A Photoswitchable Fluorophore for the Real‐Time Monitoring of Dynamic Events in Living Organisms
作者:Yang Zhang、Sicheng Tang、Lorenzo Sansalone、James D. Baker、Françisco M. Raymo
DOI:10.1002/chem.201603545
日期:2016.10.10
This study reports the synthesis of a photoactivatable fluorophore with optimal photochemical and photophysical properties for the real‐time tracking of motion in vivo. The photoactivation mechanism designed into this particular compound permits the conversion of an emissive reactant into an emissive product with resolved fluorescence, under mild illumination conditions that are impossible to replicate
Effect of nature of anchoring groups on photosensitization behavior in unsymmetrical squaraine dyes
作者:Gururaj M. Shivashimpi、Shyam S. Pandey、Rie Watanabe、Naotaka Fujikawa、Yuhei Ogomi、Yoshihiro Yamaguchi、Shuzi Hayase
DOI:10.1016/j.jphotochem.2013.09.004
日期:2014.1
indole based unsymmetrical squaraine dyes bearing various anchoring groups such as carboxylate (SQ-A), cyanoacrylate (SQ-B) and thiophene-bridged cyanoacrylate (SQ-C) were synthesized and evaluated for their performance in dye sensitizedsolarcells (DSSCs) under similar experimental conditions. Electronic absorption spectral investigation on thin films of these dyes adsorbed on nanoporous TiO2 reveals
Diastereoselective synthesis of indolenine-based spiro[pyrazolone-4,2′-pyrrolidine] scaffolds <i>via</i> 1,3-dipolar cycloaddition of 4-aminopyrazolones, aldehydes, and indolenines
作者:Shah Nawaz、Shiqiang Wei、Yue Huang、Wenyao Wang、Jingping Qu、Baomin Wang
DOI:10.1039/d1ob01135a
日期:——
report a one-pot [3 + 2] cycloaddition of 4-aminopyrazolones, indolenines, and aldehydes. The reaction utilized in situ generated azomethine ylides as 1,3-dipoles and 2-alkenylindolenines as dipolarophiles affording indolenine-derived spiro[pyrazolone-4,2′-pyrrolidine] scaffolds with four contiguous stereocenters with excellent yields (up to 95%) and diastereoselectivities (up to >20 : 1 dr) under
Synthesis and Computational Study of Semicroconaines and Nonsymmetric Croconaines
作者:Maria Annunziata M. Capozzi、Angela Punzi、Francesco Babudri、Roberta Musio、Gianluca M. Farinola
DOI:10.1021/acs.joc.8b01930
日期:2018.12.7
The synthesis of two new dye families of croconic acid derivatives, semicroconaine and nonsymmetric croconaine dyes, is reported for the first time. These compounds show strong absorption in the UV–visible and NIR, respectively. Semicroconaine dyes were obtained by a scalable and efficient condensation of croconic acid with aromaticheterocyclic methylene-active compounds. The subsequent reaction of
Eco-friendly, in-water, and catalyst-free assembly of acylethenylpyrroloimidazoindoles from 3<i>H</i>-indoles and acylpyrrolylacetylenes
作者:Ludmila A. Oparina、Kseniya V. Belyaeva、Nikita A. Kolyvanov、Igor A. Ushakov、Denis N. Tomilin、Lyubov N. Sobenina、Anton V. Kuzmin、Boris A. Trofimov
DOI:10.1039/d3nj05049a
日期:——
presumably proceeds in a micellar-like microreactor self-assembled in a two-phase aqueous medium that secures favorable mutual orientation of the merging molecules, providing a facile [2+3] concerted cycloaddition to finally form fused polyheterocyclic systems. The performed DFT calculations are in agreement with such mechanistic considerations, particularly those underlying the crucial role of water in the