Anion‐Receptive Triazine‐Centered Azobenzene Trimers
Chem. Eur. J. 2026, e70669. Triazine-centered C3-symmetric azobenzene trimers were synthesized using complementary azo-forming strategies, providing a versatile platform for multiresponsive molecular photoswitches. Relative to the isoelectronic benzonitrile monomer, incorporation of the triazine core induces an intrinsic bathochromic shift of the azobenzene absorption bands. The thiomethoxy-substituted derivative exhibits negative photochromism, enabling efficient trans–cis.
Sustainable Synthesis of 4,7-Dihydro-4,7-ethano-2H-isoindoles—Key Building Blocks to Benzoporphyrins
Chem. Eur. J. 2026, 32, e70979. Benzoporphyrins, π extended porphyrin analogues, exhibit remarkable potential for optoelectronic and theragnostic applications, yet have remained largely confined to fundamental studies owing to the challenging synthesis of masked isoindole precursors. Here, we report a concise, scalable three-step synthesis of 4,7-dihydro-4,7-ethano-2H-isoindole, a key building block of the benzoporphyrin framework. Subsequent functionalization affords the co
From Yellow to Red: Emission Tuning of Benzothioxanthene Imides Through Selective Multi-Arylamine Functionalization
ChemPlusChem 2026 , 91 , e70135 . The selective bis- and tris-functionalization of benzothioxanthene imides (BTI) with extended triphenylamine (eTPA) units, enabling precise tuning of optical and electronic properties, is introduced herein. Controlled bromination and subsequent Suzuki–Miyaura cross-coupling allow modular introduction of donor groups, resulting in redshifted emission into the red–near-infrared (NIR) region with large Stokes shifts and fluorescence quantum yi
