Pyrimidine-containing β-iminoenolate difluoroboron complexes acting as non-traditional π-gelators and mechanofluorochromic dyes

Abstract

A xerogel-based film based on a mechanofluorochromic dye of a β-iminoenolate difluoroboron complex could detect TFA vapor with high performance.

Advances in the Supramolecular Chemistry of Tetracoordinate Boron-Containing Organic Molecules into Organogels and Mesogens

“…On the other hand, on further extending the conjugation no gel formation was observed due to an imbalance in π-π interactions. Another similar report by Mi et al showed that the pyrimidine containing β-iminoenolate-difluoroboron complexes 9a–b self-assembled into organogels upon the introduction of tert -butyl group which provided an optimum strength to π-π interactions ( Mi et al, 2018 ). The xerogel-based film of 9b was observed to emit yellow light and was used as a fluorescent sensor to detect vapors of trifluoroacetic acid with a decay time and detection limit of 0.8 s and 260 ppb, respectively.…”

“…Reproduced with permission from Gong et al, 2015Gong et al, , copyright 2015 Royal Society of Chemistry. Reproduced with permission from Mi et al, 2018Mi et al, , copyright 2018 Royal Society of Chemistry. Reproduced with permission from Sun et al, 2017Sun et al, , copyright 2017 Royal Society of Chemistry.…”

Recent advances in the synthesis of luminescent tetra-coordinated boron compounds

“…The type of aryl group, spacers and mode of coordination had influence on the photophysical properties of the resultant products. 135–169 The Lu group 142,149 synthesized N,O-chelated BF 2 compounds 138–142 (Fig. 17).…”

“…In 2018, the Ye group 155 synthesized pyrimidine-containing β-iminoenolates as ligands and their BF 2 complexes ( 175 and 176 ). Compound 176 (Fig.…”

Photomechanical effects of acidochromic diarylethene derivatives

“…可见, 阻断发光基团间的强π-π相互作用是设计 高效固态发光材料的有效策略. 在前期工作中, 本课题 组利用小分子有机凝胶剂的胶凝化构筑了基于菲并咪 唑 [30] 、苯并噻唑 [31] 、嘧啶取代的β-亚胺酮二氟化 硼 [32] 、苯乙烯基喹喔啉 [33] 、苯乙烯基苯并 唑衍生 物 [34] [47] 、跳跃和爆裂 [48,49] 等运动的驱动力.…”