A water soluble probe with near infrared two-photon absorption and polarity-induced fluorescence for cerebral vascular imaging
摘要:
一种水溶性 Lemke 发色团衍生物的发射效率显示出不同寻常的极性依赖性,当与适当的水溶性聚合物链配合时,可在水中产生强烈的红-近红外荧光。在这篇边缘文章中,介绍了该发色团的合成。实验研究了其荧光对溶剂极性的依赖性,并在 ab initio 计算的基础上对其进行了合理化。最后,我们证明这种发色团是脑血管活体双光子成像的重要候选物质,其双光子吸收和发射均在生物透明窗口内。
Near-Infrared Solid-State Emitters Based on Isophorone: Synthesis, Crystal Structure and Spectroscopic Properties.
摘要:
A series of near-infrared solid-state emitters based on the dicyanoisophorone electron acceptor group was synthesized. The solid-state spectroscopic properties were studied by UV-visible absorption spectroscopy and fluorescence spectroscopy and analyzed in light of the single crystal structures obtained by X-ray diffraction. This series of push-pull dipolar fluorophores differing only by the substituent groups on the donor end display interesting solid-state emission properties on crystal with an emission in the near-infrared ranging from 710 to 790 nm. The origin of the emission depends on the nature of the substituent groups that influence the crystal packing and trigger the formation of long chain of emitting aggregates.