charge and fulfill the unsaturated coordination sites of the Ce-O clusters.…”

Nanoscale Metal-Organic Frameworks as Fluorescence Sensors for Food Safety

“…Facile and sensitive analysis methods for in situ and real-time sensing are urgently needed. Fluorescence-based analysis emerged as a promising method to improve safety sensing [ 3 , 4 , 5 , 6 ]. Quantum dots, organic fluorescence dyes, and metallic nanoclusters are classical fluorescent materials; however, these materials inevitably showed weakness such as toxicity, poor selectivity and stability, and high costs [ 7 , 8 , 9 ].…”