Metacyclophanes were prepared by cyclization reactions between bis(chloromethyl) compounds and piperazine, primary amines, or ethylene glycol. The 1H nmr relaxation time (T1) measurements indicated that the macrocycles feature the up and down motion of the aromatic units around the XCH2Ar (X = N, O) methylene moieties as the axes. Metacyclophanes incorporating piperazine units showed high complexation
Distyrylbenzene-based segmented conjugated polymers: Synthesis, thin film morphology and chemosensing of hydrophobic and hydrophilic nitroaromatics in aqueous media
作者:Marcela F. Almassio、Maria J. Romagnoli、Pablo G. Del Rosso、Ana Belén Schvval、Raúl O. Garay
DOI:10.1016/j.polymer.2017.02.069
日期:2017.3
Two new segmentedconjugated polymers bearing distyrylbenzene chromophoric units and their model compounds were synthesized. The tendency of the model compounds to form H- and J-type aggregates in the amorphous matrix was greatly diminished by the twisted polymeric architecture. Fluorescence anisotropy measurements indicated good exciton mobilities in condensed phase. Fluorescence quenching by nitroaromatic
A novel 4,13,19,28-tetrahydroxy-9,9,24,24-tetramethyl[2.1.2.1]metacyclophane is prepared from bisphenol A in six steps and found to have a saddle structure in solid state.
一种新型 4,13,19,28- 四羟基-9,9,24,24-四甲基[2.1.2.1]偏环烷由双酚 A 经过六个步骤制备而成,并发现其在固态下具有鞍状结构。