312624-91-2

Upstream product

• 312624-89-8 (4-{2,5-dihexyl-4-[4-(tetrahydro-pyran-2-yloxy)-phenylethynyl]-phenylethynyl}-2,5-dihexyl-phenylethynyl)-triisopropyl-silane 
• 220280-82-0 [4-(4-Ethynyl-2,5-dihexyl-phenylethynyl)-2,5-dihexyl-phenylethynyl]-triisopropyl-silane 
• 220280-80-8 3-(4-{2,5-Dihexyl-4-[(triisopropylsilanyl)-ethynyl]-phenylethynyl}-2,5-dihexyl-phenyl)-prop-2-yn-1-ol 

Downstream Products

• 1236050-62-6 C₇₃H₁₀₁IO₄ 

Relevant academic research and scientific papers

EPR probes with well-defined, long distances between two or three unpaired electrons

The synthesis of rod- and star-shaped compounds carrying two or three spin labels as end groups is described. The unpaired electrons are 2.8-5.1 nm apart from each other. The shape-persistent scaffolds were obtained through Pd-Cu-catalyzed alkynyl-aryl coupling and Pd-Cu-catalyzed, alkyne dimerization in the presence of oxygen using p-phenyleneethynylene as the basic shape-persistent building block. The spin label 1-oxyl-2,2,5,5-tetramethylpyrroline-3-carboxylic acid (4) was attached through esterification of the terminal phenolic OH groups of the scaffold.