Jianrong Lin

Design, Syntheses and Extraction Properties of Novel Bis-calix[4]arene and Tris-calix[4]arene Containing Two Kinds of Calix[4]arene Derivative Units

By condensation of calix[4]arene 1,3-bis-hydrazide derivative 5 and calix[4]arene mono-benzaldehyde derivative 2, and then intramolecular bridging with triethylene glycol ditosylates, two novel tris-calix[4]arenes 6 and 7 containing two kinds of calix[4]arene derivative units were prepared in reasonable yield. When reacting compound 5 with calix[4]arene 1,3-bis-benzaldehyde derivative 3, novel bis-calix[4]arene 8 containing two different calix[4]arene derivative units was obtained in high yield. The extraction experiments showed that the new hosts 6, 7 and 8 possessed excellent complexation abilities towards metal cations and α-amino acids. Tris-calix[4]arene 7 showed good complexation selectivity towards Ag+ and basic α-amino acid.

Design and Syntheses of Novel Calix[4](aza)crowns: Neutral Receptors for α‐Amino Acids

Abstract A series of novel calix[4](aza)crowns 2a–2d containing acylhydrazone groups was designed and synthesized via 1+1 condensation of calix[4]‐1,3‐substituted benzaldehyde derivative 1 with bis‐hydrazides in 85–90% yields. They showed good complexation abilities toward α‐amino acids and exhibited complexation selectivity toward tryptophane.

Near-infrared fluorescent and columnar liquid crystal: synthesis, and photophysical and mesomorphic properties of triphenylene-Bodipy-triphenylene triad

The first near-infrared fluorescent and columnar liquid crystal based on Bodipy was achieved by modifying 3,5-alkenyl substituted Bodipy with two triphenylene units. Triphenylene-Bodipy-triphenylene triad with 3,5-alkenyl groups exhibited hexagonal columnar mesophase and near-infrared fluorescence at 650–800 nm with the quantum yield of 31%.

Novel fluorescent liquid crystals: synthesis, mesomorphism and fluorescence of triphenylene-Bodipy derivatives based on 1,3,5-triazine core

ABSTRACT The novel triphenylene-Bodipy derivatives 6 and 7 based on 1,3,5-triazine core were designed and synthesised by introducing BODIPY unit and triphenylene units sequentially onto cyanuric chloride. The Bodipy derivative 6 with one triphenylene unit was a nematic liquid crystal but the derivative 7 with two triphenylene units was a hexagonal columnar liquid crystal. The investigation on photophysical properties suggested that both of them exhibited excellent fluorescence with high fluorescence quantum yields and the Stokes shifts were larger than their Bodipy precursors. This research presented a good example of design and synthesis of columnar Bodipy liquid crystal with high fluorescence and large Stokes shift. GRAPHICAL ABSTRACT

Multiple BODIPY derivatives with 1,3,5-triazine as core: balance between fluorescence and numbers of BODIPY units

The multiple BODIPY derivatives could exhibit higher fluorescence than mono-BODIPY derivatives but also might produce the stronger aggregation-induced quenching effect. It is important to investigate the relationship between fluorescence and numbers of BODIPY units. In this work, series of multiple BODIPY derivatives 2–5 with 1,3,5-triazine as core were designed and synthesized in high yields. A subtle balance between the fluorescence enhancement of multiple BODIPY units and fluorescence quenching based on H-aggregation of multiple BODIPY units was observed for these multiple BODIPY derivatives. Compound 3 bearing two BODIPY units with triazine as core presented the strongest fluorescence emission and highest fluorescence quantum yield. Compound 3 was successfully applied in viscosity measurement, exhibiting the linear relationship between fluorescence intensity (or steady-state emission anisotropy) and viscosity.