groups on N atoms in the indole rings, nine novel aminoderivatives were designed and synthesized by butylamine, taurine, or benzylamine reacting with the indocyanines for substitution nitrogen for chlorine. The obtained products were purified by SiO2 column chromatography, and confirmed by ESI-MS and 1H NMR. Compared to the parents, the aminoderivatives showed blue shifts, larger Stokes shifts, and stronger
在吲哚环的N原子上具有甲基,乙基或对羧基苄基的三种七甲叉吲哚花青的合成基础上,通过丁胺,牛磺酸或苄胺与吲哚花青反应用氮取代氯来设计和合成了九种新型氨基衍生物。 。所得产物通过SiO 2柱色谱法纯化,并通过ESI-MS和1进行确认。1 H NMR。与母体相比,氨基衍生物表现出蓝移,较大的斯托克斯位移和较强的荧光强度,这主要与氨基衍生物中氨基取代基的供电子能力有关。氨基取代基的更强的供电子能力使最大吸收波长显示出更大的蓝移。
Improving the brightness and photostability of NIR fluorescent silica nanoparticles through rational fine-tuning of the covalent encapsulation methods
Near-infrared (NIR) fluorescence imaging technology calls for highly bright and photostable emissive materials for long-term and real-time bioimaging and medical diagnosis. Herein, we report that four aminocyanine dyes were covalently encapsulated inside silicananoparticles by reverse microemulsion using different linkage methods. The fluorescence brightness and photostability of the obtained fluorescent
A near-infrared fluorescent sensor for H^+ in aqueous solution and living cells
作者:AIBIN WU、LIPING DUAN
DOI:10.3906/kim-1007-830
日期:——
A heptamethine cyanine-based sensor (1) was designed and synthesized by incorporating heptamethine cyanine fluorophore and methylpiperazine. Sensor 1 exhibited good response to the change of pH levels, and a large Stokes shift (>100 nm) was obtained. Fluorescent image experiments in living cells further demonstrated its potential applications in biological systems.