Tunable full-color dual-state (solution and solid) emission of push–pull molecules containing the 1-pyrindane moiety

• Anastasia I. Ershova,
• Sergey V. Fedoseev,
• Konstantin V. Lipin,
• Mikhail Yu. Ievlev,
• Oleg E. Nasakin and
• Oleg V. Ershov

Beilstein J. Org. Chem. 2024, 20, 3016–3025, doi:10.3762/bjoc.20.251

• acid both in solution and in the solid state. Keywords: dual-state emission; full-color emission; nitriles; push–pull molecules; pyrindane; stilbazole; Introduction Over the past decades, heteroaromatic push–pull molecules have attracted great attention due to their widespread use in materials

• chemistry. This type of chromophores is of particular interest in the fields of organic electronics, photonics, and optoelectronics due to their unique optical and electronic properties [1][2][3][4][5][6][7][8][9][10][11][12][13]. Among heteroaromatic push–pull molecules, stilbazole derivatives

• (pyridostilbenes, azastilbenes, styrylpyridines or azinylarylethenes) are an important class. Uniquely, stilbazole provides a universal framework (exclusive matrix) for the design of donor–π–acceptor (D–π–A) molecules [14][15]. It has a branched π-conjugated system, in which the aromatic ring acts as a donor and

Tuning the solid-state emission of liquid crystalline nitro-cyanostilbene by halogen bonding

• Subrata Nath,
• Alexander Kappelt,
• Matthias Spengler,
• Bibhisan Roy,
• Jens Voskuhl and
• Michael Giese

Beilstein J. Org. Chem. 2021, 17, 124–131, doi:10.3762/bjoc.17.13

• narrower and liquid crystallinity is induced starting with NO2-C9∙∙∙F4Az (see Figure 3). The reduced performance of the azo series compared to the stilbazole series is in line with previous reports and can be attributed to the repulsion of the free electron pairs of the azo group [7]. Interestingly

• , enantiotropic phase transitions were observed exclusively for NO2-C10∙∙∙F4Az, indicating a different solid-state arrangement of the azo compounds compared to the stilbazole-based assemblies. The mesomorphic properties of all nitro compounds and the assemblies are summarised in Figure 3 and Table 1. The strength

Fluorescent phosphorus dendrimers excited by two photons: synthesis, two-photon absorption properties and biological uses

• Anne-Marie Caminade,
• Artem Zibarov,
• Eduardo Cueto Diaz,
• Aurélien Hameau,
• Maxime Klausen,
• Kathleen Moineau-Chane Ching,
• Jean-Pierre Majoral,
• Jean-Baptiste Verlhac,
• Olivier Mongin and
• Mireille Blanchard-Desce

Beilstein J. Org. Chem. 2019, 15, 2287–2303, doi:10.3762/bjoc.15.221

• para- to the meta-position of the stilbazole units, and analogously, the second-generation dendrimer G2 leads to a higher ratio than the first-generation dendrimer, which corresponds in both cases to an increasing proximity of the chromophoric subunits [52]. A second series of compounds concerned

Thermotropic and lyotropic behaviour of new liquid-crystalline materials with different hydrophilic groups: synthesis and mesomorphic properties

• Alexej Bubnov,
• Miroslav Kašpar,
• Věra Hamplová,
• Ute Dawin and
• Frank Giesselmann

Beilstein J. Org. Chem. 2013, 9, 425–436, doi:10.3762/bjoc.9.45

• silver-containing thermotropic liquid-crystalline materials based on bis(stilbazole) silver(I) cation in association with the amphiphilic counter-ion lauryl sulfate exhibit lyotropic and thermotropic liquid-crystalline behaviour [20]. A series of monoalkyl glycosides possesses a very stable thermotropic