1019-12-1Relevant articles and documents
Indolizine-Cyanine Dyes: Near Infrared Emissive Cyanine Dyes with Increased Stokes Shifts
Gayton, Jacqueline,Autry, Shane A.,Meador, William,Parkin, Sean R.,Hill, Glake Alton,Hammer, Nathan I.,Delcamp, Jared H.
, p. 687 - 697 (2019)
Molecular engineering strategies designed to red-shift cyanine dye absorptions and emissions further into the near-infrared (NIR) spectral region are explored. Through the use of a novel donor group, indolizine, with varying cyanine bridge lengths, dye absorptions and emissions, were shifted deeper into the NIR region than common indoline-cyanines. Stokes shifts resulting from intramolecular steric interactions of up to ?60 nm in many cases were observed and explained computationally. Molecular brightnesses of up to 5800 deep into the NIR region were observed. Structure-property relationships are explored for the six indolizine-cyanine dyes with varying cyanine bridge length and indolizine substituents showing broad absorption and emission tunability. The dyes are characterized by crystallography, and the photophysical properties are probed by varying solvent for absorption and emission studies. Computational data show involvement of the entire indolizine ?-system during light absorption, which suggests these systems can be tunable even further into the NIR region through select derivatizations.
Indolizine-based chromophores with octatetraene π-bridge and tricyanofurane acceptor: Synthesis, photophysical, electrochemical and electro-optic properties
Kalinin, Alexey A.,Fazleeva, Guzel M.,Burganov, Timur I.,Islamova, Liliya N.,Dudkina, Yulia B.,Kadyrova, Alfira A.,Vakhonina, Tatyana A.,Khamatgalimov, Ayrat R.,Mukhtarov, Anvar S.,Bazarov, Valeriy V.,Katsyuba, Sergey A.,Budnikova, Yulia H.,Balakina, Marina Yu.
, (2019/10/11)
Two isomeric indolizine-based chromophores (MPI-1)-OT-TCF and (MPI-3)-OT-TCF with octatetraene π-bridge and tricyanofuran acceptor moieties have been synthesized and systematically investigated. Chromophores exist as a mixture of E- and Z-isomers in low-p
Studies on the base-induced rearrangement of 5-methyl-3-nitrosoindolizine derivatives
Wang, Peng,Cai, Jin,Chen, Junqing,Ji, Min
, p. 1185 - 1191 (2016/01/12)
Here we have studied the rearrangement of 5-methyl-3-nitrosoindolizine derivatives in the presence of K2CO3. 5-Methyl-3-nitrosoindolizine derivatives can be converted to ring-opening, rearrangement and denitrosylation products respec