Indolizine-Squaraines: NIR Fluorescent Materials with Molecularly Engineered Stokes Shifts was written by McNamara, Louis E.;Rill, Tana A.;Huckaba, Aron J.;Ganeshraj, Vigneshraja;Gayton, Jacqueline;Nelson, Rachael A.;Sharpe, Emily Anne;Dass, Amala;Hammer, Nathan I.;Delcamp, Jared H.. And the article was included in Chemistry – A European Journal in 2017.SDS of cas: 80480-15-5 The following contents are mentioned in the article:
The development of deep red and near IR emissive materials with high quantum yields is an important challenge. Several classes of squaraine dyes have demonstrated high quantum yields, but require significantly red-shifted absorptions to access the NIR window. Addnl., squaraine dyes have typically shown narrow Stokes shifts, which limits their use in living biol. imaging applications due to dye emission interference with the light source. Through the incorporation of indolizine heterocycles we have synthesized novel indolizine squaraine dyes with increased Stokes shifts (up to >0.119 eV, >50 nm increase) and absorptions substantially further into the NIR region than an indoline squaraine benchmark (726 nm vs. 659 nm absorption maxima). These materials have shown significantly enhanced water solubility, which is unique for squaraine dyes without water-solubilizing substituents. Absorption, electrochem., computational, and fluorescence studies were undertaken and exceptional fluorescence quantum yields of up 12 % were observed with emission curves extending beyond 850 nm. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5SDS of cas: 80480-15-5).
2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.SDS of cas: 80480-15-5
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary